Mid/Senior Flutter Developer

Join an agile product team to rapidly develop a high-profile mobile application that bridges the gap between the Travel and iGaming sectors. The application serves as a unified platform allowing users to book hotel stays, exchange casino chips, and manage integrated customer loyalty services. You will build clean, high-performance features, integrate platform-specific SDKs, and ensure production-readiness for a fast-approaching summer launch window.

Details

• Start Date: Early June 2026.

• Duration: ~3 months (Until early September 2026, with potential extensions based on client review).

• Capacity: Full-time (FTE).

• Openings Available: 3x Flutter Developers.

• Seniority: Mid+ / Senior.

• Rate: Based on candidate experience and expectations.

Responsibilities

• Mobile Feature Development: Implement responsive, fluid user interfaces and cross-platform workflows in Flutter and Dart.

• Architecture Implementation: Write clean, modular, and testable code adhering to Clean Architecture guidelines.

• State & Data Management: Architect robust application flows utilizing modern state management patterns and asynchronous data streams.

• Native Integration: Develop custom native plugins or bridge native SDKs (Android/iOS) to enhance the core Flutter application.

• App Store Management: Oversee and configure build tools, automation dependencies, and the deployment lifecycle for Google Play and the Apple App Store.

Requirements

• Core Experience: Minimum 3 years of commercial experience in mobile application development.

• Flutter Ecosystem: Expert knowledge of Flutter & Dart, including deep familiarity with RxDart, Futures, Streams, flutter_hooks, get_it, and dio.

• Native Foundations: Hands-on experience with native Android SDK and/or iOS SDK development.

• Architecture: Strong mastery of architectural patterns such as MVVM, MVI, or BLoC.

• Build Systems: Clear understanding of platform-specific configuration and build tools (Xcode/SPM, Gradle).

• Testing: Practical experience writing reliable Unit Tests.

• Languages: Professional fluency in both Polish and English (minimum B2).

Nice to Have

• Proven experience writing proprietary native SDKs or custom open-source Flutter plugins.