Buffbunny
Grounds
35K subscribers in two weeks
A community-first fitness product with a responsive Flutter app and a Swift watch companion used by 10K+ people daily.
The assignment
Senior Flutter engineer across responsive UI, Riverpod state, community flows, API integration, and Apple Watch delivery.
The hard part
Make workouts, community interaction, and watch-to-phone continuity feel like one product across very different screen sizes.
Architecture decisions
- Built adaptive interfaces that preserve interaction priority from small phones to larger devices.
- Separated server state and view state to keep community surfaces predictable under rapid updates.
- Delivered the watch companion natively in Swift for tighter platform integration.
What changed
- Reached 35,000 subscribers in the first two weeks.
- Ranked number 36 in Health & Fitness during launch momentum.
- The watch experience supports 10,000+ daily users.
Need this kind of ownership?
I work best where mobile product quality, release confidence, and maintainable architecture all matter.
Talk about your product