Back-End Developer (.Net 8.0)

Project Information:

An international project in the financial sector for a Dutch client specializing in audits, accounting, payroll, HR, and tax advisory. The goal is to support the development of an existing accounting application.


Participation in developing an application using the latest technology stack, upgrading to a newer version (.Net 8.0), and migrating the platform from OnPremise to Azure.

Technology Stack:

  • ASP .Net MVC
  • .Net 4.7/4.8
  • .Net 8.0
  • C#
  • Azure
  • Entity Framework
  • Git
  • MS SQL Server

What We Offer:

  • B2B: 15 200  – 25 400 PLN/month net (includes 26 days of paid days off)
  • Work in an international environment
  • Fully remote work (it is also possible to work from the office in Wrocław or in hybrid mode)
  • 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, Multisport card and life insurance
  • Thursday lunches at the office
  • Modern office with a swimming pool on the roof
  • Great atmosphere at workplace!

Job Requirements:

  • Experience with ASP .NET MVC and .NET 4.7/4.8
  • Proficient in C# and .Net
  • Experience with Azure Cloud
  • Experience with REST API’s
  • Knowledge of MS SQL Server
  • Excellent communication and interpersonal skills
  • Good command of English, both spoken and written

Nice to Have:

  • Experience with Docker
  • Experience in upgrading technology stacks


If you have questions about this position, contact me 🤙

Aneta Zawieja

HR Specialist

+48 535 566 283

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    Claartje Pothof-van der Zande

    HR Specialist

    +31 24 366 0 466

    Aneta Zawieja

    HR Specialist

    +48 535 566 283

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