Short description

We are looking for an experienced Senior Backend developer capable of working with heavy legacy, complex architecture and developing a large production application.

Important: juniors, middles without real production experience, and graduates of the courses are not suitable.
We need developers who have been writing combat services for 5+ years, not training todo lists.

• , Stack

  • Node.js

  • NestJS

  • React

  • MongoDB (very deep knowledge is critical)

  • Redis

  • Memcached

  • REST API

  • WebSocket

  • Microservice architecture (required)

  🔥 Requirements — strictly Senior

  1. 5+ years of production experience in Node.js

  Architecture, optimization, refactoring, production loads.

  2. Strong NestJS

  Module structures, DI, pipes, filters, guards, microservices, interceptors.

  3. Deep expertise in MongoDB (must-have)

  • indexes (creation, analysis, profiling)

  • complex aggregates

  • heavy query optimization

  • debugging slow queries

  • working with large collections

  • understanding the mechanics of data storage and query behavior

  If you “just used Mongo", that's not enough.

  4. Excellent knowledge of microservice architecture

  I didn't “read articles”, but actually designed, maintained and scaled microservices.:

  • understanding patterns: event-driven, pub/sub, message-bus

  • service interaction, routing, discovery

  • queues, caches, balancing, retrays

  • idempotency and transactionality in distributed systems

  • monitoring and logging of distributed queries

  • CI/CD for microservices

  • migrations from monolith to microservices

  • the strategy of splitting into services

  • working with dependencies and contracts between services

  If you haven't solved real problems in microservices, that's a no.

  5. The ability to work with legacy

  You need to be able to:

  • understand someone else's code quickly

  • highlight modules

  • rewrite without falling

  • migrate to a new architecture

  • perform safe refactorings

  6. Asynchronous operation at the expert level

  • event loop

  • promises, async/await

  • race conditions

  • task queues

  • asynchronous bottleneck profiling

  7. Advanced understanding of REST API and WebSocket

• designing

• stability of compounds

• optimization

• graceful shutdown

• proper error handling