NET Developer

3 tygodni temu

Warszawa, mazowieckie, Polska N7 Mobile Sp. z o.o. Pełny etat 18 zł - 480 zł

.NET Developer

B2B , salary range flexible

Hybrid – Warsaw, Puławska 182 (1/2 days from the office)


About N7 Mobile


N7 Mobile is a close-knit, 18-year-strong boutique software house that builds mission-critical systems for some of the biggest financial, payment, and fintech players in Europe.

We’re expanding one of our flagship long-term teams with an experienced .NET engineer who will take real ownership of a brand-new, high-impact backend component – a standalone, long-running service built in .NET 8+ and shipped in Docker, running both in the cloud and directly on customer premises.


Stability, clean architecture, and smooth deployment experience are everything here.


Key Responsibilities

  • Design and deliver a rock-solid Background/Worker Service in .NET 8+

  • Build a production-ready Dockerized component (cloud + on-premise deployments)

  • Keep code quality, testability, and long-term maintainability at the highest level

  • Actively drive development with GitHub Copilot, we expect ~50% of the code to be AI-assisted

  • Own CI/CD pipelines (GitHub Actions)

  • Perform thorough code reviews and continuously raise the team’s engineering bar

  • Collaborate daily with the rest of the dev team (English is the working language)


Requirements

  • Deep, production-grade expertise in C# and .NET 8+

  • Proven track record shipping long-running services (Worker Service / IHostedService) in Docker

  • Strong grasp of background service architecture (channels, resilience, observability, Polly, etc.)

  • Fluent with Git + GitHub Actions workflows

  • Real daily experience using GitHub Copilot (or similar AI tools) and great prompting skills

  • Clean code, SOLID, and modern patterns (DDD/CQRS appreciated) are second nature to you

  • Solid spoken and written English (B2+ or higher) – daily technical discussions

  • Bonus points: background in financial systems, fiscalization, or POS solutions


Recruitment process – just 3 short stages

  1. Quick HR call (expectations & logistics)

  2. Technical interview with the team

  3. Project deep-dive call – mostly for you to get to know us and the project inside out


If you enjoy small, senior-heavy teams where decisions are made fast and your opinion truly matters, this is the place.


We’re looking exactly for you. Apply now

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