Senior Backend Engineer — Real-Time Banking APIs

Actimo is seeking a Node.js developer skilled in both backend and full-stack development. Your role involves driving development of the core platform, maintaining high-quality code, and building RESTful APIs. The ideal candidate should have 2+ years of experience with Node.js and a Computer Science degree/equivalent.The position includes benefits like...

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,...

FinTech Collective, LLC is seeking a Senior Software Engineer for the Core Platform team that runs a real-time payment ledger. You will work on how transfers are accepted, recorded and confirmed, with strong emphasis on correctness under high concurrency.You’ll own design, write tests, review code, profile performance, and lead cross-team initiatives such...

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...

Abacum, the leading Business Planning solution, is hiring a Software Engineer to join our Barcelona team. You will work on a multi-disciplinary squad building a real-time calculations engine and data visualisations, collaborating with designers, product, and other engineers. We value ownership, fast learning, and a hands-on approach to shaping our technical...

Dow Jones in Barcelona is seeking a Staff Software Engineer to modernize real-time news systems and content services such as Newswires, Factiva and the Wall Street Journal. You will design and deploy high‑quality, scalable backend solutions using AWS, Kubernetes, Kafka and GenAI.You should have 7+ years of backend experience, Java in Linux, RESTful APIs,...

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...