Freelancer profile translated to English.

Description

I intervene as a Backend/Cloud expert on high-stakes technical issues: definition of architectures, setup of technical foundations, performance, security, and system reliability.

With over 10 years of experience in backend systems with Java/Spring, microservices, cloud, and DevOps, I have contributed to the design and evolution of critical platforms in the banking and payment sector (Orange Bank, Société Générale, La Banque Postale), particularly on systems with high volumes and availability constraints.

I support teams in designing robust platforms and improving existing systems, with a focus on quality, performance, and resilience in production, especially on:

defining architectures and setting up technical foundations (microservices, APIs, integration, infrastructure)
optimizing performance and processing times (latency, concurrency, shared resources)
securing services and flows (authentication, signature, API exposure)
setting up and improving CI/CD pipelines
cloud deployment or migration and containerization (Docker, Kubernetes)
setting up monitoring, alerting, and observability
architecture review, refactoring, and technical debt reduction
supporting team upskilling

My approach remains pragmatic: rapid understanding of the context, identification of friction points, and implementation of concrete and sustainable solutions.

Industry field of expertise

Languages

English
Fluent
French
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 50km)

Transactis – Société Générale / La Banque Postale
Senior Backend | Java - Spring - Ops Referent
BANKING AND INSURANCE
January 2025 - Today (1 year and 7 months)
Marne La Vallée, France
• Design and implementation of the Wero payment services architecture
• Development of Spring Boot microservices
• Security of mTLS and flow signatures with HMAC/RSA
• OAuth2 on administration services with Spring Security
• Synchronization and recovery batch for blocked operations
• Setup of Jenkins CI/CD
• Resilience and Kubernetes deployment
• Grafana monitoring and alerting
• Code review and refactoring, technical arbitration
• Production management: Supervision, Run maintenance, Performance improvement, Bug analysis and correction

Stack: Java 17, Spring Boot 3, Kafka, Docker, Kubernetes, Helm, Harbor, PostgreSQL/PgPool, REST, Micro-services
Spring boot Java Kubernetes Helm Jenkins
Orange Bank
Tech Lead Backend Java - Spring – Freelance
BANKING AND INSURANCE
November 2018 - December 2024 (6 years and 1 month)
Montreuil, France
• Development and exposure of functionalities via web service (REST): Card payment management, Transfer order management, Real-time accounting management (FPM), Customer account management and CRM synchronization, KYC management and tracking
• Setup and management of synchronization batches
• DSP2 operations management
• Multi-platform SMS and Push notification alerting system via Firebase
• Modernization of monolithic service into microservices
• Migration of microservices to AWS
• Mastercard integration (MPE) for card payments
• Screening of operations against fraud and anti-money laundering
• Scoping of projects with architects
• Application run maintenance: Bug analysis and correction

Stack: Java 8, Spring boot, Git, kafka, aws, airflow, maven, liquibase, swagger, micro-service, REST, SOAP, Firebase, junit, assertJ, mockito, wireMock, cxf, Airflow
Spring boot Apache Kafka Amazon Web Services Kubernetes Java
Renault Digital
Backend Java Developer
AUTOMOBILE
August 2017 - October 2018 (1 year and 2 months)
Boulogne-Billancourt, France
Development of an e-commerce platform in microservices
• Development of REST APIs
• Setup of a purchasing funnel engine with a configurable sales cycle per store and per product
• Cart management
• RSQL search engine on Elasticsearch and Postgres
• Automatic deployment on AWS ECS cloud
• Automated testing - Cucumber
REST APIs microservices-architecture Spring boot spring batch Spring Data JPA