rthms
Lead Developer / Co-founder
An iOS app that connects your habits with places, people, and plans that fit your life.
- Expo (SDK 57)
- React Native 0.86
- React 19
- TypeScript
Software engineer and founder
I build products end to end, from the first commit to the store listing.
Five products across web and iOS: lifestyle recommendations, family savings, fashion resale, commerce and tutoring. Each case study covers the problem, what I built and the engineering behind it.
Selected work
FamDay
Lead Developer / Co-founder
Family travel, dining, and activity deals ranked around your family's needs.
- TypeScript
- React 18 (Vite web)
- Expo 56 / React Native 0.85 (React 19 mobile)
- Supabase (Auth, Postgres, Edge Functions)
Cara
Co-founder
Resale recommendations based on the clothes you already own.
- React Native
- Expo SDK 57
- TypeScript
- Python
Iris d’Étoiles Webstore
Solo developer
An editorial fashion storefront with a complete browsing, cart, and checkout flow.
- Next.js-style App Router (on vinext)
- React 19
- TypeScript
- Tailwind CSS 4
Math Mastery Academy
Founder and Solo Developer
Algebra and Geometry practice with guided hints, progress tracking, and rewards.
- Node.js
- Express
- TypeScript
- PostgreSQL
About
I'm Ryan, a founder who writes the code. I'm the lead developer and co-founder of rthms and FamDay, co-founder of Cara, solo developer of the Iris d'Étoiles webstore, and founder and solo developer of Math Mastery Academy.
My work spans TypeScript across React, React Native and Expo, Node and Express, Supabase and Postgres, AWS serverless, Cloudflare Workers, and payments through Stripe and RevenueCat.
Contact
Email is the best way to reach me:
The quickest way to see my work is to use it. Each product has its own site: