Company Overview & Vision
Founded in Singapore in April 2026, CITA Lab is a dynamic software development startup dedicated to building high-quality, custom blockchain-related products tailored specifically to our customers' requirements. Our diverse product lineup includes centralized/decentralized cryptocurrency exchange solutions, secure crypto wallets, smart contracts, dApps, and more. We turn complex blockchain capabilities into seamless, secure, and intuitive user experiences for clients worldwide.
1. Responsibilities
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
2. Requirements
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