Visual testing - catch invisible buttons, broken layouts, contrast

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

Core Supabase CLI, migrations, RLS, Edge Functions

Shopify app development - Remix, Admin API, checkout extensions

OWASP security patterns, secrets management, security testing

Reddit Ads API - campaigns, targeting, conversions, agentic optimization

React web development with hooks, React Query, Zustand

Python development with ruff, mypy, pytest - TDD and type safety

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

Microsoft Teams bots and AI agents - Claude/OpenAI, Adaptive Cards, Graph API

Medusa headless commerce - modules, workflows, API routes, admin UI