BITFIT LABS PTE LTD is hiring a

Senior Blockchain Engineer

• Design and develop smart contracts, blockchain integrations, and Web3 infrastructure
• Build backend services interacting with EVM and non-EVM chains
• Develop secure wallet, DeFi, exchange, and staking-related systems
• Optimize smart contract performance, gas efficiency, and security
• Participate in architecture design, code reviews, and technical discussions
• Collaborate with frontend, backend, mobile, DevOps, and QA teams
• Troubleshoot blockchain node, RPC, indexing, and transaction-related issues

• 3+ years of experience at blockchain/Web3 companies
• Strong understanding of blockchain architecture and decentralized systems
• Experience with Ethereum, EVM chains, and smart contract development
• Proficiency in Solidity and at least one backend language (Node.js, Go, Rust, Python, etc.)
• Experience integrating wallets, exchanges, DeFi protocols, or blockchain infrastructure
• Knowledge of security best practices and common smart contract vulnerabilities
• Familiarity with RPC nodes, indexing, event listeners, and transaction lifecycle
• Experience using Git, CI/CD, Docker, and cloud infrastructure

3. Preferred Qualifications

• Experience with Layer2, cross-chain, or account abstraction technologies
• Experience auditing or optimizing smart contracts
• Familiarity with non-EVM ecosystems such as Solana, Cosmos, or TON
• Open-source contributions or public blockchain project experience

4. Work Conditions

• Fully remote
• Full-time / Part-time / Contract / Freelance available
• Flexible global team environment
• Compensation via PayPal, bank transfer, or cryptocurrency