Everything here came from my own hands: built, learned and documented. Code, interface and architecture decisions open for anyone to dig into.
Authorial project · Open Source
Learning platform with study trails, playlists and video lessons. It is where I learned, hands on, Clean Architecture on the Express API, dependency injection, permission level RBAC and GraphQL Federation.
Next.js 15 · React 19 · Express · NestJS · GraphQL Federation · Prisma 6 · PostgreSQL · TypeScript · Firebase Auth · Zod
Created August 2021 · Restored August 2026
Authorial project · 2026 restoration
Play and earn game from 2022 that I restored from scratch applying Clean Architecture, Either for explicit errors and strict TypeScript, with a pluggable driver between sandbox and real BSC blockchain and E2E across all 55 routes.
React 19 · Vite · Express 5 · Prisma 6 · PostgreSQL · ethers v6 · TypeScript strict · zod · Docker
Created December 2021 · Restored August 2026
Authorial project
Technology radar that filters and contextualizes signals with verified sources. There I deepened production Next.js, publishing through an authenticated Zod-validated Lambda and S3 infrastructure described in Terraform.
Next.js · TypeScript · AWS · Terraform · MCP · IA
Study project · Open Source
Payment service inspired by the classic Pagar.me challenge where I trained SOLID, TDD and DDD hands on: debit and credit with scheduled payables, value objects with Either and balances covered by Vitest tests.
Node.js 22 · TypeScript strict · Express 5 · Zod 4 · Vitest 4 · date-fns · tsup
Created April 2023 · Restored August 2026
NPM · Open Source
Tool published on npm that translates i18n files with AI without breaking placeholders. With it I learned translation caching, parallel processing, retry with backoff and automatic key validation.
TypeScript · Node.js · OpenAI · Anthropic · Gemini · DeepSeek · CLI
Open Source
Infrastructure as code where I learned to structure Terraform and Terragrunt at scale: modules without hardcoded values, identical environments in a single env.hcl and a full cycle on LocalStack at no cost.
Terraform · Terragrunt · LocalStack · AWS
Created May 2026
Study project · Open Source
Subscription blog from the Ignite program that I modernized in 2026: Stripe with signed webhook, next-auth, ISR from Prismic, FaunaDB to Prisma migration and Playwright E2E tests.
Next.js 16 · React 19 · TypeScript strict · Stripe · next-auth · Prisma 7 · Prismic CMS · zod · Playwright
Created May 2022 · Restored August 2026
Study project · Open Source
Real time Q&A rooms from NLW 6 that I restored with Firebase Auth and Realtime Database, security rules for unique likes, live moderation and validation with react-hook-form and Zod.
React 19 · TypeScript · Vite 8 · Firebase 12 · react-hook-form · zod · Sass
Created June 2021 · Restored August 2026
