Senior Flutter Developer

About the RoleAt Oak Technology, we build and scale subscription-based mobile applications used by millions of users worldwide.We're looking for a Senior Flutter Developer who enjoys building high-quality mobile experiences while collaborating closely with Product, Design, QA, Data, and Backend teams. You'll work across multiple products, own features end-to-end, and build experiences that directly impact user engagement, retention, and revenue.ResponsibilitiesDevelop and maintain high-quality Flutter applications for both iOS and Android.Build clean, scalable, and maintainable applications using modern Flutter architecture and best practices.Develop user-facing experiences such as onboarding flows, subscription journeys, paywalls, and core product features.Design responsive and adaptive interfaces using Material and Cupertino widgets.Collaborate closely with Product Managers, Designers, Backend Engineers, QA, and Data teams throughout the product lifecycle.Integrate REST APIs, third-party SDKs, Firebase services, analytics platforms, and monetization solutions.Implement state management using Bloc, Riverpod, Provider, or similar approaches.Optimize application performance, responsiveness, memory usage, and overall user experience.Support experimentation by implementing analytics events, A/B tests, and feature flags.Participate in code reviews, technical discussions, architecture decisions, and continuous improvement initiatives.What We're Looking For4+ years of professional mobile application development experience.Strong commercial experience developing Flutter applications with Dart.Experience building and maintaining production-ready mobile applications.Solid understanding of Flutter architecture, widget lifecycle, and state management.Experience with Bloc, Riverpod, Provider, or similar state management solutions.Experience integrating REST APIs, Firebase services, and third-party SDKs.Strong understanding of clean architecture, SOLID principles, and scalable code practices.Experience optimizing application performance and debugging using Flutter DevTools or similar tools.Experience working in cross-functional product teams.Strong verbal and written communication skills in English.Nice to HaveExperience with subscription-based mobile products.Experience integrating Google Play Billing, StoreKit, RevenueCat, Adapty, or other in-app purchase solutions.Experience implementing analytics platforms such as Firebase Analytics, Crashlytics, Adjust, or AppsFlyer.Experience with A/B testing, feature flags, and experimentation frameworks.Experience publishing and maintaining applications on both Google Play and the App Store.Experience with CI/CD pipelines such as Codemagic, Bitrise, GitHub Actions, or Fastlane.Basic knowledge of native Android (Kotlin) or iOS (Swift).Experience building AI-powered features using LLMs or AI SDKs.Familiarity with AI-assisted development tools such as Cursor, Claude Code, Codex, or GitHub Copilot.Experience with unit, widget, and integration testing.