Freelancer profile translated to English.

Description

Java Backend / Spring Boot Developer – 8 years of experience

Hello, my name is Matthias and I help companies design, develop, and maintain **reliable and scalable Java back-end APIs**.

With a Master's degree in Software Engineering and6 yearsof experience in IT consulting firms, I specialize in Java back-end development and integration with relational databases.

🔧 What I do for my clients:

Design and development of robustREST APIsinJava / Spring Boot
Modeling, design, and optimization ofSQL databases (PostgreSQL, MySQL, other RDBMS)
Integration of the back-end withexisting frontends(web or mobile)
Implementation of software quality best practices(tests, code reviews, design patterns)

🧱 Key technical skills:

Language:Java (OOP, Java 8+)
Back-end:Spring / Spring Boot,REST APIs, web services
Database:SQL, schema design, optimized queries
Web: Solid understanding ofHTML / CSS / JavaScriptandAngularto collaborate effectively with front-end teams
Tools: Git (**GitHub** ), version control, teamwork

🎯 What I am looking for:

I prefer long-term missions inJava back-enddevelopment, with or withoutJava / Angular full-stackcomponents. My primary experience is in the banking sector, butI am open to all types of industries(SaaS, industrial, services, startup, etc.).

If you need areliable, pedagogical, and autonomous back-end developerto strengthen your team or take charge of a project, let's discuss it.

👉 Send me a message with a brief description of your needs, I will respond quickly.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Bordeaux (up to 50km), Paris (up to 50km), Tours (up to 50km), Toulouse (up to 50km), Poitiers (up to 10km)

Alignerr
Developer
TECH
July 2025 - Today (1 year and 1 month)
Mérignac, France
As a freelance developer, I analyze and provide feedback on code generated by artificial intelligence to improve models:
Analysis of code generated by Artificial Intelligence in Java and Cobol
Development of fixes in cases where programs were incorrect or incomplete
Writing technical documentation providing areas for program improvement to enable AI models to enhance.
Java COBOL English Agile methodology SQL
CGI
Information Technology Engineer
DIGITAL AND IT
May 2017 - June 2023 (6 years and 1 month)
33185 Le Haillan, France
In the banking sector, design and development of Java components for 5 years:
Analysis of client requests in an agile environment to determine their feasibility and cost.
Design of requested applications respecting SOLID design principles and planning of unit tests in TDD.
Development of back-end parts in Java, including the development of an internal framework to optimize the development process of this part. The Java parts linked to SQL databases.
Development of front-end parts in various languages depending on the requests: these were either Java interfaces, or in web languages HTML, CSS and JavaScript, or even in Angular.
Execution of unit tests following the methodology and cases defined during the design.
Design and development of a SonarQube plugin allowing the review and display of pre-analyzed code in a new interface.
Still in the banking sector, development of Cobol programs for 1 year:

Missions carried out in V-cycle.
Planning of unit tests in TDD following technical documentation.
Development of programs in Pacbase and Cobol following technical documentation.
Execution of pre-designed unit tests
SQL Angular Java Spring boot JAVA/JEE;

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Master's degree, Computer Science with honors
University of Bordeaux
2017
Le Master Informatique vise à former des informaticiens susceptibles d'exercer un métier d'ingénieur d'études ou d'ingénieur en développement, éventuellement spécialisés dans un domaine d'application en fonction des parcours choisis. Il prépare également à une insertion professionnelle dans une équipe de recherche publique ou privée, soit comme ingénieur, soit comme doctorant. Sur le plan scientifique, l'objectif de la formation est de garantir une solide culture en informatique générale, complétée par des enseignements spécialisés en fonction du projet professionnel de l'étudiant. Afin de garantir au diplômé la nécessaire capacité d'adaptation tout au long de la carrière aux évolutions constantes de la discipline et des technologies, un fort accent est mis sur les concepts fondamentaux et sur les aspects génériques plus que sur des technologies ponctuelles. Sur le plan méthodologique, la formation prépare à participer à, voire à encadrer, une équipe de développeurs logiciels travaillant à la conception et à la réalisation d'applications de grande ampleur dans le domaine d'application correspondant au parcours-type choisi.
Bachelor's degree, Computer Science
University of Bordeaux
2015
Licence, Informatique

Matthias D.

Java Backend Developer | Java Angular Fullstack

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