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James H.

Senior FullStack Engineer

Works remotely from Remote

  • 43.00595
  • -123.89259
  • Suggested rate €500 / day
  • Experience 7+ years
Propose a project The project will begin once you accept James's quote.

This freelancer is available full-time but hasn't confirmed their availability in over 7 days.

Propose a project The project will begin once you accept James's quote.

Location and workplace preferences

Remote, OR, USA
Remote only
Primarily works remotely


Project length
  • Between 1-3 months
  • Between 3-6 months
  • ≥ 6 months
Business sector
Digital & IT
Company size
  • 1 person
  • 2-10 people
  • 11 - 49 people
  • 50 - 249 people
  • 250 - 999 people
+2 autres


Freelancer code of conduct signed
Read the Malt code of conduct

Verified email


  • Cantonese

    Native or bilingual

  • English



Skills (14)

James in a few words

I've worked in software engineering for my entire over 15-year programming history since childhood.
I am senior level full-stack software engineer.
I have over 8 years of experience in freelancing, part-time , contract developer in software industry, Especially in Web / Mobile / Desktop software development, Crypto Currency related products like DAO, DEFI, NFT.
As a software engineer I always have creative and innovative mind behind programming & design software architecture.
People usually asks me, “What is your expertise? Web ? React ? Ruby or Blockchain ?” , then I usually say that “Not only sth, my expertise is programming :)”



BlockChain Engineer & Back-end & Front-end Developer

January 2019 - December 2021 (2 years and 11 months)

Building Ethereum Platform based Smart Contract using Solidity. Building Solana Platform based Smart Contract using Rust Converting 3omb smart contracts (Solidity) to Rust Blockchain security management & Researching black holes in smart contracts. Developing back-end API for wallet, mining. (Ruby on Rails) Developing front-end web pages and all components with Typescript (React + Redux)

Alethea AI

Full-Stack Coin Developer

United States

March 2018 - December 2018 (9 months) Front-End Development using React + Redux / WebGL Implement Components with Typescript Creating iNFT characters – Python Scripting Training iNFT Earning (Buy & Sel) iNFT Web Wallet API bases on MetaMask / Coinbase / Gnosis Market Explorer Whitepaper


Senior React Developer  - As a freelancer

November 2015 - August 2016 (9 months) Build whole front-end pages with Typescript and components from the Scratch. Build reusable components for responsive design. Work with back-end REST API.

Melhor Envio

Full-Stack Web Developer  - As a freelancer


May 2015 - August 2015 (3 months) Cooperate with designers to create clean interfaces and simple, intuitive interactions and experiences. Complete detailed programming and development tasks for front end public and internal websites as well as challenging back-end server code. Carry out quality assurance tests to discover errors and optimize usability.