Must have

• OOP

• TypeScript

• Node.js

• MongoDB

• Docker

• Communication skills

• SIP

• Networking

• English

Nice to have

• Kubernetes

• Nest.js

• Redis

• Microservices architecture

Requirements description

Must-have qualifications:

• 7+ years of experience in backend development
• Strong hands-on experience with:
  • OOP TypeScript
  • Node.js
  • MongoDB
  • Docker
• Fluent English communication skills
• Passion for clean, modular, and maintainable code
• Proven experience in at least one of the following technical areas:
  • SIP protocol
  • Real-Time Communication (RTC)
  • Networking / Data streaming
  • Low-latency / High-throughput data processing

Nice-to-have:

• Experience with Kubernetes
• Familiarity with NestJS, Inversify, or Koa
• Knowledge of Redis, Jest
• Microservices architecture
• Participation in research sprints and technology evaluations

Offer description

Location: Remote (Polish time zone)

Engagement: Full-time (100% FTE), 150-170 pln/h netto + VAT B2B contract – 6 months with possible extension

Project Description

We are looking for a Senior Backend Engineer experienced in Real-Time Communication (RTC), low-latency data processing, and distributed backend systems. Our client is a fast-growing AI company building cutting-edge solutions for enterprise-level contact centers. Their platform leverages advanced artificial intelligence to deliver natural and personalized conversations across multiple communication channels — including voice, chat, and messaging apps.

You will collaborate directly with the Engineering Manager / Product Owner, aligning technical architecture with business objectives. This is a fully remote position within the Polish time zone, with occasional client meetings.

Your responsibilities

1. Design and develop scalable backend systems using Node.js and TypeScript
2. Build and maintain containerized applications running in Kubernetes clusters
3. Collaborate with internal developers and technical leadership to deliver high-quality enterprise solutions
4. Ensure performance, reliability, and low latency in real-time communication systems
5. Participate in technical planning, architectural decisions, and code reviews