Alejo Castillo González

Email: alejoworkstuff@gmail.com | Phone: +54 9 221 613‑3317 | LinkedIn: linkedin.com/in/alejo-castillo-0b02b73b0 | GitHub: github.com/alejosworkstuff

Portfolio: alejosworkstuff.github.io/portfolio | Location: La Plata, Buenos Aires, Argentina

Alejo Castillo profile photo

Professional Summary

Entry-level Full-stack Developer focused on building clean, user-first web applications with strong fundamentals in frontend and backend development. Experienced shipping end-to-end projects using Next.js, React, TypeScript, Node.js, and serverless APIs—with Clerk auth, resilient HTTP layers, Sentry observability, and Playwright E2E in CI.

Technical Skills

Projects

Mini Ecommerce

  • Built a full ecommerce app with catalog, cart, checkout stepper, and order history on Next.js 16 App Router with Clerk auth and protected routes.
  • Shipped a typed HTTP client with timeout/retry, SSG/ISR product catalog, Redis cart sync, Prisma + Postgres order persistence, REST and GraphQL APIs, and WebSocket order-status updates.
  • Added Sentry error boundaries, structured logging, Vitest/Testing Library tests, and Playwright checkout E2E in GitHub Actions CI.

AI Story Generator

  • Developed a prompt-based story generator using Node.js serverless API routes and Replicate (Llama 3).
  • Built resilient client HTTP layer with timeout/retry and typed errors; explicit 402 handling with deterministic local fallback stories.
  • Added GitHub Actions CI (syntax, API/fallback tests) and Playwright E2E for the generate flow with mocked API.

Education