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John
Helard
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22
Finished gigs
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Website
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Specialization
full stack || blockchain
Hourly rate
$40/hr
Preferred payment options
ETH
USDT
TIME
AUDT
USDC
DAI
WBTC
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BTCB
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About me
I am a blockchain developer with 5 + years of rich experience. As a blockchain developer, I have experience working with CEX, DEX, token management systems, loyalty point system, DEFI, DAO, NFT marketplace, betting games with smart contracts that provide liquidity for investors. I'm also experienced at writing upgradeable smart contracts, test-driven development for scalability and security. I am also doing web development and mobile development. Most experience in PHP, Node.js, AngularJS, ReactJS, React Native, Golang and Database design. I am innovative and strategic thinking professional with a proven track record of consistently going above and beyond in meeting customer needs and providing more value to the product than what the customer is paying for. For this reason, they always get back to us again and again with promising ideas and projects. The world will see the great result from my hands.

Work experience

Nextway Software A/S
September 2015 – July 2020
Job title
Blockchain developer
Work experience & achievements

I worked as a Blockchain developer in this company for 5 years with mydesigner. - Development smart contracts, Ethereum-based programs withtracking of certain conditions and usage of cryptocurrency. - Used solidity, Rust, Reach, web3.js, ethere.js - With Remix, Truffle e, Hardhat to compile and deploy our smartcontracts. - Ethereum-based programs with tracking of certain conditions and usage of cryptocurrency. - Ethereum, Solana, Polygon, BSC, Algorand, Cosmos, Elrond, etc.

SAS
September 2020 – August 2022
Job title
Web developer
Work experience & achievements

Designing web and mobile apps mockups using Adobe XD. Designed andbuilt the company website using React. Bringing mock-ups to life using HTML, CSS, Bootstrap, JavaScript, and React that are responsive and usable. Make changes to already existing WordPress sites using Divi builder. Optimizing website performance using Lighthouse and rectifying front-end-related issues. And develop the Backend-API and the Backend-API as well.

Education

Technical University of Denmark
Graduation year: 2015
Level of study
Bachelor
Major / Field of study
Computer Science