maggy

Progressive Web Apps - service workers, caching strategies, offline, Workbox

E2E testing with Playwright - Page Objects, cross-browser, CI/CD

Android Kotlin development with Coroutines, Jetpack Compose, Hilt, and MockK testing

Mandatory code reviews via /code-review before commits and deploys

Mobile UI patterns - React Native, iOS/Android, touch targets

PostHog analytics, event tracking, feature flags, dashboards

Flutter development with Riverpod state management, Freezed, gorouter, and mocktail testing

Next.js with Supabase and Drizzle ORM

Android Java development with MVVM, ViewBinding, and Espresso testing

Core Supabase CLI, migrations, RLS, Edge Functions

Prevent semantic code duplication with capability index and check-before-write

User experience flows - journey mapping, UX validation, error recovery

React Native mobile patterns, platform-specific code

AWS DynamoDB single-table design, GSI patterns, SDK v3 TypeScript/Python

Klaviyo email/SMS marketing - profiles, events, flows, segmentation