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Senior Software Engineer

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Warszawa
Poznań
Wrocław
Lublin
+6
Expires Nov 29, 2026
4 days ago

In short

Senior Software Engineer for Azure-hosted platform in Warszawa. Focus on .

NET 9, C# 13 backend development (APIs, logic, integrations). React/TypeScript frontend contribution. Requires .

NET/C# production experience, SQL Server, Azure, and full-stack capabilities. Owned features from design to production.

Keywords

.NET C# React TypeScript SQL Server Azure APIs SignalR MongoDB Redis

AI-written summary based on the listing content.

We are looking for a Senior Software Engineer with a strong back-end-first full stack profile to join an Azure-hosted platform.

Your main focus will be backend development – APIs, business logic, integrations, data access and asynchronous processing – with the opportunity to contribute to the React / TypeScript frontend when needed.

You will work with .

NET 9, C# 13, React 18, TypeScript, SQL Server, MongoDB, Redis, Azure Storage Queues, SignalR and Ocelot.

Requirements:

  • Strong production experience with .

NET / C#

  • Experience with SQL Server or a similar relational database
  • Hands-on experience with APIs, integrations and asynchronous processing
  • Experience with Azure
  • Ability to contribute across backend and React / TypeScript
  • Experience owning features from design through production
  • Strong communication and collaboration skills

Nice to have: MongoDB, Redis, SignalR, Ocelot, regulated/finance/tax environments, or mentoring experience.

Tax technology experience is not required – you should be comfortable learning complex business rules and turning them into reliable software.
Published 2026-10-29
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