Backend Developer (Node.js, NestJS)

Quick Facts

Backend Developer (Node.js, NestJS) focused on microservices and event-driven backend systems.

Description

Design and develop modern backend systems based on microservices and event-driven architecture. Build and document REST APIs using NestJS (Node.js) with MongoDB, Kafka/Redis, and WebSockets. Write unit tests with Jest and contribute to architecture and technology decisions.

Responsibilities

• Design and develop backend systems based on microservices and event-driven architecture
• Create and document REST APIs
• Write unit tests in Jest

Requirements

• Strong JavaScript/TypeScript knowledge
• NestJS experience
• Ability to create and document REST API
• Commercial experience with MongoDB and NoSQL databases
• Commercial experience with Kafka and/or Redis Streams
• Unit testing with Jest
• Basic CI/CD knowledge (GitHub Actions)
• Understanding of CQRS and event-driven architecture

Benefits

• Real impact on architecture and technology decisions
• Work in an experienced, well-coordinated team
• Hybrid or remote work model (office in central Warsaw)
• B2B cooperation; 12,000–18,000 PLN net per month