Solidity Blockchain Developer (Part-time)

Engineering remote

4IRE Group is a Swedish-Ukrainian holding company providing software development outsourcing and world-class tech & business consulting in Blockchain, Fintech, and Green Finance. Leveraging 13+ years of experience on the market, we build ready-to-go Web 3.0 and Fintech solutions to help our clients speed up market entry and outperform their competitors who build products from scratch.

We are looking for a Solidity Blockchain Developer on a part-time basis to help improve progress on current projects.

We expect you to have:

  • 2+ years of experience with Solidity, smart contracts development, work with Metamask, web3;
  • Familiarity with ERC-20, ERC-721;
  • Familiarity with Truffle or Hardhat frameworks;
  • Experience with Upgradeable;
  • Experience with OpenZeppelin;
  • Blockchain Development experience Node.js, blockchain-related services, unit tests;
  • English — Intermediate+;
  • Previous DeFi background will be a plus.


  • Develop Smart Contracts and cover contracts with unit tests.
  • Collaborate with other engineers, product managers, and other internal/external teams to maintain a high-quality code in a fast-paced environment.

We offer:

  • Fast-growing FinTech and Blockchain oriented company;
  • Possibility to learn and to teach;
  • Competitive salary depends on the background;
  • Participation in open-source projects;
  • Participation in tech conferences, events, and hackathons;
  • Flexible hours, remote work possibility.