Freelancer profile translated to English.
Back to original languageAbout Tontosa
Passionate about designing robust software architectures, I help companies develop their critical applications. Whether for demanding financial platforms, regulated health applications, or real-time engines, I ensure the delivery of clean, performant, and scalable code.
🛠 My preferred technical stack:
Backend: Java 21, Spring Boot 3, Node.js, Python.
Frontend: Vue.js, React.js.
Architecture & Data: Microservices, Apache Kafka, PostgreSQL, WebSockets.
💡 My approach:
Accustomed to demanding environments (financial security, health data), I am involved throughout the development cycle: from the design of distributed architecture to production delivery. Autonomous and proactive, I am 100% operational in remote work.
Let's discuss your next project!
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Cegedim Business ServicesFullstack Developer - Node.js / Vue.js BackendMEDICALJuly 2025 - Today (11 months)
- Developer within a product team in an Agile environment, working on a production business application in the health sector (regulated domain). Contribution to the entire development cycle: architecture, code, review, delivery.
- Led a complete architectural refactoring (separation of concerns, SOLID principles), proposed autonomously and adopted by the team: significantly more maintainable codebase, reduced technical debt.
- Developed end-to-end fullstack features: Node.js REST API + Vue.js 3 interfaces, on complex and ambiguous business specifications.
- Bridged the gap between business and technical aspects in collaboration with the Product Owner: active participation in sprint planning, reviews, and refinements.
- Plateforme d'investissementBackend Java & DevOps Developer - Microservices ArchitectureJanuary 2026 - May 2026 (4 months)
- Design and development of an investment platform on a distributed architecture of 8 Java 17 / Spring Boot 3 microservices, focused on performance, resilience, and financial security.
- Architected the inter-service communication system with Apache Kafka: total decoupling, load peak absorption without message loss, asynchronous processing of financial events.
- Handled critical billing and notification services: transactional consistency via JPA/Hibernate and PostgreSQL, real-time alerts, email sending.
- Secured all access with Spring Security and JWT; complete coverage by JUnit 5 tests to ensure non-regression.
- Containerized with Docker and orchestrated deployments via Kubernetes for a reproducible and scalable production environment.
- Blokus OnlineFullstack Java Developer - Real-time Backend & WebSocketSeptember 2024 - June 2025 (9 months)
- Backend development of a multiplayer online game "Blokus" with complex business rules and real-time synchronization between players, from design to launch.
- Designed a Java game engine applying strict placement rules on the server side: move validation, end-of-game detection, score calculation, business logic entirely encapsulated on the backend.
- Exposed the engine via Spring Boot REST API secured by Spring Security and JWT: player authentication, game session management.
- Ensured real-time synchronization of the board state between all connected players via WebSocket: guaranteed game consistency, minimized latency.
- Full stack: Java / Spring Boot / Spring Security / WebSocket / JWT
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Education
- Master MIAGEUniversity of Orléans2026Master MIAGE
- Computer Science Degree MIAGEUniversity of Orléans2024Licence Informatique MIAGE