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November 3, 2026

Senior Software Engineer (.NET Full-Stack)

Senior • Remote

208,000 - 291,200 PLN/yr

Warsaw, Poland

Quick Facts

  • Collaboration: B2B

  • Rate: up to 140 PLN/hour net + VAT

  • Work mode: 100% remote

  • Role focus: backend-heavy full-stack .NET engineer

Description

You will work as a Senior .NET full-stack engineer, with most responsibilities centered on HTTP APIs, business logic, integrations, data access, and asynchronous processing in production.

As a Senior Engineer, you will deliver larger features from implementation through production deployment, participate in technical decisions, and ensure code quality via code reviews while supporting less experienced team members.

When needed, you will also develop the frontend using React and TypeScript to deliver end-to-end functionality.

Responsibilities

  • Implement larger functionalities from the project stage to production deployment

  • Participate in technical decisions

  • Ensure code quality during code reviews

  • Support and mentor less experienced team members

Requirements

  • Very good, up-to-date knowledge of .NET/C# and experience building production enterprise systems

  • Solid experience with SQL Server or a comparable relational database

  • Practical experience building and maintaining HTTP APIs, integrations, and asynchronous/queue-based processing in a production environment

  • Experience working with applications hosted in Azure

  • Ability to work both on backend and on React/TypeScript when end-to-end delivery is required

  • Experience independently owning features from implementation through deployment, production support, and code review

  • Very good technical communication and ability to actively participate in project and architectural discussions

Benefits

  • B2B cooperation

  • Up to 140 PLN/hour net + VAT

  • 100% remote work

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