Hire the best Open Source developers

Check out Open Source developers with the skills you need for your next job.
Clients rate Open Source developers
Rating is 4.7 out of 5.
4.7/5
based on 104 client reviews
  • $75 hourly
    I am an enthusiastic, Denver based mechanical engineer with an extensive background in design for manufacturing and the appropriate use of additive manufacturing technology. With over 13 years of industry experience, I'm passionate about designing exceptional and innovative products. Before I started freelancing, I was a Sr. Mechanical Engineer at Aleph Objects and worked with a multidisciplinary team to produce several award winning 3D printers and accessories. Following that, I launched my own brand and line of niche products in the industrial 3D printing space, gaining experience with brand communication, crowdfunding and small scale production management. As a freelancer, I've had the opportunity to work with some fantastic clients producing everything from EV chargers and home battery systems to fitness equipment, college courses and medical devices. I run a small print farm in house for prototyping, including resin and oversized material extrusion printers. This helps reduce prototyping costs, speeds up the development process and allows the fastest iteration time possible when needed. Here are some of the services I offer: - Design Conceptualization (early stage sketches and ideation) - 3D Design - Photorealistic Product Renderings - Manufacturing Documentation *Bill of Materials (BoM) * 2D Drawings * Material and Manufacturing Method Advice * Tech Packs - Electronics Prototyping - Product Prototyping - Small Batch Production - Contract 3D Printing
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    Reverse Engineering
    Mechanical Engineering
    Mechanical Design
    Git
    Product Design
    Blender
    3D Printing
    Freecad
    CAD
    3D Rendering
    3D Design
    3D Modeling
  • $95 hourly
    I have experience in building custom software solutions tailor-made to your requirements. My skill-set spans multiple domains like financial, healthcare, eCommerce, advertising, education, life sciences, hotel/hospitality, media and entertainment, retail, real estate, sports and fitness, mobile and wireless, technology, non-profit and more industries. I use structured programming incorporating leading & tested frameworks, best programming practices, coding guidelines and standards. As the technology advances gradually and the programming landscape changes globally, inorder to accommodate the world's growing technological needs, I constantly evaluate the latest trends in the development community and try to constantly improve and upgrade my skills to provide my clients the best possible development solutions.
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    OAuth
    Moodle
    Linux System Administration
    Google Map Maker
    Facebook Development
    Google Cloud Platform
    ChatGPT
    AJAX
    Angular
    React
    Python
    Database
    PHP
    .NET Framework
  • $220 hourly
    I am a CTO level consultant specializing in research and development of Robotics systems. Over the nine years of my professional careers I learned to apply kaizen (continuous improvement) in software and robotics development. As you will see from my profile I work mostly with wheeled mobile robots and drones, often utilizing Robot Operating System (ROS). In my view good practices and iterative development are key to creating high quality products. Let's make them together and let's solve issues before they even arise. I take very good care of honing my skills and staying up to date on the current state of Robotics thus each week I release a new issue of my Weekly Robotics newsletter. Below you will find some highlights of my expertise: ROS: * Navigation stack * Localization stack * ros_control * cartographer, slam_toolbox, AMCL * Deploying ROS on custom robotic solutions * Developing drivers for sensors and actuators Drones: * Px4 flight stack * ArduPilot (ArduCopter, ArduRover) * Developing drivers for custom sensors for the above flight stacks * Using ROS on a companion computer for high level control Sensors experience: * ToF sensors (single points and arrays) * Ultra Wide Band (UWB) localization * RTK GPS * Single and multiplane LiDARs (Hokuyo, RPLIDAR, Livox, Ouster OS-1) * IMUs (RazorIMU, Bosch BNO055, PhidgetSpatial, Xsens) * Tracking modules (Realsense T265) * 3D Cameras (Realsense D435i)
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    Drone
    Robotics
    Embedded System
    Mechatronics
    Robot Operating System
    Python
    Desktop Application
    C
    C++
    C#
  • $35 hourly
    👋 Hi, I'm Mark, CEO and CTO at Pinely. I lead our development projects, ensuring they align perfectly with your business objectives. We provide: Web & Mobile Apps: We develop on iOS, Android, and web platforms. Desktop Applications: Tailored software for Windows, MacOS, and Linux. AI & ERP Solutions: We integrate advanced AI and efficient ERP systems into your operations. Client Benefits: Start right away with rapid delivery. Straightforward, clear updates without jargon. Consistent results across various industries. What Clients Say: "Pinely delivers on promises." "The Pinely project manager really cares about our project." "Working with Pinely, we've achieved big things." Check our Clutch profile for more reviews. Let's talk and solve your challenge together. Regards, Mark 🌲
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    SQL
    Redux
    Node.js
    Agile Project Management
    React
    Auth0
    MongoDB
    Elasticsearch
    Telegram API
    JavaScript
  • $25 hourly
    Hey, My name is Naveen Shankar Sharma, it's evident that I am an experienced and dedicated sourcing and procurement professional with over 15 years of experience. I have an extensive background in sourcing products, vendors, and manufacturers across India, which indicates a deep understanding of the market and its intricacies. My range of activities as a sourcing agent covers all aspects of the sourcing and procurement process, including product origin sourcing, vendor identification, factory auditing, price negotiation, quality control, and logistics services. It's impressive that I have sourced and procured over 200 products and vendors, both through online channels and door-to-door approaches, which shows adaptability and resourcefulness in my work. My focus on assisting small companies and attention to detail, such as ensuring on-time delivery and product and packaging inspections, reflects your commitment to providing excellent service to my clients. If there's anything specific, I'd like to know or discuss, whether related to sourcing, procurement, or any other topic, feel free to share, and I'll be happy to assist you further!
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    Logistics Coordination
    Product Sourcing
    Sourcing
    Factory & Supplier Auditing
    Buying
    Product Development
    Supply Chain & Logistics
    Market Research
    Procurement
    Quality Inspection
    Supplier Search
  • $15 hourly
    Freelancer since 2014 and customer support for 14 years. I am results oriented, dependable and a professional with a solid performance track record.
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    Helpshift
    Shopify
    Shopify Apps
    Gmail
    Customer Service
    Technical Support
    Helpdesk
