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September 25, 2026

Flutter Developer

Senior • On-site

Warsaw, Poland

Quick Facts

  • Role: Flutter Developer
  • Focus: Building and maintaining high-quality Flutter applications for a flagship mobile game and new projects

Description

Develop and maintain high-quality Flutter applications with emphasis on performance, stability, and clean architecture. Build adaptive, responsive UIs and complex animations with pixel-perfect precision, and design modular, testable architectures. Continuously improve code quality through reviews, refactoring, and automated testing.

Responsibilities

  • Develop and maintain Flutter applications (performance, stability, clean architecture)
  • Implement responsive UI and complex animations with pixel-perfect precision
  • Create modular and testable architecture
  • Identify and fix performance bottlenecks (scrolling, rendering, rebuilds)
  • Collaborate with designers and backend engineers for smooth UX on iOS and Android
  • Improve code quality via code reviews, refactoring, and automated testing

Requirements

  • 4+ years of Flutter/Dart experience with solid understanding of widget lifecycle, state management, and animation
  • Strong knowledge of Flutter SDK (animations, adaptive UI, rendering, performance tuning)
  • Proficiency in Dart (async programming, isolates, generics, mixins)
  • Experience building custom UI components, pixel-perfect layouts, and smooth 60/120 FPS animations
  • Deep understanding of Bloc/Cubit/Provider and clean architectural principles (SOLID, Clean Architecture)
  • Hands-on experience with Flutter DevTools for performance profiling and optimization (scroll, rebuilds, memory)
  • Ability to integrate Firebase, analytics, in-app purchases, and push notifications
  • Understanding of Android/iOS ecosystems and platform channels for native integrations
  • Experience writing and maintaining unit and integration tests
  • Russian C1+; English B1+

Benefits

  • Competitive salary and benefits package
  • Opportunity to work with a talented, passionate team in a creative environment
  • Flexible working hours and remote/office options
  • Career growth and professional development opportunities
  • Fun, inclusive culture that celebrates diversity and creativity

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