Sr. .NET Developer

BonapoliaWarszawaJob.bopublished 11/09/2026
Must-have:C#CloudBackendAISecuritySenior

Project Description: Building products for sports data, including scores, statistics and related use cases.

Soft Skills:

  • Ability to break down business or customer problems, design practical solutions and formulate specifications for AI coding agents.
  • Strong ownership and accountability for all delivered work.
  • Strong spoken and written English communication skills.

Hard Skills / Must Have:

  • Senior-level commercial experience with C#, modern .NET and http://ASP.NET.
  • Experience designing and building APIs, data models and databases.
  • Understanding of cloud infrastructure.
  • Experience with AI-native engineering, AI coding agents and spec-driven development.
  • Ability to work directly in the code when most effective.

Hard Skills / Nice to Have (Optional):

  • Experience with a cloud platform.

Responsibilities:

  • Design and build backend services and APIs using C# and .NET.
  • Break down business problems, design solutions and create delivery plans with AI coding agents.
  • Use AI coding agents to develop, test, refine and submit merge requests.
  • Review, validate and improve production code for reliability, security and maintainability.

Technology Stack: C#, modern .NET, http://ASP.NET, cloud platform; APIs, data modeling and databases

👍English: upper-intermediate 🌍 Location:

📩 Ready to Join? We look forward to receiving your application and welcoming you to our team!