PulseFi
Astro React Convex Python
Public financial visualization — interactive charts, IPO calendar, and market news. Read-only MVP with Astro, React, and Convex.
Sergio Flores
Information Systems Engineering student at Universidad Politécnica de Madrid 
upm.es UPM Escuela Técnica Superior de Ingeniería de Sistemas Informáticos
and software engineering student at 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.
Currently building production-grade AI products at Zaltor. 
zaltor.com Zaltor — Software Distribution Servicios Gestionados, Ciberseguridad, Backup y MSP.
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 Cloudflare IntelliJ IDEA VSCode PostgreSQL MySQL SQLite Supabase
Work
Where I’ve spent my time.
Jul. 2026 – Present
Spain, Full-time
Following the internship, continued at Zaltor full-time to take the work further. Leading the development, design, and deployment of multiple AI products: some internal, some public-facing. The stack includes React and Astro on the frontend, paired with backend services and deployment pipelines. Still shipping features, maintaining production systems, and iterating fast — all while keeping the architecture clean and reliable.
TypeScript React Astro Python Docker
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).
42-cursus
C Python Makefile
Peer-to-peer, gamified learning through real technical challenges. The repository with every project I build at 42 Madrid.
a_maze_ing
Python Algorithms Data Structures
Maze generator and solver library implemented in Python exposing a simple API.
Forahome
Java Astro PostgreSQL Docker
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 :(.