Custom Java & Spring Boot Development

Modern Java back-end development is our core business. We build robust REST APIs, scalable microservices and event-driven architectures around Spring Boot, Spring Cloud and the wider JVM ecosystem. Whether you are launching a new product or evolving an existing platform, our senior consultants cover the entire chain: domain modelling, API design, persistence (JPA/Hibernate, PostgreSQL, MongoDB), security (Spring Security, OAuth2/JWT) and automated testing.

We are fluent in distributed architectures: splitting systems into microservices, asynchronous communication via Apache Kafka or RabbitMQ, resilience (circuit breakers, retries) and observability (structured logs, metrics, distributed tracing). Our deliverables are production-ready: containerised with Docker, deployed on Kubernetes, integrated into your CI/CD pipelines and shipped with clear documentation.

Quality is central to how we work. We apply Clean Code principles, thorough testing (JUnit, Testcontainers, integration tests), code review and continuous integration to reduce technical debt and guarantee long-term maintainability. We also handle version upgrades (migrating to the latest Java and Spring Boot LTS releases) and performance tuning of existing applications.

We work both as an extension of your team (Time & Material) and on a fixed-price, outcome-based scope, remotely from France or on site as needed. You get a senior technical counterpart, transparent communication and code that remains fully yours.