Flutter Developer

X-FLOWis 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 aFlutter Developerfor 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 across iOS and Android.
• Continuously improve code quality through reviews, refactoring, and automated testing.

Requirements:

• 4+ years of Flutter/Dart experiencewith solid understanding of widget lifecycle, state management, and animation system.
• Strong knowledge ofFlutter SDK(animations, adaptive UI, rendering, performance tuning).
• Proficiency inDart(async programming, isolates, generics, mixins).
• Experience buildingcustom UI components,pixel-perfect layouts, andsmooth 60/120 FPS animations.
• Deep understanding of Bloc / Cubit / Providerand clean architectural principles (SOLID, Clean Architecture).
• Hands-on experience withFlutter DevToolsfor performance profiling and optimization (scroll, rebuilds, memory).
• Ability to integrateFirebase, analytics, in-app purchases, and push notifications.
• Understanding ofAndroid/iOS ecosystemsand platform channels for native integrations.
• Experience writing and maintainingunit 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).