Web3 / Blockchain Developer – Smart Contracts & Cross-Chain Protocols | Remote

 Contract Position | 20+ hours per week | Competitive Hourly Rates

What You’ll Do

You will be part of the engineering team developing and optimising smart contracts and cross-chain interoperability layers powering a large-scale multi-chain wallet ecosystem. You’ll work across blockchain networks, bridge protocols and interoperability frameworks to enable seamless cross-chain communication and asset movement.

You will:

• Design, build, test and deploy smart contracts across EVM-compatible blockchains

• Develop cross-chain routing and interoperability logic powering multi-chain connectivity

• Integrate on-chain transactions, RPC communication and Web3 library tooling

• Conduct security reviews and optimise smart contracts for performance and gas efficiency

• Monitor and validate cross-chain transactions, events and proofs

• Collaborate with backend and platform teams to deliver secure and verifiable wallet operations

• Support documentation, audits, technical reviews and open-source contributions

• Participate in security programs, bug bounties and protocol optimisation initiatives
  
  

What You’ll Have

• 3–5+ years blockchain or smart contract engineering experience

• Strong proficiency with Solidity, Rust, Node.js and smart contract development patterns

• Hands-on experience deploying smart contracts to production environments

• Familiarity with Web3.js/Ethers.js, Hardhat, Foundry or Truffle toolchains

• Practical experience working with Ethereum, BNB Chain, Polygon or similar EVM networks

• Understanding of blockchain RPCs, event listeners and wallet signing flows
  Good knowledge of version control (Git), CI/CD and engineering best practices
  
  

Nice to have

• Experience with cross-chain bridges, interoperability protocols or liquidity routing networks

• Familiarity with BTC, Tron, Polkadot or ZK-based blockchain ecosystems

• Experience with oracle / relayer systems and multi-chain token models

• Prior involvement with external auditing firms or open-source contributions

• Passion for decentralised architecture and scaling distributed networks
  
  

What’s In It for You

• $60 – $85 USD per hour, depending on expertise

• Flexible remote working with global engineering teams

• Bi-weekly billing & fast payments via USDT, USDC or USD bank transfer

• Minimum 20 hours per week

• Performance + availability + retention bonus opportunities

• Initial 6-month contract with extension options up to 3 years

• High-impact role shaping the future of cross-chain interoperability
  
  

Interested?

Revive Recruitment are managing the process exclusively.
If you’d like more details, please send your CV and portfolio / GitHub link.