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Swaprail

Backend Engineer

Location
Remote
Work mode
remote
Type
part-time
Department
Engineering
Last seen
1d ago
Design and build the core backend systems powering SwapRail, including APIs, routing engines, execution services, and data pipelines.
Location: Remote / Work from Home
Type: Part-time preferred / Full-time available
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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