Mobile Application Developer

About the Role

We're looking for a skilled Flutter Developer to join our Development team on a 6-month contract engagement. You'll be developing and maintaining cross-platform mobile applications for both iOS and Android. You'll be joining an established codebase with clear architectural patterns. You'll extend existing features, implement new functionality, and collaborate with backend developers and UI designers to deliver high-quality mobile experiences.

What You'll Do

• Develop and maintain features in our Flutter mobile application (iOS & Android)
• Work with GetX state management to build reactive, maintainable UI components
• Integrate with backend APIs using our generated OpenAPI client and Dio HTTP client
• Implement push notifications via Firebase Cloud Messaging (FCM)
• Build data visualization features using fl_chart and calendar components Support Thai and English localization using our existing i18n system
• Collaborate with UI Designers to implement pixel-perfect interfaces following a design guidelines
• Participate in code reviews and contribute to improving code quality
• Troubleshoot and resolve issues across both iOS and Android platforms

What We're Looking

For Required:

• 2–5 years of hands-on experience in Flutter mobile development
• Strong proficiency in Dart and Flutter Experience with GetX for state management, dependency injection, and navigation Solid understanding of RESTful API integration using Dio or similar HTTP clients
• Familiarity with Firebase services (especially Cloud Messaging)
• Experience with local storage solutions (SharedPreferences, GetStorage, or similar)
• Proficiency with Git version control Understanding of mobile UI/UX principles for both iOS and Android Ability to read and work with existing codebases following established patterns
• Clear communication skills and collaborative mindset

Nice to Have:

• Experience with contract-driven development (OpenAPI/Swagger)
• Familiarity with payment gateway integrations (Omise, Stripe, or similar)
• Experience implementing in-app purchases and subscriptions
• Experience with FVM (Flutter Version Manager) Familiarity with CI/CD pipelines for mobile deployment

What You'll Be Working On

A health and wellness application featuring mood tracking, cognitive assessments, subscriptions, and multi-language support (Thai/English).

• User-facing screens and interactive components
• Data entry forms and validation
• Data visualization with charts and calendars
• Push notification handling with deep linking
• Subscription and in-app purchase flows
• Integration with backend APIs You'll be joining a mature codebase with clear separation between screens, widgets, controllers, and services.

Tech Stack You'll Work With

• Framework: Flutter (via FVM)
• State Management: GetX
• HTTP Client: Dio + Generated OpenAPI Client
• Local Storage: GetStorage, SharedPreferences
• Push Notifications: Firebase Messaging
• Payments: Omise, In-app Purchase
• Charts: fl_chart
• Calendar: table_calendar
• Animations: flutter_animate, Lottie
• Localization: intl (Thai/English)

Why Join Foxbith

Our Passion At Foxbith, we create technology that positively impacts people's lives. We love building things that work, designing experiences that matter, and delivering results you can actually see. Our clients range from enterprises to startups, and we work alongside them, learning and sharing experiences together, with one shared goal: making the work succeed.

Our Culture

We're built on collaboration, respect, and continuous learning. We encourage open and direct communication, teamwork, and proactive problem-solving. We run a GitOps-driven workflow where everything lives in GitHub. Sprint planning, code reviews, and retrospectives are issue-based, commit-driven, and data-informed. Minimal overhead, no endless meetings. Everyone has a voice here, and we let the work speak for itself.

What We Offer

We care about your well-being and growth, even on a contract engagement. We create an environment that supports your development and helps you do your best work.

• Competitive contract rate Hybrid work arrangement (3–5 days remote per week)
• Access to Claude Code Max
• Access to online learning resources
• Complimentary snacks, coffee, and beverages
• Weekly team lunch
• A supportive and collaborative team environment

If you share our passion for building meaningful products and want to grow alongside a team that supports each other, we'd love to hear from you. Submit your CV or resume through our application form or reach out to us at