Senior Blockchain Engineer

We are hiring a Senior Blockchain Engineer to build and maintain blockchain-related systems: smart contracts, integrations, and backend services that connect to on-chain and off-chain components. You work with product and engineering on delivery, security, and stable releases. **What you’ll do** - Design, implement, and review smart contracts and protocol integrations - Build and maintain services that interact with blockchains (RPC, indexing, wallets) - Write tests and support deployments on testnet and mainnet - Debug transaction failures, gas issues, and integration bugs - Document APIs, contracts, and deployment steps for the team - Join code reviews and help junior engineers when needed **What we’re looking for** - 4+ years in software engineering; 2+ years hands-on with blockchain - Solid experience with Solidity (or similar) and common EVM patterns - Understanding of security basics: reentrancy, access control, upgrades - Comfort with JavaScript/TypeScript or Go/Rust for backend/integration work - English for daily work with engineering and product **Nice to have** - DeFi protocols, multisig, oracle integrations - Hardhat/Foundry, CI/CD for contracts **Compensation** - $180,000–$250,000 per year, depending on experience and location (details discussed at interview)