Flutter Developer — Remote/Hybrid, Pixel-Perfect UI & Animations

X-FLOW; Warszawa; Hybrid; PLN 150,000 - 240,000; Full time

Benefits offered by this job

Flexible hours

Remote/office options

Career growth

Creative culture

Job summary

X-FLOW is a mobile game development company established in 2018. We are looking for a Flutter Developer for our flagship project, Happy Color, and for development of new projects.

You will develop and maintain high-quality Flutter applications with a focus on performance, adaptive UI, and pixel-perfect animations across iOS and Android. Join a creative team and help deliver smooth UX.

We offer flexible hours, remote/office options, and opportunities for growth in a dynamic environment.

Qualifications

• 4+ years of Flutter/Dart experience.
• Solid understanding of widget lifecycle, state management and animation system.
• Experience building custom UI components and pixel-perfect layouts.
• Experience with Bloc/Cubit/Provider and Clean Architecture.

Responsibilities

• Develop and maintain high-quality Flutter applications with 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.

Skills

Flutter/Dart

Widget lifecycle

State management

Animations

Performance tuning

Unit tests

Integration tests

Bloc/Cubit/Provider

DevTools

Firebase

Push notifications

Android/iOS

Platform channels

Tools

Flutter DevTools

Flutter SDK

Job description

X-FLOW is a mobile game development company established in 2018. We are looking for a Flutter Developer for our flagship project, Happy Color, and for development of new projects.

You will develop and maintain high-quality Flutter applications with a focus on performance, adaptive UI, and pixel-perfect animations across iOS and Android. Join a creative team and help deliver smooth UX.

We offer flexible hours, remote/office options, and opportunities for growth in a dynamic environment.