    Online Chat Support
    Email Support
    Zendesk
  • $89 hourly
    🏆 Top Rated UpWork freelancer 🕓 9000+ hours worked ⭐ 5-star feedback ☑️ Verified portfolio I work regularly across all the cloud platforms (AWS, GCP, Azure) designing and building scalable efficient infrastructure. I mainly work using AWS, using Lambda, DynamoDB, EC2, ECS, RDS, EKS, Cognito, AppSync, Amplify. I also have experience in NodeJS, Javascript, and front-end development primarily using React & Angular. I'm very familiar with RESTful & GraphQL APIs either integrating them or building them out to integrate other services. In addition to deploying & managing containerised applications using Kubernetes.
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    Next.js
    Front-End Development
    Full-Stack Development
    AngularJS
    Amazon EC2
    React
    NoSQL Database
    HTML
    Back-End Development
    SQL
    TypeScript
    Node.js
    Python
    JavaScript
  • $30 hourly
    To deliver high quality software which meets user implicit & explicit requirements by employing preventive methods. I have opted software testing as my career not because I got the opportunity to work but I am in software testing because I believe Software Testing as "Destructive Creation" and I enjoy finding issues by hook or by crook. I am not only a tester who can do just some testing work and report issues, I can also help you in Implementing Test process, Automation tool selection, QA documentation and can provide end to end solution on all types of testing. I have expertise in Manual, Automation, Performance, Security, Mobile, Database and Whitebox testing. The detail experience is mentioned below - Manual testing - Functional, Non-functional, Sanity, Smoke, Regression, Acceptance, Browser Compatibility, Device Compatibility, Platform Compatibility, Black Box testing, Static testing, Dynamic Testing. -Requirement analysis -Test case designing -Test execution and defect reporting -Test verification and end to system testing -Test release. Automation Testing - - JavaScript Automation framework - - Playwright - WebdriverIO - Jest - Cypress - Protractor - Nightwatch - Detox - Mocha, Jesmin, Chai - Wdio Appium Non-JavaScript Automation framework - -Selenium WebDriver -Cucumber -Specflow -Bahat -Appium -TestNG -Junit -Nunit -Selenium IDE, RC -QTP -Test Complete -Katalon Studio -UFT Python Automation Framework - -Pytest -Seleniumbase.io API Automation - -Java Script - Supertest, Mocha , Chai - Pytest, Request Lib -Rest Assured, Cucumber Accessibility Testing (WCAG Level A, AA, AAA) - -NVDA -JAWS -ChromeVox -Site improve Accessibility Checker -Voice Hover -Firefox accessibility DevTool Performance testing Tools - - JMeter - LoadRunner - NeoLoad - K6.io Database Testing - - ETL Validator - Custom ETL Test Framework - SQL - My SQL - Oracle - Sybase - Microsoft SQL Server - SAP Security Testing - - OSWAP ZAP - SQL MAP Whitebox Testing - - Code Review - Code Deployment Continuous Integration - - Jenkins - Team City - Azure DevOps - Circle CI - Github Actions Testing Compliances - HIPPA, WCAG Level A, WCAG Level AA. Special Testing - Cookie Testing, Overlays Testing, Accessibility Testing (WCAG A, AA) Language Exp. - Java, JS, TS , C#, PHP, .Net, Node.js Testing Methodologies – Agile, Waterfall, Spiral. Testing Documents - Test Plan, Test case Sheet, defect reports, Requirement Traceability Matrix, Risk assessment, Test Strategy document, Testing checklist, Test Summary, Use Case document, Requirement document, User Manual, Training material. Project Management and Defect Reporting Tools - JIRA, Bitbucket, Mantis, Trello, JAMA, Monday.com, Redmine, YouTrack, ScrumDesk, Asana, TestRail, Basecamp, Bugzilla, Clocking IT, Team Foundation Server (TFS), TestLink, ActiveCollab, TestLodge, Zephyr. Business Domain- Healthcare, E-commerce, E-learning, Social Networking, SaaS, PaaS, CRM, Survey, Games, Accounting, IT-Networks, Cloud computing, E-Education, Retail, Advertisement, Hotel Management, Finance, Forex, Trading, Stock Exchange, Real Estate, Insurance, Payment technology, Food Industry, Business Appointments, Timesheet and Schedule, Loan if you are looking for above abilities and qualifications then I can assure you that I best fit in to your alley.
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    Selenium WebDriver
    DevOps
    Test Automation Framework
    Cross-Browser Testing
    Automated Testing
    Cypress
    Katalon Studio
    SpecFlow
    WebdriverIO
    API Testing
    Manual Testing
    Appium
    Web Testing
    Database Testing
    Performance Testing
  • $60 hourly
    I am BS in Electrical Engineering graduated with honors. During my university career I specialized in the design and development of several tools for data processing, feature & pattern extraction, time-frequency analysis, signal convolution (see my portfolio), image classification, linear & nonlinear filtering of time sequences (1D), images (2D), hyper & multi spectral images (3D) as well as the implementation of genetic algorithms for the optimization of Objective Functions subject to linear and nonlinear constraints. In my degree project I implemented a land cover classifier for satellite images (hyper spectrals) using Sparse Signal Representation as an artificial intelligence method positioned in the state-of-the-art (see my portfolio). I currently have more than 3 years of experience in applications that enable extreme performance & accuracy improvements in Machine Learning and in the powerful field of Data Science. In particular, I have heavy expertise implementing models based on classical techniques such as: Binomial and Generalized Logistic Regression, Robust Regression, Neural Networks, Vector Support Machines, K-Nearest Neighbor as well as innovative techniques positioned in the state-of-the-art as Sparse Signal Representation, all of them in applications of Image classification, Denoising, Super Resolution, among others. I have heavy skills in Python and MATLAB (with experience in R as well) so I have used these powerful programming languages for the quickly, reliable and efficient development of my projects. I also carried out 3 masters courses in Biomedical Engineering of Mathematical Methods and Statistics applied to the Engineering, with which I have solid bases to analyze and infer well on the results obtained. Feel free to get in touch with me if you need to solve any problem related to: - Machine learning - Data science - Genetic Algorithms - Signal & Image Processing - Biomedical Image processing
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    MATLAB Script
    Python Script
    Predictive Analytics
    Genetic Algorithm
    Algorithm Development
    Digital Signal Processing
    Image Processing
    Electrical Engineering
    Data Science
    Machine Learning
    Model Optimization
    NumPy
    Computer Vision
    Python
    MATLAB
  • $25 hourly
    🌟 TOP-RATED PLUS consistently From the Last 5 Years. 🏆 195+ Successful Projects On Upwork. 🏅 15000+ Upwork Hours 🏅 𝟭3+ 𝘆𝗲𝗮𝗿𝘀 𝗘𝘅𝗽. 🏅 Worked with Fortune 250+ companies 🏆 Certified AWS, ReactJS I'm an Upwork’s Top Rated (Top 3%) Plus responsible and reliable person. I am capable of working alone as well as being a team player. I can build a site from scratch, or I can continue working with existing code. Do not be confused that I am affiliated with an agency. I am the Founder & CEO of this IT company whi is delivering integrated business intelligence software solutions for the past decade; I have an experienced technologist with a demonstrated history of thought leadership with solid business development skills in building Enterprises Web Applications, and federal and commercial markets. Still, I work as an independent full-stack developer. Being a Full Stack Developer, I'm able to build an entire system from scratch, both back-end and front-end, starting from a project specification in Schemas and design finishing ready server application with all necessary maintenance and further upgrades. I am an expert in build Enterprises Web Applications, Open Source PHP Web Frameworks Development & Management, E-Commerce Custom Development, CMS-based API Development, Databases handling & maintenance, and UI/UX/Wire-framing. If want to hire me, then please read this carefully. ✓ For Hourly projects, we don’t work under $15/hour; we only do ethical rendered billing. ✓ For Fixed projects, we don't start without upfront token money, escrow milestones. ✓ We are available for call anytime on our US Toll-Free No; visit our Website. Why should you hire me? ✅ 182+ Happy Customers with Five Star Feedback. ✅ 11,300+ Verified Business Hours completed, With 85% Client retention ratio. ✅ Earned Top-Rated Service provider badge on Upwork with a success score of 100%. ✅ Client 100% satisfaction with 100% Money Back Guarantee. ✅ Managed more than 2,265+ project estimations and understandings of project scope & flow. ✅ Handling Skilled IT professionals team Size:- 25+ Full-time Employees. ✅ Flexible Engagement Models & 24/7 support across all time zones. ✅ 12+ years of experience in the outsourcing industry. ✅ 50 MBPS high-speed connection with 24-hour Power backup. ✅ Seamless communication, response & updates in less than 12 hours. ✅ 570+ clients spread across diverse business verticals, 11+ industry Verticals. ✅ Work through PMS System (Bitrix24 & Teamwork) with daily status reporting. ✅ The one-stop shop for all IT needs, aReliable disaster recovery system. ✅ Socially Active as NASSCOM Member, ESC Member, CII Member. ✅ Expertise in business domains: Real Estate, Travel, Healthcare, Finance, Insurance, B2B2C, Compliance. We are about 13+ years of strong experience in web/mobile design and developing end-to-end custom solutions for various business practices for SMEs, Digital Agencies, & Startups like healthcare, CRM, ERP, HRM, Inventory Management. My technology of expertise are but not limited to:- ➜ FrontEnd JS Framework :- ReactJS, Gatsby, AngularJS, EmberJS, BackboneJS, VueJS, ModernizrJS ➜ Back-End JS Framework :- ExpressJS, SailsJS, MeteorJS, NodeJS ➜ Automating DevOps Tools:- Git, Jenkins, Maven, Puppet, CHEF, Docker, ELK Stack, Nagios ➜ PHP Framework:- Laravel, CodeIgniter, Zend 1, Zend 2, Yii ➜ E-Commerce:- Shopify, BigCommerce, WooCommerce, osCommerce, ➜ Databases :- MongoDB, MySQL, PostgreSQL ➜ Backend Development:- PHP, Core PHP, Curl, Web Services ➜ CMS Development:- WordPress, Theme Customization, Plugin Development, Joomla, Drupal ➜ Server Management:- WAMP, LAMP, Xampp, Nginx ➜ Agile Development:- Teamwork, Freedcamp, Trello, Jira, Asana, Basecamp. ➜ APIs:- Google, Facebook, Twitter, Google Maps, EAN, Youtube. ➜ Repository Management:- GIT, Bitbucket, SourceTree, and SVN. ➜ Front-End Development:- ReactJS, Sass/Less, Grunt, Gulp. ☬ My Vision:- To acquire lifetime steadfastness of my clients by reliably conveying the most astounding quality programming administrations, including Web, Mobile, Cloud, and IoT, which offer a phenomenal incentive to their business. Besides Healthcare, I have worked with custom software to automate complex procedures and processes, including scheduling, budgeting, CRM, and data mining tools. ➊ Rich experience in the financia, Insurance & healthcare domain, with particular expertise in Worker' Compensation & General Liability Insurance implementations. ➋ Medium to Large scale Insurance application developed for customers in states. ➌ Use of Recent Technology stacks to develop secure and robust applications. ➍ Have expertise with US Insurance systems and other regions as well. ➎ Documenting system for User Manual and effective training. Easy System upgrades. For the last few years, I’ve been experimenting with my job title, trying to find one that fits the kind of work I do regularly. Nothing has fit well or encompassed my full skill set and portfolio of work.
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    Gatsby.js
    Database Development
    AWS Lambda
    Flask
    PyTorch
    Data Access Layer
    MEAN Stack
    API Development
    Django
    RESTful Architecture
    TypeScript
    Python
    React
    Node.js
  • $35 hourly
    Experienced technical writer and SEO writer with a track record of increasing website traffic and boosting conversion rates, resulting in higher revenue for clients. Do you need help with technical content? With over two decades of experience creating technical documents that are accurate, easy to understand and get the point across, I can help you with your requirements. About Me I am an Electrical engineer with BS & MS degrees, with five years of freelance writing experience and over 16 years of experience in the telecommunication/data networking industry, designing and deploying wide-area networks for data/voice/video. What I do: 🏆 SEO-optimized content 🏆 Copywriting 🏆 YouTube Scripts 🏆 Research 🏆 Technical reports and presentations 🏆 User manuals 🏆 Editing and proofreading 🏆 Network design 🏆 Training material Tools I use: 🔎 Ahrefs / Surfer SEO ⌨️ Zendesk / WordPress 🎨 SnagIt, InDesign 🎙️ Descript 💬 Slack / WhatsApp / Telegram / Skype 📆 Asana CLIENT TESTIMONIALS "Faisal demonstrated a phenomenal attention to detail, punctuality, professionalism, and kindness for the duration of our project. He also brings a wealth of practical and theoretical knowledge on many tech topics." "Faisal was very responsive, did a great job on the materials provided and was very good about asking for feedback to improve his product. If we have more requirements of this nature in the future I would not hesitate to reach out to Faisal." "We have been delighted with the work from Mr. Faisal due to his go-to mindset. He has been great to work with and has put much effort into the work he has done. Every delivery has exceeded our expectations, and we would definitely recommend him for your content creation projects." "Faisal does great work. He is a skilled writer, and his grasp of marketing copy is excellent. I would highly recommend this freelancer for your next writing project." "Faisal was excellent to work with and quite responsive to our needs. He is a solid English writer." "Shaikh was a pleasure to work with and I highly recommend him for your proofreading, editing project. He is very polite, professional and offers editing ideas that improve and enhance your project. I would definitely use him again"
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    SnagIt
    WordPress
    Ahrefs
    Wireless Network Implementation
    Scriptwriting
    IT Infrastructure
    SEO Keyword Research
    Blog Writing
    Copywriting
    On-Page SEO
    SEO Writing
    Electrical Engineering
    Surfer SEO
    Technical Documentation
    Technical Writing
  • $13 hourly
