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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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