Juan Manuel O.
Sherbrooke, Canada
100%
Job Success
Blockchain and smart contract developer
$60.00/hr
Blockchain developer since 2020.
- Smart Contracts writing and testing.
- Descentralized Applications.
- NFTs and Marketplaces.
- Tokens.
- Web3 integration.
- APIs
- Solidity
- Web3, Ethers
- Hardhat, Truffle,
- JavaScript
- React
- NodeJs
- Ethereum and EVM Blockchains.
- ERC721, ERC1155, ERC20
Blockchain is evolving really fast, so I'm working, learning and improving everyday to stay up to date.
If I don't know the answer to a problem, I will dive into the documentation and come back with a solution.
Let's discuss your project and start working together.
Work history
I Need an ERC-1155 and an ERC-721 Solidity Smart Contract To Mint NFT Project
5.00
Oct 11, 2021
-
Jan 23, 2023
Private earnings
Solidity Smart Contract Modifications
5.00
Aug 3, 2022
-
Aug 11, 2022
"Juan is great and really really fast. Got the job done and went beyond being great at it."
Private earnings
React/Web3 Developer Needed
Sep 11, 2021
-
Mar 22, 2022
No feedback given
Private earnings
NFT Smart Contract OpenSea Collection
Sep 22, 2021
-
Feb 4, 2022
No feedback given
Private earnings
NFT Minting
5.00
Oct 7, 2021
-
Oct 21, 2021
"Communicates well, and does what he says."
Private earnings
Blockchain/Web3 Developer available immediately
Aug 29, 2021
-
Sep 13, 2021
No feedback given
Private earnings
Web UI for issuing ERC20 tokens
Aug 21, 2021
-
Sep 13, 2021
No feedback given
Private earnings
Connect Blockchain code to webpages
5.00
Aug 6, 2021
-
Sep 11, 2021
"Probably the BEST Upwork contractor i EVER Hired, no delays, faster than ANY previous contractors trying to do the same thing, and very knowledgeable... Manu is AMAZING"
Private earnings
Simple Solidity Contract - Easy for Experienced Developer
Aug 14, 2021
-
Sep 11, 2021
No feedback given
Private earnings
Ethereum and solidity developer for very small demo project
5.00
Aug 20, 2021
-
Sep 11, 2021
"Juan is great freelancer & really goes out of his way to solve problems. I really enjoy working with him."
Private earnings
Solidity Bulk Transfer Contract
Aug 12, 2022
-
Present
Job in progress
Private earnings
Blockchain web3 smart contracts (interesting NFTs)
Aug 8, 2022
-
Present
Job in progress
Private earnings
React/Web3 Developer Needed
Apr 19, 2022
-
Present
Job in progress
Private earnings
Create NFT on blockchain for me and connect minting button/wallet on website
Oct 18, 2021
-
Present
Job in progress
Private earnings
Add NFT Minting System to React Web App - Blockchain - Smart Contracts
Oct 2, 2021
-
Present
Job in progress
Private earnings
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Skills
- DApps
- Smart Contract
- Solidity
- web3.js
- Blockchain Architecture
- Blockchain Development