Client work ships behind NDAs and store accounts. These are the opposite: compact reference apps, each built end to end, with a live demo you can click and public source you can read. One per stack I work in.
Each is a real, tested, deployable app — not a snippet. Open the demo, then read exactly how it is built.
Projects and Kanban with server-enforced roles
Team projects and Kanban tasks with owner and member roles enforced on the server, session auth, optimistic updates, and realtime rooms on Durable Objects. Deployed on Cloudflare Workers via OpenNext.
Expo app with a persisted offline cache
A Hacker News reader built end to end: a typed API layer, a persisted offline query cache, Expo Router navigation, and feature folders with one ViewModel hook per screen.
Cross-platform app on the official architecture
A recipe finder structured with MVVM per Flutter's official architecture guide — Riverpod 3 for state, go_router for navigation, Dio and freezed for the data layer. Runs on iOS, Android, and web.
No-oversell booking API on AWS
A serverless booking API where concurrent requests for limited seats resolve without overselling, via conditional DynamoDB transactions. Cognito auth, EventBridge and SQS for events, a Step Functions waitlist, and scheduled reminders. Infrastructure as code with AWS CDK.
One Bluetooth LE profile, three codebases
An ESP32 (M5Stack CoreS3) firmware with native Android (Kotlin, Compose, Hilt, Room) and iOS (SwiftUI, Swift 6, SwiftPM) apps over Bluetooth LE: live telemetry, touch events, passkey pairing, LED control, messaging, motion, session recording and history, and signed firmware updates over the air. Android is tested on a real board; iOS is tested against the simulated board, not yet a real one.
Demos run on free tiers and may cold-start for a second. Demo data resets periodically. For a walkthrough of any of these, get in touch.