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