Manuel Chica Piñera

Full Stack developer with professional experience. Backend in Java and .NET, frontend in React and Vue. I am interested in software architecture, well-designed APIs and CI/CD.

1. Jun 2025 – Jul 2025Internship · Remote

   Software developer · Vertebra Gestión

   • Backend features in C#/.NET on SQL Server for a business management application in production.
   • Digital signatures and document generation with X509 certificates (FacturaE standard).
   • Work in a multi-person team with Git and code reviews, delivering assigned tasks on time.

1. P-01Solo

   Lacre

   Open-source Veri*Factu invoicing component.

   Open-source component for issuing invoices that comply with the Spanish Tax Agency’s Veri*Factu system.

   • Java
   • Spring Boot
   • PostgreSQL
   • Thymeleaf
   • Docker
   • GitHub Actions
   • JUnit 5
   • Testcontainers
   • ArchUnit
   • jqwik
   • WireMock
   • PIT

   Code · Lacre (opens in a new tab)5stars1forks

2. P-02Bachelor's thesis · grade 10/10

   GaiaTool

   AI-powered sustainability report generator following the EU CSRD.

   Bachelor’s thesis: a tool that generates sustainability reports with artificial intelligence following the EU CSRD directive.

   • JavaScript
   • OpenAI
   • Vue.js

   Code · GaiaTool (opens in a new tab)

3. P-03Team

   SegundUM

   Second-hand marketplace platform.

   Second-hand marketplace built as a team, with Spring Boot and .NET services communicating over REST and RabbitMQ, OAuth 2.0 authentication with JWT and a React client.

   • Spring Boot
   • .NET
   • REST
   • RabbitMQ
   • MySQL
   • MongoDB
   • Docker
   • OAuth 2.0
   • JWT
   • JavaScript
   • React
   • Bootstrap

   Code · SegundUM (opens in a new tab)

4. P-04Solo

   Personal Data Hub

   Aggregates the GitHub, Strava and Steam APIs into a single dashboard.

   Full stack application: an event-driven Spring Boot backend brings together data from the GitHub, Strava and Steam APIs and a React frontend shows it in a single dashboard, with PostgreSQL and Docker.

   • Spring Boot
   • React
   • REST
   • PostgreSQL
   • Docker

5. P-05Solo

   OBD-Map

   Android GPS navigator connected to OBD-II scanners over Bluetooth.

   Android GPS navigation app, with Mapsforge maps and GraphHopper routing, that connects to the vehicle’s OBD-II scanners over Bluetooth.

   • Android
   • Java
   • Bluetooth
   • Mapsforge
   • GraphHopper

   Code · OBD-Map (opens in a new tab)

Other projects

• P-06>_

  AppChat

  Messaging application in Java.

• P-07>_

  NanoFiles

  Peer-to-peer file sharing system in Java.

• P-08>_

  Dig-a-Mole

  Language learning application in Java.

• P-09>_

  Mini-C

  Compiler for a subset of C.

• P-10>_

  Linux services

  HTTP/HTTPS, DNS and WebMail administration on Linux.

Send me an email or find me online.

hola@manuelchica.dev

• GitHub (opens in a new tab)
• LinkedIn (opens in a new tab)

Murcia, Spain