Languages

  • JavaScript (ES6+) — async/await, closures, module systems, large-scale app architecture
  • TypeScript — generics, union/intersection types, type-safe API contracts
  • HTML5 & CSS3 — semantic markup, ARIA/WCAG 2.1 AA, Flexbox/Grid, Tailwind CSS
  • Go — CLI tools, high-performance services, standard library
  • Swift — native iOS with MVVM, Combine, UIKit/SwiftUI
  • Kotlin — Android with coroutines, Jetpack libraries

Frameworks & Libraries

  • React — hooks, context API, Server Components, render optimization
  • Next.js — App Router, SSR/SSG/ISR, streaming, full-stack architecture
  • Redux — Redux-Saga/Thunk, reselect, large-scale state management
  • GraphQL — Apollo Client/Server, schema design, query optimization
  • Framer Motion — declarative animations, gestures, layout transitions

Mobile

  • React Native — cross-platform iOS/Android, native module integration, React Navigation
  • Expo — managed/bare workflow, EAS Build, App Store + Play Store deployment
  • React Native Reanimated — native-thread animations, gesture-driven UI
  • Swift / SwiftUI — native iOS, performance-focused, MVVM
  • Kotlin / Jetpack — native Android, coroutines, modern architecture components

Data

  • PostgreSQL — relational modeling, query optimization, indexing
  • Redis — caching, pub/sub, session storage
  • Prisma — type-safe ORM, schema migrations, multi-DB support

Tools & DevOps

  • Git — feature branching, rebasing, pull request workflows
  • CI/CD — GitHub Actions, GitLab CI/CD, automated testing and deployment pipelines
  • Docker — containerization, Docker Compose, consistent dev/prod environments
  • Monorepo — Turborepo, workspace management, multi-package builds
  • Vite — fast bundling, build optimization, ESLint/Prettier

Testing

  • Jest — unit and integration testing, mocking, high coverage React/Node.js apps
  • React Testing Library — user-centered component testing, accessibility
  • Cypress — end-to-end UI automation

UI/UX & Design

  • Figma — pixel-perfect implementation from high-fidelity designs
  • Storybook — isolated component development, shared design systems
  • Accessibility — WCAG 2.1 AA, ARIA, screen reader testing
  • Web Vitals & Lighthouse — LCP, FID, CLS optimization; lazy loading, code splitting

Real-time & Communication

  • WebSockets — Socket.io, Supabase Realtime, event-driven architecture
  • REST & GraphQL APIs — design, versioning, secure authentication flows

Observability & Security

  • Observability — Sentry, Datadog, OpenTelemetry; error tracking and alerting
  • OWASP Top 10 — secure API design, input validation, auth best practices
  • Auth — OAuth, JWT, HTTPS, secure cookie management