Our client, a major industrial player in the defense and mission-critical systems sector, is looking for a Java Software Architect to strengthen its software teams and contribute to high-value, secure solutions. Mission As a Java Software Architect, you will design and develop secure, high-performance, and scalable software solutions for critical environments. You will be involved in architectural decisions, backend and frontend development, and continuous product improvement within an Agile and international context. Key Responsibilities Design and develop Java backend services using Spring Boot Define and evolve microservices architectures Implement and consume RESTful APIs Develop frontend interfaces using Angular Apply security best practices (authentication, authorization, secure coding) Ensure code quality through unit and integration testing Optimize application performance and scalability Collaborate within Agile / Scrum international teams Participate in Agile ceremonies and propose continuous improvements Profile / Requirements : Profile Proven experience as a Java Software Architect or senior Java backend engineer Strong expertise in Java and Spring Boot Experience with Angular Solid understanding of REST APIs and microservices Strong awareness of software security concepts Experience working in Agile / Scrum environments Good professional level of English Eligible for a security clearance Nice to Have Experience in defense or mission-critical industries Knowledge of Kafka, Kubernetes, Keycloak, Prometheus, Grafana