Senior Full-Stack Engineer: Java/Spring & Angular Expert

IOON Barcelona, Spain Posted 21 Sept 2026

About this role

IOON is seeking a Senior Full Stack Developer to drive backend in Java 21/Spring Boot 3.x and frontend in Angular 21 in Barcelona, Spain. English fluency (B2) is required to collaborate across teams. You will implement robust REST services, work with PostgreSQL, MongoDB, and XML-heavy integrations, and help shape architecture with hexagonal/DDD in Maven environments. Emphasis on CI/CD, tests, and modern frontend patterns. J-18808-Ljbffr

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