I build maintainable web products across frontend and backend, with a focus on responsive interfaces, REST APIs, reliable integrations and automated testing.
- Full stack developer with professional experience building and maintaining web applications with React, Next.js, TypeScript, JavaScript, Python and Flask.
- I create responsive, component-driven interfaces, manage client and server state, integrate REST APIs and work with relational and document databases.
- I also develop transactional email interfaces designed to render consistently across different providers, using tools such as Resend.
- I value maintainable code, automated tests and collaborative delivery through TDD, Scrum and Kanban.
- Frontend engineering: React, Next.js, TypeScript, Vite, CRACO, PugJS, React Hook Form, TanStack Query, Zustand, Axios, next-intl, shadcn/ui, HeroUI, Tailwind CSS, Sass and CSS.
- Backend development: Python, Flask, Node.js and REST API integrations, with Auth.js, Google OAuth, JWT sessions, Zod validation, PDFKit and payment workflows using Mercado Pago.
- Data and delivery: PostgreSQL, Neon, MongoDB, Supabase, Vercel and Cloudflare Workers, with R2 caching, Browser Rendering, OpenNext and Wrangler; CircleCI, GitHub Actions, Linux and Windows development environments.
- Quality engineering: unit, integration and end-to-end testing, TDD, Jest, Vitest, Testing Library, Puppeteer and Cypress, working within Scrum and Kanban teams.
- Email development: responsive transactional email UI, cross-client compatibility and delivery workflows with Resend.
| Area | Technologies |
|---|---|
| Frontend | React, Next.js, TypeScript, JavaScript, Vite, Zustand, TanStack Query, React Hook Form, Tailwind CSS, Sass |
| Backend | Python, Flask, Node.js, REST APIs, Auth.js, OAuth 2.0, JWT, Zod, PDFKit, Mercado Pago |
| Data & Platform | PostgreSQL, Neon, MongoDB, Supabase, Vercel, Cloudflare Workers, Cloudflare R2, Cloudflare Browser Rendering, Linux |
| CI/CD & Workflow | CircleCI, GitHub Actions, OpenNext, Wrangler, pnpm, TDD, Scrum, Kanban |
| Testing | Jest, Vitest, Testing Library, Puppeteer, Cypress, unit testing, integration testing, E2E testing |
1e99 is my app ecosystem built on Cloudflare Workers, using OpenNext to run Next.js and Wrangler for deployment.
- App portal: React, TypeScript, Tailwind CSS and next-intl, with Portuguese, English and Spanish content, Google sign-in through Auth.js, shared sessions across subdomains and incremental caching in Cloudflare R2.
- Currículo na Mão: a resume builder with React Hook Form and Zod validation, serverless PostgreSQL on Neon, PDF generation with Cloudflare Browser Rendering/Puppeteer and PDFKit, and payment integration with Mercado Pago.
- Quality: Vitest and Testing Library in the resume app, plus Node.js tests for the portal's authentication, Cloudflare configuration, accessibility and SEO.
I'm currently deepening my backend knowledge with Go (Golang) and studying Fiber, Gin, Chi, GORM, go-playground/validator, authentication, JWT and API security. My focus is learning how to design secure, well-tested and maintainable APIs.
I'm interested in conversations about full stack development, frontend engineering and my growing path into Go backend development. Reach me through LinkedIn, my website or email.