X-FLOW is a mobile game development company established in 2018. We gained recognition after the release of Happy Color, the most popular digital coloring book and one of the most successful ad-driven mobile apps in the world. We are looking for a Flutter Developer for our flagship project, Happy Color, and for development of new projects.

Key Responsibilities

: - Develop and maintain high-quality Flutter applications with a focus 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 (scrolling, rendering, rebuilds). - Collaborate closely with designers and backend engineers to deliver smooth UX acrossi OS and Android. - Continuously improve code quality through reviews, refactoring, and automated testing.

Requirements: - 4+ years of Flutter/Dart experience with solid understanding of widget lifecycle, state management, and animation system. - 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/higher, English - B1+.

What We Offer: - Competitive salary and benefits package. - Opportunity to work with a talented and passionate team in a creative and dynamic environment. - Flexible working hours and remote/office work options. - Career growth and professional development opportunities. - A fun and inclusive company culture that celebrates diversity and creativity.

Join us and let’s create great content together! *When you apply for this role, we process your personal data in accordance with our Candidate Privacy Notice (https://xflowgames.com/candidate-privacy-notice).*