My personal space on the web. This very portfolio, built with Astro and Tailwind, deployed on Cloudflare.
Sergio Flores
Computer Science student at Universidad Politécnica de Madrid 
upm.es UPM Escuela Técnica Superior de Ingeniería de Sistemas Informáticos
and 42 Madrid. 
42madrid.com 42 Madrid Fundación Telefónica
Methodical by nature — I care about how software is built as much as what it does.
I gravitate toward backend, systems architecture, and production-grade infrastructure. On the product side I think a lot about efficiency and accessibility — building tools that fit the people using them, as far from generic software as possible.
Tech Stack
The tools I reach for (and the ones I tolerate).
Java Python C TypeScript JavaScript Spring Boot Astro Node.js Bun Hono React Git GitHub Docker Linux Postman IntelliJ IDEA VSCode PostgreSQL MySQL SQLite
Work
Where I’ve spent my time.
Feb. 2026 – Jun. 2026
Spain, Internship
Led the end-to-end development of the company's corporate document intranet — from initial design and architecture decisions through production deployment. Built the backend with Hono and SQLite, and the frontend interface with Astro and Svelte, keeping the stack lightweight. Also designed a Markdown-based RAG engine from scratch to give the company's internal AI assistant up-to-date knowledge about internal documentation.
TypeScript Astro SQLite Bun Node.js
Projects
Things I’ve built (or am still building).
Peer-to-peer, gamified learning through real technical challenges. The repository with every project I build at 42 Madrid.
Maze generator and solver library implemented in Python exposing a simple API.
Higher Degree final project. A platform to request home services: plumbers, electricians, etc... in a simple and direct way.
About
I'll write something when I feel inspired :(.