> Markdown version of [/jobs/ext/2997952-senior-backend-engineer-kotlin-java-cloud-microservices](https://www.wearedevelopers.com/jobs/ext/2997952-senior-backend-engineer-kotlin-java-cloud-microservices). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Backend Engineer - Kotlin/Java, Cloud Microservices - **Company:** Vonage - **Location:** Zaragoza, Spain - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Amazon Web Services, Cloud Computing, Strategies of Testing, Web Services, Multithreading, Caching, Backend, Kotlin, Kubernetes, Docker, Microservices - **Published:** September 19, 2026 - **Apply:** https://www.buscojobs.com.es/senior-backend-engineer-kotlin-java-cloud-microservices-en-zaragoza-ID-370435082 ## About the Role You will write scalable Kotlin/Java backend code, design microservices, and contribute to testing strategies in a Docker/Kubernetes/AWS environment.Ideal candidates are proficient in multi-threaded architectures, web services, caching, and collaboration across cross-functional teams to deliver reliable, scalable solutions for global customers. #J-*****-Ljbffr ## Description Vonage is seeking software engineers to join our Engineering team and help build high-performance, real-time communications services.You will write scalable Kotlin/Java backend code, design microservices, and contribute to testing strategies in a Docker/Kubernetes/AWS environment.Ideal candidates are proficient in multi-threaded architectures, web services, caching, and collaboration across cross-functional teams to deliver reliable, scalable solutions for global customers.#J-*****-Ljbffr