Job Details

Vacancy: Node.js Developer (Middle+/Senior) at Lagrange Labs. Development of backend services on Node.js/TypeScript, integration with blockchain networks. Salary: 6000-7500 USD. Full-time, remote work.

— Design and development of scalable backend services on Node.js / TypeScript. — Creation of APIs (REST, GraphQL, gRPC) for interaction with ZK coprocessors and data storage systems. — Integration with blockchain networks (Ethereum, L2) using Viem, Ethers.js, or Wagmi libraries. — Work with distributed message queues and real-time blockchain event processing. — Optimization of backend performance and work with databases (PostgreSQL, Redis, ClickHouse). — Writing robust, test-covered code (Jest, Mocha) and participation in Code Reviews. — Participation in architectural decisions regarding the integration of ZK provers into client applications.

— Commercial backend development experience of 4+ years (Node.js). — Deep understanding of TypeScript, Event Loop, and asynchronous programming. — Confident experience with NestJS or Fastify frameworks. — Practical experience in designing microservice architecture. — Understanding of Web3 principles (providers, JSON-RPC, working with smart contracts). — Skills in working with Docker and understanding CI/CD processes. — English language: Upper-Intermediate (for communication in an international team). Will be a plus: — Experience with high-load systems. — Basic knowledge of Rust or Go. — Understanding of Zero-Knowledge Proofs concepts.

Full-time, Remote