Job Description
We are seeking a backend and infrastructure-focused engineer to build production systems for Web3 protocols. You will own end-to-end critical systems, from on-chain events, indexers, APIs, and background workers to data pipelines, cloud infrastructure, real-time data streams, AI agent orchestration, and necessary frontend delivery. This is not just a backend role writing APIs—you will be responsible for the full lifecycle of system stability, performance, and maintainability, including architecture design, implementation, deployment, monitoring, troubleshooting, and continuous iteration.
Key Responsibilities
- Backend Systems & Architecture: Design, build, and maintain core protocol backend systems, including indexers, APIs, background workers, data pipelines, and internal services. You will independently own the architecture, implementation, deployment, monitoring, and iteration of specific systems.
- Cloud Infrastructure & Operations: Manage cloud infrastructure for services, deploying, scaling, and operating production systems on AWS or GCP, including containers, queues, caching, databases, CI/CD, logging, monitoring, alerts, and cost control.
- Real-Time & Multi-Chain Systems: Build systems to push on-chain state to clients in real-time, including WebSocket, price streams, transaction streams, and live dashboard data. When scaling to multiple EVM chains, coordinate indexers, RPC infrastructure, and cross-chain state to ensure low latency, consistency, and clear fallback mechanisms.
- AI Agent Infrastructure: Develop and maintain backend infrastructure for AI agents, supporting developers, on-chain inference workflows, and internal automation. You will handle LLM APIs, tool-calling loops, agent skill execution, logging, monitoring, and reliability controls.
- End-to-End Feature Delivery: Deliver product features across the full stack—from on-chain events to indexers and APIs, then to React/Next.js frontends. Features may include trading flows, launch processes, token pages, live dashboards, wallet connections, and transaction UX.
- AI Skill Optimization: Beyond using AI agents, you will develop, fine-tune, and optimize agent skills for external developer support and internal engineering workflows.
Job Requirements
- Bilingual Proficiency: Fluent in both written and spoken English and Chinese for effective communication with internal teams and global developer communities.
- Backend Expertise: Strong production-level backend development experience in TypeScript/Node.js (Rust or Go is a plus). Deep knowledge of PostgreSQL, Redis, message queues, background tasks, caching strategies, and high-load system design.
- Cloud Infrastructure: Hands-on AWS or GCP production experience with Docker, Kubernetes (or similar), deployment, scaling, CI/CD, logging, monitoring, alerts, and cost control.
- Web3 Backend Experience: Production experience with on-chain data systems (indexers, event listeners, RPC coordinators, transaction submitters). Understand trade-offs between eth_getLogs pagination, subgraph queries, third-party APIs, and custom indexers.
- Frontend Delivery: Practical React/Next.js/TypeScript skills to render clean, stable UIs with real-time data—no need to be an expert, but must not rely entirely on others.
- AI Workflow Skills: Daily use of AI coding tools (Cursor, Claude Code, Codex, etc.) and experience with LLM APIs, tool-calling, agent workflows, and production AI systems.
- Security Awareness: Proactive focus on rate limiting, input validation, auth, wallet security, abuse prevention, and edge cases like pending/reverted transactions.
- Timezone Alignment: Stable availability covering Europe to APAC (latest UTC+9).
- Startup Mindset: Adaptability to rapid iteration, strong ownership, occasional on-call, and prioritizing builder/developer needs.
Nice-to-Haves
- Smart contract experience (Solidity reading/writing/auditing).
- EVM internals knowledge for safe contract-interacting backend systems.
- Production indexer experience for high-throughput chains (BNB Chain, Base, Solana).
- Production-level agentic AI systems (beyond prompt engineering).
- High-concurrency, high-availability, low-latency system experience.
- Deep Web3 frontend skills (wagmi/viem/ethers, wallet connections, transaction signing).
- Contributions to Web3 OSS (indexers, wallets, block explorers, frontend SDKs).
- Background in Web3 infrastructure, exchanges, or wallet companies.
Benefits
Negotiable
