Hey, I'm Álvaro

Career path

Work experience

1. FullStack Engineer

   Mitte

   March 2026 - Present

   Working as FullStack (NestJS + Vue).

   • Environment unification: AWS, LocalStack, Docker and MinIO.
   • Development: implementation and maintenance of FullStack features in NestJS and Vue applications.

   • NestJS
   • Vue
   • AWS
   • LocalStack
   • Docker
   • MinIO

2. Founder & Backend Engineer

   AlveoForge

   September 2025 - Present

   Founder and developer of AlveoForge (alveoforge.com): a platform for deterministic automatic generation of Hexagonal Java Spring Boot backends from SQL. Responsible for the full cycle; Java 25, CRUD, JWT, tests and OpenAPI. Multi-DB SQL/MongoDB/Redis, outbox; modular monolith with vertical slicing or microservices. Generator with 95–100% test coverage + E2E; Maven profiles. Documentation on request. Launch: July–August 2026.

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   • Java 25
   • Spring Boot
   • Hexagonal Architecture
   • SQL
   • MongoDB
   • Redis
   • JWT
   • OpenAPI
   • Maven
   • E2E Testing

3. FullStack Engineer

   AEInnova Spain

   April 2024 - March 2026

   Working as FullStack (Java Spring Boot + Angular).

   • Angular application unification: merged two Angular 8 applications into a single modular and scalable Angular 18 application, independently compilable for each web mode (including cleaning the code and releasing the package of both apps).
   • Technical leadership: acting as senior developer and team leader of Frontend and Backend, with full project documentation and mentoring of trainees and junior developers.
   • TypeScript migration: added TypeScript to both applications, fixing +140k typing errors.

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   • Architecture and performance: componentized the macro application, separated and cleaned up modules and applied clean design and architecture patterns across the whole app.
   • Visual redesign: rebuilt the entire CSS from scratch, modularizing it and implementing nesting (removing all !important), light/dark mode and a reactive color palette system where the user can create and switch palettes for the whole site.
   • Charting system: built from scratch with Chart.js, customizing a large number of charts, plugins and features, with complete documentation (behavior, plugins, data flow and cache).
   • Database optimization: restructured, cleaned and normalized the PostgreSQL database (90+ tables), adding all FKs and iterating the model for new requirements, improving performance and scalability.
   • Backend refactoring: migration and creation of a new backend in hexagonal architecture based on microservices with Java Spring Boot.

   • Java Spring Boot
   • Angular
   • TypeScript
   • Chart.js
   • PostgreSQL
   • Hexagonal Architecture
   • Microservices

4. Senior Backend Engineer

   Better Consultants Spain

   March 2024 - April 2024

   • APX
   • Responsible for implementing new features in the Backend using Java Spring

   • Java Spring Boot
   • Java APX

5. +750h FullStack Practices

   Applus+ IDIADA

   October 2022 - March 2023
   • Responsible for implementing new features in the Backend using Java Spring
   • Responsible for implementing new features in the Frontend using Angular and Typescript

   • Java Spring Boot
   • Angular
   • Typescript
   • Hexagonal Architecture

6. Assistant University Professor

   University of Barcelona

   January 2023 - April 2023
   • Refactor all the code of the course project using an MVC architecture
   • Implement communication with the local SQLite database
   • Implement all CRUDs, making them flexible and scalable for future changes in the course
   • Build the course database
   • Add all data to the database

   • Java
   • Java FX
   • SQLite
   • MVC

Studies

Education

1. Master's in Computer Engineering

   UOC · Universitat Oberta de Catalunya

   2026 - 2028

   Currently studying.

2. Computer Engineering

   University of Barcelona

   2019 - 2023

   Final degree project on microservices and microfrontends (Java Spring Boot with Hexagonal architecture + Angular / Vue / React). Grade: Excellent.

   • Java Spring Boot
   • Hexagonal Architecture
   • Angular
   • Vue
   • React

Selected work

Projects

AlveoForge

• Java 25
• Java Spring Boot
• Hexagonal Architecture
• Vertical Slicing
• PostgreSQL
• MongoDB
• Redis
• JWT
• OpenAPI
• 100% tests

AlveoForge (alveoforge.com): a factory that generates production-ready Java backends from a SQL schema. Hexagonal architecture with vertical slicing and a 95–100% tested foundation for every domain entity, delivered in days instead of months. The same schema as a modular monolith or microservices, with no lock-in; multi-DB (PostgreSQL/MongoDB/Redis) with outbox pattern, JWT and OpenAPI. Validated on a real 300+ table schema.

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DeepKnowlege: Microservices and Microfrontends

• Java Spring Boot
• Single-SPA
• Angular
• React
• Vue
• JavaScript
• HTML
• CSS
• Translations i18n
• Hexagonal Architecture
• JWT
• Config Server
• Gateway
• Payment Gateway
• Vault Secrets
• AWS EC2
• Rabbit MQ (soon)
• Chat Translation (soon)

Udemy-style website providing a site where users can share courses and their own publications using microservices and microfrontends.

Konglomerate - Instagram/Twitter Style Website

• Vue
• JavaScript
• HTML
• CSS
• Python
• Heroku

Konglomerate was a website developed as a university project by a team of 7. We worked with Agile methodology, and I actively participated in setting up the initial project structure and configuring it with another colleague (DevOps). Then, I worked with two colleagues on the backend side, designing the database and developing the CRUDs. I then moved on to the frontend side, where I was in charge of fixing some bugs and implementing other features with two other colleagues. Finally, I returned to the more DevOps part by setting up the environment for deployment to production on Heroku.

Who I am

About me

My name is Álvaro Guillén González. I wrote my first scripts at 14, back in school, and today I build full-stack web applications for a living.

One thing I'm proud of: as an Assistant Professor at the University of Barcelona, I built the SQLite integration, CRUD and data layer for a Design Patterns (MVC) course — and that code is still in use there today.

For my final degree project (TFG) I took on one of the biggest challenges of my studies: teaching myself to apply software and architectural patterns at the level companies are actively hiring for.

Since then I've built web applications around architectural patterns that keep code scalable at enterprise level, and I'm always pushing that expertise further.

Let's talk

Shall we build something together?

I'm available for freelance projects and new opportunities. Drop me a line and I'll get back to you soon.

alogugo303@gmail.com·es.linkedin.com/in/alvaroguillengonzalez·github.com/AlvaroGuGo303