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François A.FA

François A.

Full Stack Web Developer Java Spring Boot

€350/day
16 projects
Madrid, ES
15+ years

Average response time: 24 hours

Freelancer profile translated to English.
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About François

Hello 👋,

I am a Full-stack Java developer with over 20 years of experience.

I offer two main services:

1️⃣ Comprehensive Development of Platform-type Web Projects

I develop applications and websites using a wide range of modern and established technologies:

👉 Java, Spring Boot, REST API
👉 Angular 21, Svelte, Sveltekit, React
👉 Bootstrap, Tailwind
👉 Integration of external APIs
👉 Integration of payment gateways
👉 PostgreSQL / MongoDB / Oracle
👉 Vercel - GCP - AWS

I take pride in designing ergonomic, robust, fluid, easy-to-maintain, and efficient products, while also supporting my clients in their strategic and technical analysis. My profile, combining back-end development, front-end development, and UX/UI experience, allows me to offer a comprehensive approach to creating digital products.


2️⃣ Development within an Agile Team for Large Companies

👉 For projects lasting several weeks or months, full-time (office hours) or part-time
👉 Development of REST APIs, microservices, MVC, EDA, reactive programming...
👉 Full development, new features, auditing, refactoring, migration with technology changes
👉 Current technologies: Java, Spring Boot, Angular 21, PostgreSQL, Hibernate, Kafka, Svelte, React, Angular, Vue, ...
👉 Past technologies: J2EE environment, servlets, jsp, play framework, Jersey 2, Php, Cobol, Oracle, etc.
👉 Dev ops: CI/CD, Jenkins, Ansible, Kubernetes, Bitbucket pipelines, GitHub Actions, ...
👉 Security, performance, testing...
👉 Agile methodologies: Scrum, Kanban, Jira, etc.

💪
In all my projects, I place particular emphasis on security, performance, and maintainability (choice of technologies, clean code, documentation, etc.).

Do not hesitate to contact me to discuss your development needs!
  • Spanish

    Native or bilingual

  • French

    Native or bilingual

  • English

    Fluent

  • German

    Conversational

Can work on-site
Madrid (up to 50km), Zaragoza (up to 20km)

Experience

  • Enel
    Microservices Orchestration
    ENERGY AND UTILITIES
    October 2025 - February 2026 (4 months)
    Sevilla, Spain
    Orchestration of 400+ microservices in Apache Camel, Spring Boot, Java 21, Angular, REST API environment. Occasional support for developing new features, bug fixing, and testing in microservices. PostgreSQL database.
    Use of Rancher, Liquibase, Bamboo, OpenAPI, etc...
    Agile teamwork.
    Apache Camel Spring Boot Java Liquibase Angular
  • Portal asesoramiento juridico
    SAAS Platform Development
    REAL ESTATE
    September 2024 - July 2025 (10 months)
    Madrid, Spain
    Full-stack development of a contract management and advisory platform in the real estate sector. REST API in Java / Spring Boot for the back-end and Svelte for the front-end. PostgreSQL database. Development of the entire project from analysis to production deployment (CI/CD).
    Spring Boot REST API Svelte JavaScript PostgreSQL
  • Portal Coinversion
    Co-investment Platform Development
    REAL ESTATE
    February 2024 - June 2024 (4 months)
    Madrid, Spain
    Development of a real estate co-investment platform. Java REST API as back-end and Svelte as front-end.
    Java Spring Boot Svelte REST API

Reviews

4.9

Out of 11 ratings

J

Juan

Amfis inv, S.L.

Reviewed on 5/31/2024

Again, we have successfully completed the project proposed to Francois, who has been able to exceed all expectations. His experience and professionalism are excellent, and he is the right profile for any company looking to develop or improve a web project at a professional level. Francois is a professional in the sector and I recommend him to anyone who has a serious business project and wants to give the place it deserves to their online channel. In our case, he has developed a brilliant web application, both at the user and administration level.
J

Juan

Amfis inv, S.L.

Reviewed on 2/26/2024

The entire process with Francois, from the first meeting to the delivery of the work, has been perfect. He is a professional who fully masters all phases of development and, from the beginning, he contributed his experience and vision to improve the project we had in mind. On my part, I must totally recommend Francois as it is difficult to find a profile of his experience and professionalism in this field. We have dedicated many resources to the project, interacted with many developers, and I must say that it was a complete success to develop this project with him.

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Education

  • Apache Spark Course: Processing Big Data
    Openwebinars.net
    2023
    https://openwebinars.net/cert/WYTO?r=cf13f7234&t=1685624087
  • Big Data Course
    Openwebinars.net
    2022
    https://openwebinars.net/cert/OMeX2?r=cf13f7234&t=1685624087

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