Must have

• C#

• .NET Framework

• .NET CORE

• JSON

• Entity Framework

• SQL Server

• Microsoft Azure

• .NET

• Polish (C1)

• English (B2)

Nice to have

• React

• TypeScript

• JavaScript

• Docker

• DDD

Requirements description

We are looking for someone who has:

• English at a level allowing smooth written & verbal communication (min. B2) and Polish at minimum C1 — mandatory.

• Deep understanding of clean code principles, good programming practices, and software craftsmanship.

• Strong sense of ownership, self-discipline, and ability to work effectively in a fully remote team.

• Minimum 5 years of commercial experience with:

  • C#, .NET Framework, .NET Core, ASP.NET Web API.

  • JSON, REST/HTTP.

  • Entity Framework, SQL Server.

  • Microsoft Azure (DevOps, App Services, Azure SQL, Service Bus, Storage, Cosmos DB, Application Insights).

  • Unit testing & Integration testing.

  • Microservices architecture / related patterns (preferably Microsoft reference architecture).

• Experience using AI-assisted developer tools (Copilot, ChatGPT, etc.).

Nice-to-have skills:

• Experience with React (preferred) or other modern frontend frameworks.

• Familiarity with TypeScript, JavaScript, HTML, CSS.

• Experience with Docker, Domain-Driven Design (DDD), CQRS.

• Interest in AI/ML integrations and automating developer productivity.

Offer description

What can you expect in return?

• Full-time remote work.
• Competitive remuneration: 18 000-22 000 PLN net + VAT (B2B contract).
• 26 fully paid days off per year.
• Work in a highly experienced, cross-functional engineering team.
• Opportunity to tackle challenging backend and cloud projects with modern architecture & AI tools.
• Real impact — you will help define standards, best practices, and shape the backend foundations of our solutions.

Additional benefits:

• Private health care (Lux Med).
• Co-financing for MultiSport card.

Regular integration/team building events.

• We celebrate birthdays.

Ready to build high-quality backend systems & work at the intersection of .NET, Cloud & AI?

If you are a proactive, quality-conscious Senior .NET Developer who thrives in remote environments, takes ownership, and is excited about new technologies — apply now! We look forward to seeing what we can build together.

Your responsibilities

1. Designing, building, and maintaining backend services using C#, .NET Framework, .NET Core, ASP.NET Web API.
2. Developing and exposing REST/HTTP APIs, and handling JSON payloads with robustness and performance in mind.
3. Working with Entity Framework & SQL Server for data modeling, query optimization, and ensuring data integrity.
4. Operating in Microsoft Azure: using Azure DevOps, App Services, Azure SQL, Service Bus, Storage, Cosmos DB, and Application Insights to deliver scalable cloud solutions.
5. Writing and maintaining unit tests and integration tests to ensure code quality and system reliability.
6. Applying microservices architectural patterns, ideally aligned with Microsoft reference architectures.

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