Senior Blockchain Engineer

Qualifications and requirements

• 3+ years of professional software development experience in Web3
• Deep understanding of the Ethereum Virtual Machine (EVM).
• Proven experience building and deploying 1+ blockchain-based platforms with cross-functional teams.
• Strong understanding of gas optimization, storage layout, and low-level opcodes.
• Fluency in English (written and spoken).

Projects

Twenty Four 7 is hiring a Senior Blockchain Engineer to join a dedicated engineering team working on a Web3 staking and digital-asset platform for an external client.

The platform will integrate blockchain-based staking, token utilities, NFT assets, and Web3 game assets. The engineer will work closely with frontend, backend, QA, DevOps, and product team members to design, implement, test, and deploy production-ready blockchain functionality.

This is a project-specific role focused on building and scaling the platform's smart-contract infrastructure and blockchain integrations.

What You'll Build

• Web3 decentralized applications
• DeFi and staking platforms
• On-chain gaming ecosystems
• NFT and token-based applications
• Cross-chain integrations
• Scalable blockchain backend services
• Modern frontend Web3 applications

Job functions

• Blockchain Development, ensuring code quality, scalability, and performance.
• Review Solidity code for security, gas efficiency, and readability.
• Collaborate with frontend, QA, and product teams to deliver production-grade dApps and backend services.

Conditions

• Fully remote work from anywhere in the world
• Flexible working hours
• Work on innovative Web3 and blockchain products
• Collaborate with an experienced international engineering team
• Long-term career growth opportunities
• Competitive compensation based on experience

If you're excited about building the next generation of decentralized technologies, we'd love to hear from you.
Apply today and become part of a team shaping the future of Web3.

Desirable skills

• Experience with gRPC / REST API integrations.
• Knowledge of Zero-Knowledge (ZK) tools — Circom, SnarkJS.
• Familiarity with audit tools like Slither, MythX, or Echidna.
• Ability to read and analyze external smart contracts (DeFi, NFT, or DAO).