Senior Flutter Developer - Internship

Senior Flutter Developer

**Remote 3-Month Unpaid Opportunity Part-Time / Flexible**

LYNA is a women’s health and nutrition app helping women better understand the connection between their menstrual cycle, nutrition, weight, and hormonal health .

We’re looking for a Senior Flutter Developer to join us remotely for an initial 3-month unpaid engagement and help take LYNA’s mobile experience to the next level.

This is an opportunity to work directly on a real product with an existing user base and meaningful impact — not a hypothetical side project.

About LYNA

LYNA provides personalized, cycle-aware nutrition guidance, including:

• Menstrual cycle tracking and phase-based insights
• Meal and nutrition tracking
• Food/meal photo scanning
• Macro and micronutrient tracking
• Personalized calorie and weight goals
• Nutrition guidance for areas such as PCOS, fertility and perimenopause
• Evidence-informed health and nutrition recommendations

LYNA already has 15,000+ users , and we’re continuing to improve and scale the product.

The Role

As our Senior Flutter Developer , you’ll take ownership of the mobile application and work closely with the product/founding team to build, improve and maintain LYNA.

You’ll have significant influence over the technical direction of the Flutter app, architecture, user experience and development practices.

What you’ll do

• Develop and maintain LYNA’s iOS and Android applications using Flutter/Dart
• Build polished, responsive and intuitive mobile experiences
• Translate Figma/product designs into high-quality production interfaces
• Integrate REST APIs and third-party services
• Work with authentication, user profiles, subscriptions and app data
• Implement health, nutrition and cycle-tracking features
• Work with image/meal-scanning functionality and AI-powered experiences
• Improve application performance, reliability and scalability
• Identify and resolve bugs and technical issues
• Refactor and improve existing code where necessary
• Help establish and maintain a clean, scalable Flutter architecture
• Write maintainable, well-tested and production-ready code
• Participate in technical/product discussions and contribute to product decisions
• Help prepare the application for continued growth and future releases

What we’re looking for

Required:

• 5+ years of professional software development experience
• Strong commercial experience with Flutter and Dart
• Experience shipping and maintaining production Flutter applications
• Strong understanding of mobile app architecture and state management
• Experience integrating APIs and backend services
• Strong knowledge of Git and modern development workflows
• Experience debugging and optimizing mobile applications
• Good understanding of iOS and Android development considerations
• Strong attention to UI/UX quality
• Ability to work independently and take ownership of technical decisions
• Comfortable working remotely in a fast-moving startup environment

Nice to have:

• Experience with health, wellness, nutrition or fitness apps
• Experience with AI/ML-powered mobile features
• Experience with camera/image processing or food recognition
• Experience with Firebase
• Experience with payments/subscriptions and RevenueCat
• Experience with analytics and crash reporting
• Experience publishing apps to the App Store and Google Play
• Experience working in an early-stage startup

What you’ll get

• Work directly on a live product with 15,000+ users
• Significant ownership over the Flutter application
• Opportunity to influence the technical architecture and roadmap
• Direct collaboration with the founding/product team
• Flexible, fully remote working arrangement
• A strong opportunity to make a visible impact on a growing women’s health product
• Potential to continue working with the team beyond the initial 3 months based on mutual fit and the project’s needs

Important

This is a 3-month unpaid opportunity .

We’re looking for someone who is genuinely excited about the product, wants meaningful ownership, and is interested in contributing to an early-stage health-tech startup.

If you’re a senior Flutter developer who enjoys building products from the ground up and wants to work on something with real-world impact, we’d love to hear from you.

Apply

Please send:

• Your CV / LinkedIn profile
• Links to Flutter apps or projects you’ve worked on
• GitHub or…