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Xamarin Developer (C#)

Location: Lublin or Warsaw, full-time


  • Working in development teams to analyze requirements and create sulutions
  • Coworking with the creative team as well as all other stakeholders to ensure that project objectives are met as expected
  • Implementing functionalities based on specifications
  • Maintaining compliance with architectural principles specified in the project
  • Actively proposing new mobile solutions, frameworks in accordance with the requirements and market conditions
  • Caring for the highest quality of code (creation, implementation, extension, testing
  • Ability to stick to the deadlines
  • Code refactoring and improving  an architecture 

If you possess these skills:

  • Experience in programming in C# .NET (also in non-commercial projects)
  • Good knowledge about Xamarin and one of the popular mobile system (Android or IOS)
  • Experience in: LINQ, MVVM, Entity Framework
  • Knowledge of REST and SOAP
  • Familiarity with UWP, WPF or Windows Mobile technology
  • Understanding of OOP
  • Practical knowledge of design patterns & the best practices
  • Experience in relational databases
  • Positive attitude
  • Good communication skills
  • Intermediate English skills (B1)

Nice to have:

  • Knowledge of the native mobile programming (andriod -> java or kotlin, IOS-> objective-c or swift)
  • Experience in programming in .NET web technology (ASP.NET MVC or Core)
  • Basic knowledge of Angular or React
  • Experience in Cloud Technologies Azure, Visual Studio Online and Unit Testing

We can offer to you:

  • A transparent contract and comfortable employment model (you choose type of agreement)
  • Work in an experienced team using best practices (SOLID, Clean code)
  • Work-life balance - possible flexible hours and home office
  • No stiff structure
  • No dress code
  • Casual start-up atmosphere
  • The best view from one of the highest viewpoints in the city
  • English classes with native speaker during work hours
  • Chill room
  • Company sponsored events.

If you have the qualifications mentioned above and are interested in joining the team, send us your CV to

About JMMJ:

JMMJ has completed IT projects across Europe and North America. The firm was founded in 2008, and we are a Microsoft Certified Partner since 2009.