Backend Engineer

SwapRail is seeking a Backend Engineer to design and implement scalable backend services and APIs, optimize system performance, and collaborate with teams for consistent execution flows.

## What you'll do

• •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

• •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