    Multilingual Senior Technical Customer Agent Specialist and Voice-Over (Arabic, French, English) Greetings! I am a seasoned professional with expertise in providing top-notch technical customer support and delivering captivating voice-over services in Arabic, French, and English. As a Senior Technical Customer Agent, I excel in troubleshooting and resolving complex technical issues, ensuring customer satisfaction, and fostering positive client relationships. My extensive experience in voice-over work allows me to bring scripts to life with a versatile range of tones and emotions. Let me enhance your projects with my linguistic and technical skills, ensuring excellence and a memorable customer experience.
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    French to English Translation
    Customer Service
    Arabic to English Translation
    English to Arabic Translation
    Microsoft Word
    Microsoft Excel
    English to French Translation
    Customer Support
    Windows Administration
    Online Chat Support
    Email Support
    Arabic
    French
  • $26 hourly
    Hi, I have been working full-time remotely as a technical support specialist since 2015. I am proficient in French, Italian, and English, and can provide support via phone, chat, and email in these languages. I am passionate about learning new skills, particularly in Cybersecurity, and I am actively seeking opportunities in this industry. I hold several IT certificates and have successfully contributed to various projects, all of which are detailed on my Upwork profile. Feel free to reach out if you'd like to chat and determine if we would be a good fit for a future collaboration. Have a great day!
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    Cybersecurity Monitoring
    Linux
    Desktop Support
    In-App Support
    Desktop & Laptop Support
    End User Technical Support
    Helpdesk
    WordPress
    IT Support
    CompTIA
    Technical Support
    Email Support
    English
    French
    Italian
  • $70 hourly
    Over 25 years sales and marketing experience working at CEO, board level, senior corporate roles and consulting working in the UK, Belgium and Sweden covering the EMEA region. Helping SaaS, e-commerce, retail, tech, cybersecurity and professional service businesses to find their audience, target the right digital channels and communicate an impactful message. Previously worked for major brands and SME companies in Europe, the Middle East and Africa; for example Hertz car rental, Hilton hotels, Carlson Rezidor Hotel Group (Radisson Blu and Park Inn hotels). Specialising in lead generation, SEO, social media, PR, content creation, conversion optimisation, performance marketing, copywriting and strategy to get your business found, nurture leads and close sales. 2016 - 2023 HubSpot Partner Agency Certified / Solutions Partner 2016 - 2023 Google, HubSpot Inbound Certified, Email Certified, Inbound Sales Certified, Marketing Software Certified and HubSpot Content Marketing qualified. Services provided: 1. Product marketing - defining a target audience and their needs using buyer personas, mapping the buying journey, defining the buying lifecycle, providing market research, etc. 2. Inbound marketing - developing and executing a digital sales & marketing strategy to attract, generate and nurture your prospects, sales leads and customers. 3. Content marketing - providing a content strategy based on your target audience and a production plan to deliver the content in the frequency and format you need to keep prospects interested and customers happy. 4. Strategy - from GTM (Go-To-Market) to helping established businesses regain their "spark" and compete in the new digital economy.
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    Digital Marketing Strategy
    Content Marketing
    Customer Acquisition Strategy
    Copywriting
    B2B Marketing
    Marketing Strategy
    Branding & Marketing
    Brand Positioning
    Customer Relationship Management
    SaaS
    Startup Consulting
    Search Engine Optimization
  • $30 hourly
    I am a full-stack web developer with more than 7+ years of experience. My passion and drive are innovative, always being one step ahead within the field. I strive to be able to offer all services within the field and will do my best to help you. If you have any inquiries. Do not hesitate to contact me, I promise to make you satisfied with my work. Feel free to hire for: - Web Development + HTML, CSS, Javascript + ReactJS, Angular, VueJS, Redux, VueX, NextJs + NodeJS(Express, NestJs, Apollo GraphQL ....) + PHP (Laravel, WordPress, Drupal,...) + Python (Django, Flask,...) + Go (Echo, ...) + Docker - Database: MySQL, PostgreSQL, MongoDB - Amazon Web Services (EC2, Lambda, S3, DynamoDB, API Gateway, Cognito, Elastic Beanstalk, Amplify, Cloudwatch, ECR, SES, SQS, Cloudfront, Route53...) - Web Scripts - Stripe, Zoho Subscription - Troubleshooting and bug fix - API Development - OS: Linux, Windows, Mac OS X; - VCS: Git - Bug/Issue trackers: Jira, Redmine, Trello
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    Stripe
    NestJS
    PostgreSQL
    Next.js
    JavaScript
    Node.js
    MongoDB
    MySQL
    Vue.js
    React
    HTML
    CSS
    TypeScript
    GraphQL
    Amazon Web Services
  • $100 hourly
    I'm here to help you write great documentation for your software projects. The kind of docs that make readers say, "I love these docs!" My specialty is documentation for developer audiences: API docs, programming tutorials, and implementation guides. I also write research-based longform articles about technical topics. ## Experience Previously I worked at Grafana Labs. Specifically, I oversaw the docs for the load-testing tool, k6. These docs are well-loved in the developer community: I encourage you to read the k6 OSS docs, or search the G2 reviews for k6―just `ctrl+f` and type "docs". I care about users, readers, and design. I also have extensive experience as a freelancer for all types of projects. I was a teacher before I was a technical writer. And still I think of technical writing as a form of teaching. ## Technology Linux and open-source enthusiast. Decent scripting skills with JavaScript and Bash. Familiar writing Python and SQL. Experience with many major authoring tools and static site generators: Hugo, Gatsby, Docusaurus, Jekyll. Markdown, Asciidoc, and so on. Very comfortable with the OpenAPI (Swagger) spec. Comfortable and even enjoy the toil of testing an API and figuring out how things work and interconnect. I'm more of a scripter than a programmer, but I can dig through code and ask pointed questions.
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    Jekyll
    Swagger
    Technical Documentation
    Grafana
    Hugo
    API Documentation
    Technical Writing
    OpenAPI
    Bourne Shell
    Software Documentation
    Load Testing
    JavaScript
    Static Site Generator
    Markdown
    Linux
  • $13 hourly
    I'm an experienced Researcher with more than 10 years of practice. Worked with Cision as a Media Researcher where we collected data and corporate information of media people globally. I recently worked with Leadstage as a Junior Researcher doing data and lead enhancement for different companies. • Varied Research Topics • Lead Generation • Data Collection • LinkedIn • MS Office 365 • MS Tools • Business Development • Web/Data Scraping • Media Research • Petroleum/Energy Research • Government Research • Data Analysis • Site Curation • SEO • Leads Enhancement/Generation • Virtual Assisting • Market Research • B2B Marketing • Web Marketing • Data Mining • Data Extraction • Email List-Building • Prospect/Contact List Building
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    Business Development
    LinkedIn Lead Generation
    Niche Research
    Prospect Research
    Ecommerce
    Data Analysis
    Administrative Support
    Database Administration
    Translation
    Data Scraping
    Lead Generation
    List Building
  • $50 hourly
    ✅ Top Rated Full Stack Developer ⚛ 100% Job Success Score ⚛ 100+ Jobs Done ⚛ 4,000+ Hours Worked ✋I am a creative engineer with over 6 years of experience who loves to build slick products that work out perfectly. A proven history of creating cutting edge interface designs and information architectures for websites and mobile applications through a user-centered design process by constructing screen flows, prototypes, and wireframes. Can build WebApps, REST APIs, websites, integrations, and micro-services to help move your business forward. ✔ JavaScript (ES5/ES6/ES7+, Babel) ✔ ReactJS, React Native, Redux ✔ HTML5, CSS3 with LESS/SCSS, FlexBox , CSS Grid, SVG, animation ✔ UI/UX, responsive web ✔ Material UI, Bootstrap ✔ SQL, MongoDB, Firebase ✔ GraphQL, Docker ✔ Google Apps Script, PHP ✔ Webpack, npm, yarn, jQuery, etc... ✔ Git flow, Jira/Trello, Sketch, Figma I have professional experience working with clients one-on-one to achieve their goals. I pride myself on clear communication, quick response and project organization. 🎓 With a degree of Informatics Science and Computer Engineering.
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    Redux
    Web Development
    Front-End Development
    React Native
    Web Application
    Bootstrap
    WebRTC
    Mobile App Design
    Apps Script API
    React
    SQL
    MongoDB
    Node.js
    JavaScript
    Data Scraping
  • $75 hourly
    Innovative, passionate, and quick software developer and architect with deep knowledge of programming concepts and internals. 15+ years of hands-on industry experience in programming, designing, managing, & leading software projects & companies. Change agent, problem solver with a passion for technology; skilled in grasping the big picture, conceptualizing, developing & implementing solutions by partnering closely with business leaders. Worked for different type of industries, which includes Health-care Informatics, Lab Informatics, MOOC, Online Education, ERPs, Electronic Design Automation (EDA), Semi Conductor, Heavy mechanical manufacturing, Travel, Pharmaceutical & e-commerce. Skilled in: Python | PHP | Apex | Objective C | Java | C/C++ | Flex | ActionScript | JavaScript | Perl | VB6 iPhone SDK | Android SDK | BlackBerry SDK | Flex SDK | Sancha Django | Django REST | Odoo | Web2Py | Zope | Plone | edX | CodeIgniter | .NET | Java EE SQL Server | MySQL | PostgreSQL | Sybase | DB2 | SQLite | MS Access Odoo | OpenERP | Salesforce CRM | MS SharePoint git | SVN | CVS | VSS | Unfuddle Scrum | UP | UML | CASE Tools | Poseidon | Rambaugh OMT ASP.NET | ASP | Telerik Visual C++| MFC | Win32 | COM | DCOM | OLE | Multithreading ANT | JDK | Digester| Struts | Servlets | JSP | EJB | WebSphere | Eclipse Web 2.0 | AJAX | CSS | XML | XSD OpenSource | github Knowledge Management | MediaWiki | PHP Health-care Informatics | ICD9 | ICD10 | HIPPA | HL7 SEMI Standards | EFEM | SEMI E87 | SEMI E90 | SEMI E40 | Robotics | SECS/GEM | SCADA Customs ERP | Landing Cost | HS Codes | WTO Standards Lab Informatics | Bika | OLiMS | LiMS | LIS Windows | MacOS | Linux | Ubuntu | Unix | EC2 Windows CE | Micro Controller Programming | Dynamic C
    vsuc_fltilesrefresh_TrophyIcon Open Source
    Ehealth
    Mapbox
    Apache Hadoop
    LIMS
    Android
    iOS
    Odoo
    web2py
    Django
    Laravel
    Python
    PHP
    WordPress
    React
    JavaScript
  • $12 hourly
    I've been with the call center industry for almost four years and providing technical assistance is one of my expertise. We provide help to users from the United States by assisting them on how to fix their internet issues. A critical part of the job is not just providing technical assistance but also making customers feel that you care and understand their issues.
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    Email Communication
    HTML
    Technical Support
    PHP
    Adobe Photoshop
    Customer Service
    Visual Basic
    Email Support
  • $50 hourly
    Graduate in Electrical Engineering. Expertise in computer networking, cloud computing, IT and automation. Certificattions: Passed: AZ-305: Microsoft Certified Microsoft Azure Solutions Architect Expert Passed: AZ-104: Microsoft Certified Microsoft Azure Administrator Associate Passed: Azure DevOps Assessment (18473) I am a certified and an experienced azure cloud achitect and devops engineer. I assist with azure administration, creating azure architecures, azure migrations and azure devops. I have subject matter expertise in designing cloud and hybrid solutions that run on Microsoft Azure, including compute, network, storage, monitoring, and security. Have advanced experience and knowledge across IT operations, including networking, virtualization, identity, security, business continuity, disaster recovery, data platforms, and governance. Azure government cloud, migration from on-premise to azure cloud, from classic to ARM, Azure Virtual Desktop setup on azure and Office365 administration. AWS EC2, Elastic Kubernetes Service (EKS), ECR, RDS, IAM polices, backup, workmail, lambda, Serverless architecture, AWS automation. IaaC using Terraform, ARM templates, cheff/puppet for Azure and AWS. Vultr, OVH and digital ocean cloud resources management. Windows, SQL, MySQL and MariaDB server administration. Expertise with Linux distributions Centos, Ubuntu and Debian Container Management, kubernetes, docker/LXC containers. Web hosting using plesk, cpanel, webmin, apache and nginx. Web automation using selenium and nextcloud administration. Odoo administration and desiging templates for data migration. VPN and Proxy server setup and configurations. IPv6 and IPv4 bulk proxies creation scripts on linux servers. Mail Servers setup for bulk email sending and for organizations. Automation Tools: PowerShell, puppet, chocolatey, ansible, terraform, python, batch and bash scripts.
    vsuc_fltilesrefresh_TrophyIcon Open Source
    Microsoft Active Directory
    Automation
    Kubernetes
    Azure DevOps
    IT Management
    Windows Administration
    Amazon Web Services
    Terraform
    Cloud Architecture
    Cloud Migration
    Linux System Administration
    Microsoft Azure
    Microsoft Windows PowerShell
    Bash Programming
    Docker
  • $100 hourly
    I am a highly-skilled developer & data scientist/analyst with over 13 years of experience in the scientific/engineering domain. I use MATLAB for developing scripts and GUIs involving data pre-/post-processing, data extraction/transformation, image/video processing, object tracking, image/data acquisition, data analysis & visualization; Python for data analysis/visualisation (primarily the modules/libraries: Pandas, Numpy, & matplotlib), and for web scraping and automation (with urllib, requests, beautiful soup & selenium webdriver), Linux shell script (bash), Fortran 90, PHP, LaTex and LabVIEW extensively for my routine work and projects. I am also aware of the basic concepts of C/C++, Java, Perl, HTML, and CSS. I have been involved in several data science-based projects. I have extensive experience in this domain again using MATLAB (or Scilab/Octave) and Python. I have worked on several projects which require an expertise in data or image extraction (from web, formatted files, tables, etc.) or acquisition from a connected device (like sensors/cameras, etc.), data or image or video analysis (post-processing, transformations, filtering, auto ROI detection, object tracking, etc.), and visualisation in form of graphs, charts, 2-D/3-D plots, etc. I have also been actively involved in the development of standalone applications with a nice graphical user interface (GUI) for quick and easy data/image analysis.
    vsuc_fltilesrefresh_TrophyIcon Open Source
    LabVIEW
    Mathematics
    Data Analysis
    Bash Programming
    Automation
    Data Visualization
    GUI Design
    MATLAB Script
    Matplotlib
    MATLAB
    Data Scraping
    pandas
    Python
    PHP
  • $150 hourly
    Expert Vetted (top 1%) with 7 years of experience participating in all aspects of the complete software development lifecycle. My area of expertise is software architecture in diverse development platforms and leading development teams from concept to launch. I have • Led a team to rewrite a legacy monolith to modern stack microservices for a health and fitness startup. • Worked as a director of engineering for a NFT issuance and marketplace platform. • Built a prototype using AR kit for IOS • Done Metamask integration using web.js, solidity smart contract development, integration with crypto wallets on various websites • DevOps – build pipelines and server setup • Built algorithms for allocation of issuances and handling of issuance lifecycle for Sukuk Bonds. • Built a custom cloud-based KYC solution • Ensured 95% code coverage using mocha/chai/supertest • Automated data extraction processes for excel based reports • Built reusable components and front-end libraries for future use • Translated designs and wireframes into high quality code • Worked on multiple mapping solutions including google maps and ArcGIS/Esri I started working professionally during the last year of college and achieved the Top Rated Badge at Upwork before I graduated. SKILLS Here is a list of some of the languages/ platforms I have used in various projects. This is not an exhaustive list, so please contact me for details of my work in any other tech stacks • Node JS • React JS/Next.JS • Esri/ArcGIS • Postgre Sql • React-Native • Ruby on Rails • Flutter • Javascript • Angular • MongoDb • Shell Scripts * CI/CD Pipelines • Firebase • Mongoose • Android • Cordova • HTML • CSS • PHP • Java • DApp Development • Metamask • Smart contracts. • Python • .Net Core/web api • XML • Qt • Wt • Sqlite • Oracle10g • GitHub • Bitbucket • GitLab. • Zeplin • Invision • Figma • C • C# • C++
    vsuc_fltilesrefresh_TrophyIcon Open Source
    Golang
    Rust
    Blockchain Architecture
    Java
    React Native
    Android
    API
    Software Architecture & Design
    Database Architecture
    GraphQL
    React
    Node.js
    DevOps
    C#
    PHP
  • $40 hourly
    I'm a Mathematical Engineering (or Applied Mathematician) from Universidad EAFIT (Medellín, Colombia). My fields of expertise are Operations Research (Mathematical Optimization and Heuristics), Data Analysis and Data Science (Machine Learning and Analytics). I'm an expert MATLAB, Java, and Python Programmer.
    vsuc_fltilesrefresh_TrophyIcon Open Source
    Artificial Intelligence
    Algorithm Development
    Operations Research
    Mathematics
    Statistics
    Mathematical Optimization
    Optimization Modeling
    Mathematical Modeling
    Data Analysis
    Machine Learning Algorithm
    MATLAB
    Machine Learning
    Data Science
    Python
  • $10 hourly
    I have 3+ year of experience in Technical support for one of the largest corporations in world and providing technical support to one of the biggest retailing corporation. Beside technical support i am a beginner in programming, interested in Java, Java Script, HTML5, CSS and data bases. Highly familiar with Windows operating system and Unix with desire to upgrade my knowledge in many different directions. Always ready for new challenges and ready to provide the highest quality of work in any project i encounter.
    vsuc_fltilesrefresh_TrophyIcon Open Source
    Phone Communication
    Technical Support
    Microsoft Office
    Helpdesk
    Translation
    Computer Network
    Email Communication
    Customer Service
    Customer Support
  • $35 hourly
    ⭐⭐⭐⭐⭐ I've worked in Information Technology for over 20 years. I am excellent at: ✅ Technical Project Management ✅ Agile Methodologies ✅ Cloud Architecture (specializing in AWS) ✅ Technical Writing Currently, I hold a pivotal role as a Senior Technical Project Manager in a leading multinational software firm. My goal is to collaborate with forward-thinking clients and drive projects that align with their vision and business objectives.
    vsuc_fltilesrefresh_TrophyIcon Open Source
    Project Management
    Lean Manufacturing
    Cloud Architecture
    Leadership Skills
    Kanban Methodology
    Cloud Services
    Amazon Web Services
    IaaS
    Scrum
    Technical Documentation
    Software Architecture & Design
    Cloud Security
    Team Management
    Agile Software Development
    Technical Writing
  • $15 hourly
    If you are an Entrepreneur or a business that's looking for rapid growth, then I am the person you need to reach out to. Here's what one of the Industry leader course creators has to say: "I hired 5 researchers and Hina did the work of at least 3 of them combined. She is a machine -- with the most beautiful brain ever. Hire her, trust me. She will not only do your research... she will improve your ideas, if you are open to that obviously. I was open to that, and she rolled with it and developed my idea into EVERYTHING AND MORE that I asked for and expected. Now it's my job to write my article, and instead of that being a daunting task, I have everything I need at my fingertips. Thank you Hina. I'm so happy to have met you, and as you know, already have an open hourly contract to send you all my research work and maybe more!" I help business owners and startups achieve their community and business goals quickly by offering Customer Support, Administrative and Operational Assistance, Content Creation, Transcription, Data Entry, and Social Media Community Management solutions. Online research is what I do professionally on a regular basis and as a passion. I can help you get organized and reach your goals. I am a strong team leader, an excellent team player, a multi-skilled professional with an attitude of getting things done! I'm also a quick learner and have extensive experience in using/utilizing Zendesk, Helpscout, Microsoft Excel, Slack, Google Docs, LinkedIn (Sales Navigator), and a variety of other applications. Upon accepting a project, I guarantee to accomplish all requirements. I am always committed to meet deadlines and leave clients completely satisfied. If you are looking to complete your project in the most efficient manner, please drop a message. I'd love to learn more about your project. Feel free to invite, and I promise I will reach out right away!
    vsuc_fltilesrefresh_TrophyIcon Open Source
    Data Management
    Research & Development
    Community Management
    Data Entry
    Online Market Research
    Content Creation
    Content Writing
    Customer Service
    Social Media Management
    Automation
    Sales & Marketing
    Lead Generation
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How to Hire Top Open-Source Developers

