Back-End Developer (Web Forms)

Hi! We are SIENN Living Online Technology! Let’s grow together!

Job Details

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!




A project for a large client from the Netherlands, consisting of the development of web-based accounting and CRM software.

You will take part in developing the application based on ASP .Net WebForms (framework 4.7) on the backend side with React on the frontend side.

The project to be implemented uses cloud technologies and the CI / CD approach.

Your key skills:

  • Proficient knowledge of C# and ASP .Net WebForms (framework 4.7)
  • Hands-on experience with MS SQL Server
  • Hands-on experience in using Microsoft Azure, Azure DevOps
  • Good written and spoken English (minimum B2)

We offer:

  • Fully remote work (possibility to work in Wrocław or Opole office)
  • Work in SIENN teams (not outsourced)
  • International training and certifications (Microsoft MCP)
  • Constant personal growth (defined career paths, additional leave for training, training budget) 
  • Medical package and Multisport card
  • Great atmosphere at workplace!

for this job

    This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

    Need Help ?

    Any questions? Please do not hesitate to contact me

    Katarzyna Skowronek

    HR Specialist

    +48 889 783 562