Senior/Lead Xamarin Developer

September 25, 2026

Office

Senior

Vilnius, Lithuania, Warszawa, Poland

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Office-only work

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English is required
Background check required
B2B contract

Description

Product development and R&D company founded in 1997 that delivers innovation, ideation and digital transformation services on a global scale. The team is expanding and plans to start new projects within the next 1-2 months, so resumes are being accepted and candidates processed now. The role is a Senior/Lead Xamarin Developer responsible for designing application architecture and building Xamarin applications from scratch. Positions are based in Vilnius, Lithuania and Poland under employment or B2B contracts.

Responsibilities

Design application and task-level architecture, applying modern technologies, practices, and methodologies
Implement Xamarin applications from scratch
Assign and distribute tasks across the development team
Estimate development effort for tasks and features
Solve complex technical problems and propose improvements
Perform code reviews and maintain code quality standards
Share knowledge and mentor teammates

Requirements

Strong knowledge of C# and .NET
Deep understanding of object-oriented design and design patterns
Proven experience building Xamarin applications end-to-end
Experience designing application architecture from scratch
Experience with native iOS or Android development (Swift/Objective-C or Kotlin/Java)
Ability to estimate development effort accurately
Strong team player with open, informal communication style, both within and outside the team
Good written and verbal English
Experience with Xamarin.iOS, Xamarin.Android, or Xamarin.Forms (nice to have)
Familiarity with iOS and Android SDKs (nice to have)
Experience with Xamarin Studio, Android Studio, or Xcode (nice to have)

Conditions

Employment contract option in Vilnius, Lithuania
Employment or B2B contract option in Poland
New projects expected to begin within the next 1-2 months

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