Freelancer profile translated to English.

Description

Senior Java Engineer with over 9 years of experience in the banking sector, specializing in the design, evolution, and refactoring of critical backend applications for profitability and risk management, within high-volume systems. I cover the entire project cycle: functional analysis, development, data integration, performance optimization, and production environment management (CI/CD, industrialization). Recognized for my dual technical and functional expertise, I work on both complex legacy environments and modern architectures (REST APIs, microservices), with a strong focus on code optimization, data quality, and maintainability.

Languages

English
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 50km), Lille (up to 50km), Lyon (up to 20km), Nantes (up to 20km)

Société Générale
Tech Lead Java – Application Referent (SIREO)
December 2022 - Today (3 years and 6 months)
Val de Fontenay, 94120 Fontenay-sous-Bois, France
• Technical and functional referent role: point of contact between product and development teams, clarifying needs, designing solutions, and making technical trade-offs.
• Analysis and takeover of a complex legacy system to extract business rules and technical dependencies for re-implementation in a modern API.
• Design and development from scratch of a backend API in Java 17 / Spring Boot, based on a hexagonal architecture and designed for cloud operation.
• Responsible for the quality, consistency, and reliability of data feeding the calculation engine (RWA, equity, pre/post-operation RGCP, EL, LGD, PNB, TCI…), with implementation of consistency checks and result validation.
• Implementation of rating and decision rules: calculation of indicators, green/orange/red scoring, and triggering validation levels (CAR Director, etc.).
• Application performance optimization, particularly through the implementation of caching mechanisms (Caffeine) and data access optimization.
• Contribution to the CI/CD pipeline (Jenkins, Docker, Git, SonarQube).
• Implementation of unit tests (JUnit 5, Mockito) and continuous improvement of code quality.
Technologies: Java 17, Spring Boot, REST APIs (JAX-RS), JPA/Hibernate, Hexagonal architecture, Docker, Jenkins, Git, SonarQube, Caffeine, JUnit 5, Mockito, Tomcat.
Spring boot API Teradata Apache Tomcat Java
BNP Paribas CIB
Java / PL-SQL Development Engineer
July 2021 - December 2022 (1 year and 5 months)
Paris, France
• Development and evolution of the internal Java ETL (Spring Boot) intended to gradually replace DataStage.
• Contribution to Data Collection activities: responsibility for the Java utility for integrating data flows (daily, monthly, annual), integration and validation of data feeding the Oracle Data Warehouse.
• Development and optimization of PL/SQL scripts (execution plans, performance).
• Monitoring and maintenance of Shell scripts (KSH) for orchestration and batch processing.
• Participation in application releases: preparation of deliverables, Git commits and pushes, in coordination with DevOps teams.
• Level 3 (L3) support for critical production incidents.
• Transfer of skills and support for offshore teams (India).
Technologies: Java 8, Spring Boot, PL/SQL, Sybase, Oracle, Shell (KSH), Git, JUnit 4.
Spring boot SQL KSH Java WinSCP
Société Générale
Java EE Development Engineer
July 2019 - July 2021 (2 years)
Val de Fontenay, 94120 Fontenay-sous-Bois, France
Development and maintenance of ETRETAT: application dedicated to customer profitability and rating, relying on a high-volume database, with high performance and availability challenges.
• Contribution to the development of business rules and backend workflows related to simulation and decision processes.
• Implementation of high-impact business calculations, with particular attention to data consistency and reliability.
• Integration of external calculators via REST/JSON APIs, including exchange and validation management.
• Technical modernization of the application: Java 6 → Java 8, WebLogic → Tomcat 9, SVN → Git.
• Project Mavenization: centralization and dependency management, improvement of build reproducibility.
• Application responsibility for environments: server configuration, SSL certificate management.
• Participation in application deployments and production launches.
• Application support and incident diagnostics, performance analysis, and bug fixing.
Technologies.
Java EE API Apache Tomcat JSF EJB