How to hire open-source developers

It may seem counterintuitive to release your intellectual property to the masses for free, but open sourcing your software can help you attract top talent, bolster your branding, help your product gain market share as a platform, and leverage the collective experience of a global community of passionate developers.

So how do you hire open-source developers? What follows are some tips for finding top open-source consultants on Upwork.

How to shortlist open-source development professionals

As you’re browsing available open-source development consultants, it can be helpful to develop a shortlist of the professionals you may want to interview. You can screen profiles on criteria such as:

  • Technology fit. You want an open-source developer who understands the technologies you wish to open source.
  • Project experience. Screen candidate profiles for specific skills and experience (e.g., open sourcing a Python machine learning library on GitHub).
  • Feedback. Check reviews from past clients for glowing testimonials or red flags that can tell you what it’s like to work with a particular open-source developer.

How to write an effective open-source development job post

With a clear picture of your ideal open-source developer in mind, it’s time to write that job post. Although you don’t need a full job description as you would when hiring an employee, aim to provide enough detail for a contractor to know if they’re the right fit for the project.

Job post title

Create a simple title that describes exactly what you’re looking for. The idea is to target the keywords that your ideal candidate is likely to type into a job search bar to find your project. Here are some sample open-source development job post titles:

  • Need help open sourcing our material component library for Vue.js
  • Need help managing an open-source C++ library on GitHub
  • Building an open-source image-recognition library with TensorFlow

Open-source development project description

An effective open-source job post should include: 

  • Scope of work: From GitHub listings to feature development, list all the deliverables you’ll need. 
  • Project length: Your job post should indicate whether this is a smaller or larger project. 
  • Background: If you prefer experience with certain industries, software, or developer tools, mention this here. 
  • Budget: Set a budget and note your preference for hourly rates vs. fixed-price contracts.

