> Markdown version of [/jobs/ext/4215728-senior-backend-engineer-api-driven-reactive](https://www.wearedevelopers.com/jobs/ext/4215728-senior-backend-engineer-api-driven-reactive). 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 - API-Driven & Reactive - **Company:** HCL Technologies Limited - **Location:** Spain - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Microsoft Azure, Databases, Continuous Integration, Java Database Connectivity, Java Persistence API, Apache Maven, OpenShift, Backend, Api Design, Domain Driven Design, Dynatrace - **Published:** October 13, 2026 - **Apply:** https://www.jobleads.com/es/job/senior-backend-engineer-api-driven-reactive--spain--edffae1b0dcd2576652d956467fc1fe2e ## About the Role Proficiency in Maven, JPA/JDBC, and databases is expected, with knowledge of OpenShift and scalable architectures. You should be comfortable with distributed tracing, hexagonal architecture, and domain-driven design (DDD). ## Description HCL Technologies Limited is seeking a Backend Developer to strengthen our Spain-based team. You will design and implement backend services, compose APIs, and contribute to CI/CD using Azure DevOps. Proficiency in Maven, JPA/JDBC, and databases is expected, with knowledge of OpenShift and scalable architectures. You should be comfortable with distributed tracing, hexagonal architecture, and domain-driven design (DDD).