Senior Flutter Developer - Remote & Flexible UI

xflow

Warszawa

Hybrid

PLN 180,000 - 240,000

Full time

14 days+

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Benefits offered by this job

Flexible hours

Remote/office options

Career growth

Job summary

X-FLOW in Warsaw, Poland, is seeking a Flutter Developer for the Happy Color project and new initiatives. You will build high-quality Flutter apps with pixel-perfect UI, maintain performance, and implement modular architectures across iOS and Android.

Join a creative team with flexible hours, remote/office options, and growth opportunities. The role requires 4+ years of Flutter/Dart experience, strong UI skills, and experience with state management and testing.

Qualifications

4+ years of Flutter/Dart experience with widget lifecycle, state management, and animations.
Experience with pixel-perfect layouts and 60/120 FPS animations.
Deep understanding of Bloc, Cubit, and Provider patterns and clean architecture.
Hands-on with performance profiling and optimization using DevTools.
Ability to integrate Firebase, analytics, in-app purchases, and push notifications.
Knowledge of Android/iOS ecosystems and platform channels.

Responsibilities

Develop and maintain high-quality Flutter applications focused 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 with designers and backend engineers to deliver smooth UX on iOS and Android.
Improve code quality through reviews, refactoring and automated testing.