Job description for Senior Flutter Developer (Freelance) at Superalink
Superalink is looking for an experienced Senior Flutter Developer / strong Mid-Senior Flutter Developer to join us as a freelancer and support the development of our new Superalink Mobile App.
You’ll work closely with our Front-End, Backend, Product, and UI/UX teams to build and deliver a production-ready mobile application for both iOS and Android.
What You’ll Work On
- Develop and maintain the Superalink Mobile App using Flutter & Dart
- Integrate existing REST APIs and third-party services/SDKs
- Implement authentication, user flows, and secure local storage
- Develop eSIM browsing, purchase, checkout, order, and eSIM management flows
- Integrate payment and web-based checkout flows
- Implement mobile-specific features
- Prepare and support releases to the Apple App Store and Google Play Store
- Provide technical documentation and knowledge transfer to the internal development team
Requirements
- 3+ years of hands-on Flutter development experience
- Proven experience developing and maintaining production mobile applications
- Strong knowledge of Flutter and Dart
- Strong experience with REST API integration
- Experience integrating third-party SDKs
- Experience with Flutter state management such as BLoC, Riverpod, Provider, or equivalent
- Experience with WebView integration
- Comfortable with basic native Android/iOS configuration from Flutter
- Experience with App Store and Google Play release processes is strongly preferred
💡 Important
This role goes beyond Flutter UI implementation.
We’re looking for a developer who is comfortable working with real production applications and mobile-specific capabilities such as APIs, third-party SDKs, payment flows, deep links, push notifications, location services, app lifecycle, and native Android/iOS configuration.
Production mobile app experience is highly important for this role.
An existing Superalink Front-End Developer will oversee technical coordination, code review, architecture alignment, and knowledge transfer.
📍 Location: Bali / On-site