Open-source developer responsibilities

Here are some examples of open-source developer job responsibilities:

  • Design and develop open-source software
  • Host and maintain open-source projects on a remote repository (e.g., GitHub, Bitbucket, GitLab)
  • Write and maintain open-source documentation (e.g., README, contributing guidelines, code of conduct)
  • Monitor and handle bug reports, feature suggestions, contributor comments, and questions 

Open-source developer requirements and qualifications

Be sure to include any requirements and qualifications you’re looking for in an open-source developer. Here are some examples:

  • Application-specific programming language (e.g., C# for ASP.NET) 
  • Software development methodologies (e.g., Agile, Scrum, XP)
  • Familiarity with the SDLC (from requirements gathering to deployment and maintenance)
  • Code documentation

Open-Source Developers FAQ

What is open-source development?

Open-source development is the practice of releasing software source code to the public. Source code released under an open-source license can legally be inspected, copied, shared, altered, and extended by anyone who follows the terms of the open-source license agreement. 

More broadly, open source reflects an altruistic philosophy of collaboration and sharing, permitting people to modify source code and incorporate those changes into their own projects. 

How much does it cost to hire an open-source developer?

The first step to determining the cost to hire an open-source developer will be to define your needs. Rates can vary due to many factors, including expertise and experience, location, and market conditions.

Cost factor #1: project scope

The first variable to consider when determining scope is the nature of the work that needs to be completed. Not all open-source projects are created equal. Open-sourcing a simple web service will typically take less time than launching a new open-source web development framework. 

Tip: The more accurately your job description describes the scope of your project, the easier it will be for talent to give you accurate cost estimates and proposals.

Cost factor #2: open-source developer experience

Choosing the right level of expertise for the job is closely tied to how well you determined the scope of your project. You wouldn’t need an advanced programmer to maintain the code documentation and maintenance of your open-source project listing on GitHub. On the other hand, building an open-source software development platform from scratch will require a skilled programmer. 

Beyond experience level, you need to consider the type of experience the talent possesses. Generally speaking, an open-source developer is any developer familiar with the process of hosting a project on a remote repository such as GitHub, GitLab, or SourceForge. The following table breaks down the rates of the typical types of open-source developers you can find on Upwork. 

Rates charged by open-source developers on Upwork

Type of Developer

Description

Hourly Rate

Web development

Front-end development (e.g., HTML, CSS, JavaScript). Back-end development (e.g., databases, web servers, cloud storage). Experience with CMSs (e.g., WordPress), JavaScript frameworks (e.g., React), and/or app-specific frameworks (e.g., WooCommerce).

$30-120+

Mobile development

iOS app development (e.g., Swift, Objective-C, Xcode, Cocoa Touch). Android app development (e.g., Java, Kotlin, Android SDK, Android Studio). Hybrid app development (e.g., Flutter, React Native, Ionic).

$30-120+

Embedded systems

Programming languages (e.g., C, C++, Rust). Experience programming microcontrollers (e.g., Arduino), microcomputers (Raspberry Pi), and other hardware. Robotics, IoT, and operating-system-level code. 

$50-120+

Cost factor #3: location

Location is another variable that can impact an open-source developer’s cost. It’s no secret that you can leverage differences in purchasing power between countries to gain savings on talent. But it’s also important to factor in hidden costs such as language barriers, time zones, and the logistics of managing a remote team. The real advantage to sourcing talent remotely on Upwork is the ability to scan a global talent pool for the best possible person for the job. Location is no longer an obstacle. 

Cost factor #4: independent contractor vs. agency

The final variable regarding talent cost is hiring an independent contractor vs. an agency. An agency is often a “one size fits all” model, so you’ll often have access to a designer, a project manager, an engineer, and more. When hiring individuals you have total autonomy regarding who is responsible for which part of the project, but you’ll need to source each of those skills separately.

The trade-off between hiring individuals vs. hiring an agency is the level of administrative overhead you incur personally in coordinating tasks among all members of the team. Project scope and personal preference will determine which style is a better fit for your needs.

Open-Source Developer Tips and Best Practices

Choose the right open-source license for your needs

MIT, Apache 2.0, and GPLv3 are examples of other open-source licenses. Using a license is as simple as copy-and-pasting it into your repository. Open-source licenses differ from typical intellectual property licenses in that their goal is to help others contribute to and use your work without needing to seek special individual permission to do so. That said, these licenses still place restrictions on how source code can be copied, used, and distributed, usually to discourage abuse of the open-source license (e.g., someone charging others for free code you developed). 

For example, the GNU General Public License (GNU GPL) allows unlimited copying, distribution, and changes to the source code. You can even charge someone for software built partially with technologies open sourced under the GNU GPL, but only if you provide a copy of the GNU GPL so that others can see which part of your code is technically open source and available for free. This also gives you a chance to justify why you’re charging for your fork of the original source code. 

Write clear contributing guidelines

Maintaining an open-source project on a remote repository will of course become more challenging as more people become interested in your project. It helps to have clear guidelines for how developers can contribute to your project. You can include these guidelines in a README file along with your project description or in a separate CONTRIBUTING file. 

Contributing guidelines should communicate expectations for contributors such as:

  • Procedure for submitting a new feature suggestion
  • Bug report best practices
  • How to set up a test environment for a new feature
  • Types of contributions you’re looking for
  • Project roadmap
  • Contact information

The more detailed your CONTRIBUTING file, the easier it will be to manage your open-source project. 

Don’t forget to include a code of conduct

If your goal is to build a community around your open-source project, adopting a formal code of conduct can go a long way toward encouraging the type of behavior you wish to see within this new community. 

A code of conduct usually provides guidelines for how contributors and community members should interact with one another. You can establish community standards such as:

  • Demonstrating empathy and kindness toward others
  • Offering constructive criticism and receiving it gracefully
  • Abolishing derogatory language and harassment 

A code of conduct will give you a handy tool to use to moderate discussions about your project in your online communities. You can enforce it by banning offenders and removing comments on the grounds of violating your code of conduct. 

Don’t want to write your own code of conduct? There are plenty of drop-in open-source code of conduct documents available on the web (e.g., Contributor Covenant, Citizen Code of Conduct). Copy and paste the one that best suits your needs. 

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