Senior Software Engineer

Link Group; Warszawa; Hybrid; PLN 150,000 - 230,000; Full time

Job summary

Link Group in Poland is seeking a Senior Software Engineer with a back-end-first full stack profile to join an Azure-hosted platform. You will primarily develop backend APIs, business logic, and data access, while contributing to frontend when needed.

The role focuses on .NET 9, C# 13, SQL Server, MongoDB, Redis, and modern cloud patterns. You will collaborate with an agile team and help optimize performance and reliability across services.

Responsibilities

• Develop backend APIs and business logic with a focus on backend stability and performance.

Skills

Back-end development

C#

NET

REST APIs

Full stack collaboration

Tools

SQL Server

MongoDB

Redis

Azure

SignalR

Job description

Senior Software Engineer – Back-end-first Full Stack .NET

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.