Web3 + Full Stack Engineer

**Web3 + Full Stack Engineer** **Location:** **Remote** **About the role** We're building Web3 payment infrastructure that lets users and merchants move value across multiple blockchains. We're looking for a Web3 + Full Stack Engineer who can own features end-to-end — from on-chain integration through backend services to the user-facing product. **What you'll work on** - Build and maintain integrations with multiple blockchains (e.g. Bitcoin, Ethereum and other EVM chains) — transaction construction, broadcasting, and confirmation handling. - Write, test, and deploy smart contracts (Solidity or equivalent) for deposits, withdrawals, and on-chain logic. - Design and build backend services and APIs — ledger logic, merchant payment endpoints, webhooks — that connect on-chain activity to the rest of the product. - Build frontend features for the wallet, merchant dashboard, or checkout flows (React or similar), consuming the APIs and on-chain data you build. - Own features across the stack: from a contract or chain integration through the API layer to the UI a user or merchant actually touches. - Write tests covering blockchain-specific edge cases (chain reorgs, stuck transactions, gas estimation) as well as standard backend/frontend test coverage. - Monitor and maintain blockchain nodes and related infrastructure as needed. - Collaborate with product, design, and security on features that handle real funds. **What we're looking for** **Must-have** - Experience building on at least one major blockchain platform (Ethereum/EVM, Bitcoin, Solana, etc.), including writing and testing smart contracts if EVM-based. - Solid understanding of blockchain fundamentals: wallets, transactions, gas/fees, confirmations, and finality. - Full-stack development experience: backend (Node.js, Go, Python, Rust, or similar) and frontend (React or similar), building and consuming APIs across both. - Understanding of common security pitfalls in Web3 development (reentrancy, front-running, key management, etc.). - Comfortable working with Git, CI/CD, and standard software engineering practices. - Ability to work independently across the stack without needing every layer handed off by a specialist. **Nice-to-have** - Experience with multi-chain integrations (more than one blockchain in production). - Familiarity with wallet SDKs, RPC providers, or indexing tools (e.g. The Graph). - Experience with payment systems, exchanges, or custodial platforms. - Exposure to Layer 2s, cross-chain bridges, or account abstraction. - Mobile development experience (iOS/Android), if the product includes a mobile wallet. - Contributions to open-source Web3 projects. Pay: ₦1,000,000.00 - ₦2,800,000.00 per month Work Location: Remote