Backend Developers (Node.js, Express, or NestJS) $$$ Offline

Project Overview:
We are building an Exchange platform for a newly deployed EVM-compatible token. The project was partially developed by a previous team, and the client needs skilled developers to continue and complete the implementation.
 

Skills Required:
- Strong experience with Node.js, Express, or NestJS
- Database expertise (PostgreSQL, MongoDB, or Redis)
- Knowledge of blockchain indexing (The Graph, Moralis, or custom solutions)
- Experience with REST & WebSocket APIs
- Familiarity with JWT, OAuth, and API security
- Understanding of rate limiting, caching, and performance optimization
 

Responsibilities:
- Build and maintain backend services for the DEX
- Handle order book management, transaction history, and user data
- Integrate with blockchain nodes (Alchemy, Infura, QuickNode)
- Ensure high availability and security of backend services