Backend Engineer

Design and build the core backend systems powering SwapRail, including APIs, routing engines, execution services, and data pipelines.

## Responsibilities

Design and implement scalable backend services and APIs Build routing and aggregation logic for swap execution across multiple liquidity sources Integrate on-chain and off-chain data sources (RPC nodes, indexers, third-party APIs) Develop simulation and validation layers for transaction execution Optimize system performance for low-latency and high-throughput scenarios Design data models for quotes, routes, transactions, and execution states Implement monitoring, logging, and observability across services Collaborate with wallet and frontend teams to ensure consistency in execution flows

## Requirements

Strong experience with Node.js / TypeScript / Go / Rust Experience building high-performance backend systems Strong understanding of asynchronous systems and concurrency Experience with PostgreSQL and data modeling Familiarity with microservices architecture and distributed systems Experience integrating blockchain data or Web3 systems

## Nice to Have

Experience with DeFi protocols or aggregators (1inch, 0x, Uniswap) Experience building trading or execution systems Experience with blockchain indexing (The Graph, custom indexers) Understanding of MEV, routing optimization, and slippage control Experience with caching layers (Redis) and performance optimization

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