Back-End 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.
You will take part in creating backend applications for data processing, analysis, and presentation for the pharmaceutical industry.
In our projects, we use .NET Core technology in the backend with Angular/React in the front. The area of our projects is IoT – Azure IoT Hub, Azure IoT Central.

You are an ideal candidate if you

  • Have excellent knowledge of C#
  • Have 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/React
  • Docker
  • Continuous Integration

We offer:

  • Using modern tools and technologies
  • Working agile (Agile / Scrum)
  • International training and certification (Microsoft MCP)
  • Diversity of projects ( mostly for international clients)
  • Constant personal growth (additional leave for trainings, conferences)
  • Attractive conditions of employment (contract of employment or B2B)
  • Medical package and Multisport card,
  • Great atmosphere at workplace and fun after hours!

Currently we are working fully remotely.

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    Katarzyna Skowronek

    HR Specialist

    +48 889 783 562