Featured projects

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  COMPLETED

  Portfolio

  Personal portfolio at jmrg.dev. Next.js 16 with the App Router and React 19, in Spanish and English with translated routes, every piece of content served from the REST API and nothing hard-coded.

  Next.js · React · TypeScript · Tailwind CSS · next-intl · Playwright

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  COMPLETED

  Portfolio API

  Private REST API that serves every piece of content on jmrg.dev: posts, projects and the per-language CMS documents. Fastify 5 over HTTP/2, Mongoose 9 and separate public and admin queries, with Clerk authentication on every route except the health check and the preflight.

  Node.js · TypeScript · Fastify · MongoDB · Mongoose · Clerk

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  COMPLETED

  Express Clean Backend

  Production-ready Node.js/TypeScript template: strict hexagonal architecture, Keycloak OIDC, CQRS-lite, S3, Traefik 3.7 with ACME, and a Loki/Grafana/Prometheus stack.

  Node.js · TypeScript · Hexagonal Architecture · Clean Architecture

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  COMPLETED

  Image Processing API

  Enterprise-level image processing system with microservices architecture. Implements Clean Architecture, CQRS and Event-Driven Architecture. Backend Sr. Technical Test for KairosDS.

  TypeScript · Node.js · Express.js · MongoDB · Redis · BullMQ

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  COMPLETED

  Pokédex Next

  Interactive Pokédex built with Next.js 15, TypeScript and T3 Stack. Consumes PokéAPI v2 in real-time with listings, type/generation filters, predictive search, detail with evolutions and stats. Optimized with in-memory and Redis caching.

  Next.js · React · TypeScript · tRPC · Prisma · PostgreSQL

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  COMPLETED

  Stripe Payments App

  Payment application integrated with Stripe API. Credit card processing, promotional codes system and multi-currency support with secure checkout.

  Node.js · JavaScript · Stripe · Express.js · HTML · CSS