.NET Developer


Hi! We are SIENN – an international softwarehouse. We specialize ourselves in development and implementation of software products for companies mainly from Europe, and the United States. We are a group of enthusiasts – engineers whose passion is to create useful IT solutions.

Job Details

We are SIENN Living Online Technology! Let’s grow together!
Do you want to become a part of something new? We are looking for software enthusiasts, who are open to new challenges and new technologies. If you want to work in international team and have fun – join us!


You will be working with professionals who are focused on delivering usable software which helps to increase productivity and optimize business processes. In our projects, we use .NET Core for backend and one of two technologies like Angular or React for frontend application.
As a team member, you have an influence on the architecture of the solution from beginning to end. You will be part of an agile team using Scrum to manage their products.

You are an ideal candidate if you

  • Have excellent knowledge of C# 
  • Have excellent knowledge of Entity Framework and Linq
  • Have hands-on experience of .NET core 2.1
  • Have hands-on experience in using Microsoft Azure
  • Know MS SQL Server and TSQL
  • Know Git

 Extra points for

  • Being familiar with Atlassian Jira
  • Being familiar with Angular
  • Docker
  • Continuous Integration

We offer:

  • An exciting position where you can have fun creating value
  • Excellent opportunities for further personal and professional growth
  • Ability to work in agile methodologies (Agile / SCRUM)
  • Attractive conditions of employment (contract or B2B)
  • International training and certification (Microsoft MCP)
  • Medical package, Multisport card, free English lessons

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    Need Help ?

    Any questions? Please do not hesitate to contact me

    Katarzyna Skowronek

    HR Specialist

    +48 889 783 562