Full-Stack Developer

Javier Mateo

I build web applications end to end with Angular, TypeScript, Node.js and Spring Boot. Master's in Full Stack Development from UNIR, now looking for my first developer role.

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About me

Who I am

I started out with systems and networks, moved on to multiplatform application development and went on to complete a Master's in Full Stack Development at UNIR.

I enjoy building things end to end: designing the API, modelling the database and polishing the interface. I'm looking for my first full-stack role, on a team where I can keep learning and contribute from day one.

Languages: Spanish (native) · English (C1)
Education: Master's in Full Stack · UNIR
International experience: Erasmus internship in Italy

Experience

Intern
Viewnext · Spain
- Designed and built an access and ticket management portal with ASP.NET Core and SQL Server, improving how internal incidents were handled.
- Administered Azure servers, keeping track of vulnerabilities and versions.
- ASP.NET Core
- SQL Server
- Azure
Intern · Erasmus programme
Invisible Farm S.R.L. · Italy
- Administered the database and website of Lombardy's public health service with PHP.
- Migrated websites with Drupal, keeping the service running and well optimised.
- PHP
- Drupal

Education

2025 – 2026
Master's in Full Stack Development
International University of La Rioja (UNIR)
2025 – 2026In progress
Master's in AI-Assisted Development
Big School
2023 – 2025
Higher National Diploma in Multiplatform Application Development
Escuela Vedruna Sevilla
2020 – 2023
Vocational Diploma in Microcomputer Systems and Networks
IES Martínez Montañés

GitHub activity

Selected projects

Things I've built

Personal project · Windows & web

Diaryo

An infinite diary for your PC: every day is a double page with no edges to write, draw, stick notes and connect ideas with arrows. It pops up over the desktop with a shortcut and also runs in the browser.

Custom Canvas 2D engine: pencil, highlighter, text, sticky notes, shapes and arrows that stay attached to what they connect
Desktop app built with Tauri and Rust: a floating diary on Ctrl+Alt+D, tray icon, daily backups and automatic updates
Optional end-to-end encrypted cloud: the server only stores unreadable data, and it keeps working offline
English and Spanish, light and dark theme, and a web version that also works by touch on phones

TypeScript
React
Canvas 2D
Tauri
Rust
Vite
IndexedDB

Website & download ↗Try it in the browser ↗GitHub ↗

Social app · Flutter

Beer League

A social app where groups of friends compete by logging their drinks, with seasons and tournaments.

Monthly seasons and tournaments with point multipliers
Live leaderboard for each group of friends
Native Android widget to check the leaderboard

Flutter
Dart
Firebase
Cloudinary
Provider

GitHub ↗

Terrace · Sevilla

Tomorrow · Thu 24 Sept

Live

Lunch · 13–16 h

Open

89/100 · capacity 100 %

Dinner · 20–23 h

Open

96/100 · capacity 100 %

Feels like 35 °C (too hot)Data: Open-Meteo

Public API · Java Spring Boot

Terrace Weather API

A free REST API, no key required, that turns the weather forecast into a decision: whether a restaurant should open its terrace, hour by hour.

OPEN / CAUTION / CLOSED verdict and recommended capacity for every time slot
Weighs rain, wind and feels-like temperature, with profiles tuned to the local climate and equipment
Checks up to 25 bookings for a day in a single call and suggests the best time
Interactive documentation with Swagger and OpenAPI