Senior Fullstack Engineer

You will build Go backend services and responsive React applications for wallet, marketplace, and Web3 products. You will implement account-abstraction and smart-contract flows, real-time blockchain features, transaction tracking, admin tools, tests, and API documentation. You will integrate wallet SDKs, blockchain services, and cross-platform web and mobile components.

Responsibilities

• Develop Go services for wallet operations and blockchain interactions
• Implement ERC-4337 user-operation flows with bundlers and paymasters
• Build smart-contract interaction layers using generated Go bindings
• Implement account-abstraction support, gas sponsorship, and session keys
• Design BFF services for blockchain data and wallet infrastructure
• Build responsive React and Next.js applications
• Implement embedded-wallet authentication and passkey flows
• Build Web3 interfaces using wagmi and viem
• Implement transaction-confirmation and EIP-712 signing flows
• Develop WebSocket-based blockchain-event features
• Build cross-platform components for web and React Native
• Implement transaction tracking, reorganization handling, and notifications
• Create Web3 operations admin panels
• Write backend and frontend tests
• Document APIs with OpenAPI and Swagger

Requirements

• 3+ years of commercial Go experience
• REST API design and implementation skills
• Experience with MongoDB or PostgreSQL
• Knowledge of microservices architecture
• 3+ years of React and JavaScript or TypeScript experience
• Experience with Redux, Zustand, or similar state-management tools
• Responsive-design and CSS-framework experience
• Knowledge of web performance optimization
• Experience with Git and CI/CD
• Experience with Docker and containerization