JMRG - Senior Full Stack Developer
Portfolio of Jesús María R.G. - Senior Full Stack Developer specialized in MERN Stack, IoT and scalable architectures.
Senior Full Stack Developer (MERN) specialized in Node.js Backend & IoT with over 5 years of experience. Expert in Clean Architecture, Microservices and cloud optimization (GCP/AWS). As a Forward Deployed Engineer I take that foundation to the field: agents with RAG over in-house business rules, and platform as code with Terraform, AWS CDK and Cloudflare under a DevSecOps approach.
My career started in pure electronics, managing telecommunications and low-level systems, from where I naturally evolved into software development.
«I seek simplicity and robustness. Good code is not the most complex, but the one that solves the problem without creating new ones.»
When integrating hardware and software, my priority is system stability and maintainability. I analyze the context, choose the right tool for each case without chasing tech trends and focus on delivering solutions that work well technically and bring real value to the project.
Senior Full Stack Developer
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
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 · Zod · Docker
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
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 · Docker · Sharp · Clean Architecture · CQRS
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 · Redis · Tailwind CSS · Docker · Zod
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
Excellent professional in the software area in which he works. He has vast technical and specialized knowledge, as well as excellent soft skills that complement his professional profile.
A proactive professional, with excellent performance in his professional field with both Hardware and Software.