flutter developer

X-FLOW is a mobile game development company established in 2018, known for the creation of Happy Color, a popular digital coloring book and ad-driven mobile application. The company maintains a diverse team and partnerships across the UK, Cyprus, the Netherlands, and other global regions.

• Develop and maintain high-quality Flutter applications focusing on performance, stability, and clean architecture;
• Implement adaptive, responsive UI and complex animations with pixel-perfect precision;
• Design modular and testable architectures;
• Identify and fix performance bottlenecks including scrolling, rendering, and rebuilds;
• Collaborate with designers and backend engineers to deliver smooth UX across iOS and Android;
• Improve code quality through reviews, refactoring, and automated testing.

• 4+ Years of Flutter/Dart experience with understanding of widget lifecycle, state management, and animation system;
• Strong knowledge of Flutter SDK including animations, adaptive UI, rendering, and performance tuning;
• Proficiency in Dart covering async programming, isolates, generics, and 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 like SOLID;
• Hands-on experience with Flutter DevTools for performance profiling and optimization;
• 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/higher;
• English B1+.

• Competitive salary and benefits package;
• Opportunity to work in a creative and dynamic environment;
• Flexible working hours;
• Career growth and professional development opportunities;
• Inclusive company culture.