Freelancer profile translated to English.
Back to original languageAbout Gaetan
🏗️ Expert Software Engineer Back-End | Java, Spring, Quarkus & SQL
14+ years of experience transforming complex business problems into robust and performant software architectures.
My approach? Not just 'coding', but supporting companies in securing their application assets and optimizing their data flows.
🚀 What I bring to your project:
Custom Backend & Design: Advanced mastery of the Java ecosystem (Spring Boot, Quarkus) for fast REST APIs and a controlled microservices or monolithic architecture.
Data & Performance Expertise: Optimization of complex queries and PL/SQL procedures. I don't just store data, I make it perform.
Modernization & Refactoring: Code audit, framework version upgrades, and transformation of legacy systems into modern, maintainable solutions.
Dual Competence: In-depth needs analysis and technical scoping (Energy, Insurance, Payment sectors).
🛠 Technical Stack:
Backend: Java 8 to 21, Spring Framework, Quarkus, Hibernate.
Data: Oracle PL/SQL, PostgreSQL (optimization and architecture).
Frontend: Angular, JavaScript (for an agile Full-stack vision).
Methodology: Agile/Scrum, TMA (Third-Party Application Maintenance), CI/CD.
📈 Key References:
TotalEnergies (Sismage): Optimization of the core framework for a geophysics software. Analysis and development of critical evolutions.
GFI (Payment & Insurance): Management of fixed-price projects. Responsible for PL/SQL and Business Intelligence (BI) developments.
Innovation: Development of touch HMI prototypes and maintenance of time management applications.
14 years of experience allow me to anticipate technical debt and deliver clean, tested, and documented code.
💬 A technical challenge or a complex project to scope? Let's discuss, I usually respond in under 2 hours!
French
Native or bilingual
English
Native or bilingual
German
Conversational
Remote only
Primarily works remotely
Experience
- NeoGTech - Total EnergiesStudy and Development EngineerENERGY AND UTILITIESApril 2021 - December 2025 (4 years and 8 months)Valenciennes, France• • Sismage Framework: Design, development of evolutions, and optimization of cutting-edge geophysical interpretation software.• • API Architecture: Evolution of a complex REST API for accessing massive geophysical data.• • Expertise: Needs analysis and software design in a complex environment
- Education Logistics (USA)Full-Stack EngineerTRANSPORTATIONJanuary 2019 - January 2020 (1 year)Missoula, United StatesFull-Stack Java/Spring (Backend) and JavaScript/Angular (Frontend) development. Implementation of new features for the first school bus tracking web application. Setup of the mongo database, user management creation. Fully English working environment (American).
- TECH'advantage - TotalAnalyst DeveloperENERGY AND UTILITIESMay 2017 - January 2019 (1 year and 8 months)Pau, FranceSismage software TMA: corrective and evolutionary development, participation in the Framework team.Java Swing environment
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Education
- Master TNSIUniversity of Valenciennes2012Master TNSI
- Science for Engineers Bachelor's DegreeUniversity of Valenciennes2010Licence Des Sciences pour l'ingénieur