Freelancer profile translated to English.
Back to original languageAbout Maxence
Looking for aJava backend developercapable of structuring, securing evolutions, and delivering without stress?
I design and evolve backends inJava 21/Spring Boot**, from monoliths to **microservicesarchitectures, including **REST APIs**.
Here's what I've concretely delivered:
Softway Medical— European leader in health IT, top 10 globally: complete rewrite of the therapeutic booklet import for Hôpital Manager. **Import time reduced from 2 hours to 30 minutes**, logic split into single responsibility services, test coverage increased from zero to complete via TDD.
Keepcool— 270 locations, 450,000 members, €110M revenue: took over an offshore backend with no tests or best practices. **Coverage increased from zero to 65%, SQL queries optimized by -20%**. Code that could no longer be touched without risk, made deliverable with confidence.
Oppscience— 300,000+ users:migration to a microservices architecturewith Kafka and implementation of the SAGA pattern, which resolved a chronic data inconsistency issue between services.
Your project relies onJava/Spring Boot,or **migrating from legacy to a modern stack**? I step in to ensure each sprint results in a stable delivery, not an accumulation of debt.
Have a project? Contact me.
--
Software engineer, java spring, java j2ee, java jee, java spring boot, java aws, java ee, java fullstack, Java back-end, java backend, java micro-services, springboot, spring java, spring batch, spring cloud, spring mvc, spring security, java spring backend, java developer, spring developer, backend developer, Java tech lead, Java software architect, software architect.
French
Native or bilingual
English
Fluent
Can work on-site
Marseille (up to 50km), Paris (up to 50km), Lyon (up to 50km), Montpellier (up to 50km), Nice (up to 50km)
Experience
- EtoilysJava DeveloperREAL ESTATEAugust 2025 - June 2026 (10 months)13790 Rousset, FranceÉtoilys specializes in the classification of tourist accommodations. Accredited by COFRAC for tourist accommodation classification, it operates within the official classification procedure. It stands out for its highly digitalized approach, relying on software to implement and manage the entire process.The team consisted of two people:- 1 Front-end developer and Product Owner- 1 Backend developerAs the architect and Java developer for Étoilys' backend, I was responsible for:- Design, development, and maintenance of the platform's backend- Technical translation of business needs and their implementation- Definition of the technical architecture and key product choices- Application maintenance, platform availability, and associated tools- Securing private and public APIs, particularly the classification simulator- Design of the data model and backend flows- Implementation of best practices for development, testing, and software quality- Setup of continuous deployment environments and industrialization- Technical documentation and continuous improvement of the applicationÉtoilys helps streamline and significantly reduce all stages of the classification process, notably through the digitalization of the inspection questionnaire, which covers 133 criteria to validate as well as the entry of accommodation composition. This digitalization reduces the time inspectors spend on administrative tasks by a factor of three.Technical context: Java 21, Spring Boot, Spring Framework, Spring Data, Spring Security, Postgres SQL, Flyway, Google API, AWS S3, OAuth2, Rest, Github actions, IntelliJ IDEA
- SOFTWAY MEDICALJava DeveloperMEDICALFebruary 2024 - July 2025 (1 year and 5 months)13710 Fuveau, FranceSoftway Medical is a major player in e-health, a European leader in health IT, and ranked among the top 10 global health software publishers in 2024. The group has approximately 1000 employees and serves over 1,300 healthcare facilities. The Softway Medical entity in Fuveau generated €29.62 million in revenue.I joined the ITO squad dedicated to the interoperability of flows between Hospital Manager and third-party health sector applications.We were organized into a squad of 22 people. My squad consisted of:- 4 Product Owners- 2 Tech Leads- 14 Developers- 2 TestersAs a Java/Scala developer, I was responsible for:- Complete rewrite of the therapeutic booklet import, switching from a global import to a unit import- Contribution to design choices and evolution of the backend architecture- Analysis of business needs and their translation into robust technical solutions- Consolidation of Doctolib, MSSanté, and DMP interoperability flows- Implementation of the Ségur V2 standard for secure medical document transmission- Setup of an automatic testing framework to secure deployments and reduce regressionsI contributed to:- Rewriting the therapeutic booklet import: import time reduced from 2 hours to 30 minutes, logic split into single responsibility services, test coverage increased from zero to complete via TDD- Consolidation and security of interoperability flows with key players in the health ecosystem- Compliance and reliability of document exchange through Ségur V2 implementation- Improvement of delivery quality through an automated testing framework reducing regression riskTechnical context: Java 8/21, Scala, Spring Framework, Spring Security, Spring Data JPA, Cats Effect, REST, Oracle, GitLab, Docker, OpenShift, HL7, CDA, IHE XDM
- KEEP COOLJava DeveloperSPORTSJanuary 2023 - December 2023 (11 months)Éguilles, FranceKeepcool is a major French fitness chain, with approximately 270 locations, 450,000 members, and €110M in consolidated revenue. The brand employs around 350 direct employees, with headquarters in Éguilles.I joined the Keep Cool application development team as the head of the application's backend.We were a small team of 3 people:- 2 Mobile Developers- 1 Backend DeveloperAs the head of the application's backend, I was responsible for:- Architectural refactoring of the backend towards a more sustainable, industrialized, and maintainable architecture- Development of new backend features- Implementation of a testing strategy and improvement of coverage to secure evolutions- Setup of a database migration systemI contributed to:- Improvement of software quality through a 65% increase in test coverage- Securing application evolutions by implementing an adapted testing strategy- Improvement of backend performance with a 20% reduction in execution time for the most costly SQL queries- Structuring database management through the implementation of a migration systemTechnical context: Java 11, Spring Boot, Spring Framework, Spring Data, MyBatis, JUnit, Mockito, Flyway, REST, MySQL 8, GitLab, SonarQube, Docker, Gradle
Recommendations
+4
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Engineering DegreePolytech Grenoble2011Diplôme d'ingénieur
Certifications
- Computer Engineering DegreePolytech Grenoble2011