Jean-Pierre Ragouguelaba Agoda Koussema
I'm a backend and platform engineer with a track record of designing and delivering scalable systems across Japan, the USA, and Togo.
About
I’m a backend and platform engineer with a track record of designing and delivering scalable systems across Japan, the USA, and Togo. I specialize in Java/Spring-based backends, microservices, and secure API design, with experience in JWT authentication, RBAC, and complex domain modeling. I value clean architecture, testability, and reliable deployment via Docker and CI/CD.
I enjoy collaborating across teams to translate challenging requirements into robust technical solutions. My work spans education tech, research software, and large-scale data processing, and I’m comfortable operating in agile environments and driving continuous improvement through monitoring, tracing, and automation.
- 13 years' experience
- Joined October 2025
Skills· 24
Languages
- FrenchFluent
- EnglishFluent
- JapaneseAdvanced
Industry experience
- Software & Internet
- Education
- Media & Entertainment
- Government
- Non-Profit Organization
- Professional Services
- Other
Work experience· 52 roles
Responsible for backend system design and development using Spring Boot; definition and implementation of REST APIs; application of layered and hexagonal architecture for maintainability; JWT-based authentication with Spring Security; management of RBAC and custom security filters; design and maintenance of complex business logic and domain models; transactional processing with @Transactional; PostgreSQL databases with Flyway schema control; testing, code quality enforcement, and optimization; Docker-based deployment and CI/CD-ready environments.
In-house programmer responsible for Angular-based development with MongoDB for an educational media system used in kindergartens, daycare, and welfare settings. Implemented features, integrated data flows, and ensured scalable delivery; the platform is used by over 50,000 children in Japan.
Developed frontend applications using Flutter and backend systems using Spring Boot; designed and implemented a microservices-based backend; REST APIs with Spring Boot and integration via Spring Cloud Gateway; service discovery with Eureka; JWT authentication; RabbitMQ and Kafka for asynchronous processing; system monitoring and tracing with Prometheus, Grafana, and OpenTelemetry; automated build/deploy with Jenkins and Docker.
Education· 22
Certifications and awards· 25
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