Senior Java Backend Engineer — Real-Time Systems

Indra Group busca un Senior Java Developer para un proyecto de middleware orientado a la integración en tiempo real con dispositivos hardware y una interfaz de usuario. La posición estará ubicada en Barcelona y se centrará en el desarrollo backend con Java, arquitectura de integración e interoperabilidad. Se trabajará con APIs REST, WebSocket y MQTT,...

King is seeking a Java backend developer to join the Catalog Games team in Barcelona. You will build and improve the technology behind our games, delivering robust backend features, services, tools, and systems. You will work across the lifecycle of backend systems, collaborating with cross-disciplinary teams to design, test, deploy, monitor, and...

Supersonik seeks Senior Engineers to join our core team in Barcelona. You will tackle complex technical problems, shape product architecture from day one, and thrive in a fast-growing startup. You should be fluent in modern Python, async programming, and adept at building scalable, event-driven systems. You’ll work across frontend to infrastructure to...

Fliff is building data-driven sports gaming platforms with real-time data pipelines and a focus on correctness, observability, and resilience. We seek a Senior Python Engineer to own core backend systems. You will work on sports data ingestion, transformation, and distribution, collaborating across squads to ensure timely, accurate data feeds and reliable...

Lingo is building a cutting‑edge digital health platform that fuses continuous biosensor data, high‑performance backend engineering, and advanced analytics to help people live healthier, longer, fuller lives. Our systems process massive volumes of real‑time data, and the backend is the heartbeat that transforms biosensor signals into actionable health...

Diabolocom, a European cloud-based contact centre and CX platform, is seeking a Senior Backend Software Engineer for the Auxiliary Squad in Barcelona. You will design and implement high‑performance backend services using Java/Kotlin, Spring Boot, and modern tooling, contributing to scalable distributed systems and no‑code workflow scenarios. You will...

King is seeking a Java backend developer to join the Catalog Games team in Barcelona. You will build and improve the technology behind our games, delivering robust backend features, services, tools, and systems. You will work across the lifecycle of backend systems, collaborating with cross-disciplinary teams to design, test, deploy, monitor, and...

Smadex is seeking a Software Engineer to join its core engineering team in Barcelona. You will tackle features for the real-time bidding Open-RTB system, contribute to code reviews, and help evolve the platform.The role emphasizes ownership, collaboration, and growth in a fast-paced, international environment, with hybrid work, competitive compensation, and...

DXC Technology es una empresa global que busca un profesional senior para administrar infraestructuras y desarrollar backends Java en un entorno de producción corporativo. Colaborarás estrechamente con desarrollo, infraestructura y operaciones para garantizar continuidad, seguridad y calidad de los servicios. Se trabajará con prácticas de DevOps,...