Senior Java Engineer | Spring Boot, Microservices, Spring AI, GWT | 13+ years

Designed, built, and launched a multilingual AI booking assistant SaaS for appointment-based businesses (clinics, salons, hotels). Built a multi-tenant SaaS architecture in Java / Spring Boot, PostgreSQL (Flyway) and Redis with strict data isolation, secured with OAuth2 / OIDC (Keycloak) and JWT. Integrated LLMs with Spring AI for tool calling and AI agent orchestration. Ran a multi-model setup with Claude Haiku via AWS Bedrock, MiniMax, and self-hosted open models. Added AI guardrails with per-tenant spending caps and Java validation. Shipped an embeddable chat widget, live human takeover, Stripe billing, and a dashboard in 6 languages. Covered the platform with 800+ automated tests (JUnit 5, Mockito, Testcontainers), deployed on AWS.

Worked on warehouse automation and logistics software used by global retail and cold-chain operators. Tailored the Dematic logistics platform for major clients including Decathlon, Americold, and Cargo. Developed across the platform's evolution from Java 8 through 11, 17, and 21. Built new features and resolved production defects across a JEE stack (CDI, EJB3, GWT, ActiveMQ) on WildFly / JBoss. Worked directly with client stakeholders and QA through testing and validation.

National smart-meter (Linky) deployment for France's electricity distribution operator. Designed decommissioning and migration scenarios for the smart-meter platform and evaluated technical migration paths. Diagnosed and fixed MyBatis memory leaks in production using AppDynamics and VisualVM. Wrote architecture documentation and supported teams through delivery on Spring Batch, Spring Cloud Data Flow, and Kafka.