Technical Lead, Backend Java Engineer | Madrid

Bank Julius Bär & Co. Ltd.; Comunidad de Madrid; On-site; EUR 90,000 - 125,000; Full time

Job summary

Julius Baer in Madrid is seeking an experienced Technical Lead – Backend Java Engineer to own and advance a Java 21/Jakarta EE backend platform running on JBoss EAP 8. You will work hands-on while mentoring engineers and shaping technical direction.

You will collaborate with product owners, architects, QA, frontend, and operations to deliver scalable REST/SOAP services, robust data models in Oracle, and reliable deployments.

Qualifications

• Expert-level Java development in Java 21 and Jakarta EE.
• Hands-on with JPA/Hibernate and Maven multi-module apps.
• Experience building REST and SOAP services (JAX-RS/JAX-WS).
• Experience with Oracle databases and SQL optimization.
• Experience with messaging (JMS) and enterprise messaging platforms.
• Testing with JUnit, Mockito, and integration tests.
• Release management and production support.

Responsibilities

• Lead the design, development, and maintenance of Java 21/Jakarta EE backend applications on JBoss EAP 8.
• Design scalable, maintainable, and reliable software aligned with requirements.
• Drive architectural decisions for REST, SOAP, messaging, and persistence.
• Collaborate with Product Owners, Architects, and stakeholders to translate requirements.
• Own and coordinate releases, deployments, environment readiness, and production rollout.
• Mentor and coach engineers through code reviews and knowledge sharing.
• Promote engineering best practices, governance, and continuous improvement.
• Lead integrations using REST, SOAP, JMS, and messaging systems.
• Work with Oracle databases, data modeling, performance tuning, and schema evolution.
• Support frontend teams when backend integration is required.
• Collaborate with QA, DevOps, and Operations for smooth delivery and readiness.

Skills

Java 21

Jakarta EE

JPA/Hibernate

Maven multi-module

REST APIs

SOAP integrations

Platform reliability

Release management

Mentoring engineers

Communication with stakeholders

Tools

JBoss EAP

Oracle Database

JAX-RS

JAX-WS

Docker

OpenTelemetry

Job description

Julius Baer in Madrid is seeking an experienced Technical Lead – Backend Java Engineer to own and advance a Java 21/Jakarta EE backend platform running on JBoss EAP 8. You will work hands-on while mentoring engineers and shaping technical direction.

You will collaborate with product owners, architects, QA, frontend, and operations to deliver scalable REST/SOAP services, robust data models in Oracle, and reliable deployments.