Java Backend Engineer - Enterprise Platform Innovator

Julius Baer; Madrid; On-site; EUR 70,000 - 95,000; Full time

Job summary

Julius Baer in Madrid seeks a skilled Java Backend Engineer to develop, enhance, and maintain our enterprise platform built on Java/Jakarta EE. You will work with leads, product owners, QA, and other teams to deliver robust software across backend and frontend domains.

The ideal candidate has strong Java/Jakarta EE experience, hands-on API design, and a passion for solving complex problems in a full-stack capacity. Madrid office-based role with collaboration across tech teams.

Qualifications

• Strong Java experience with OO programming.
• Proficient in Java/Jakarta EE, JPA/Hibernate, and Maven.
• Experience building/consuming RESTful APIs.
• Working knowledge of Oracle SQL and data persistence.
• Understanding of design patterns and clean code.
• Experience with JUnit and Mockito for tests.
• Familiarity with Git and collaborative workflows.
• Problem solving and analytical skills.
• Ability to work in Agile teams and communicate effectively.
• Full-stack capability across backend/frontend domains.

Responsibilities

• Develop and maintain backend applications using Java 21, Jakarta EE, JPA/Hibernate, and Maven.
• Design and implement REST APIs and integrate with internal/external systems.
• Contribute to enterprise integrations using SOAP, JMS, and messaging technologies.
• Collaborate with Product Owners, Analysts, and Architects to deliver technical solutions.
• Develop database-related functionality with Oracle, including data modeling and query optimization.
• Write clean, maintainable, testable code following engineering standards.
• Create and maintain automated unit/integration tests.
• Troubleshoot defects, performance issues, and production incidents.
• Contribute to monitoring, observability, and continuous improvement initiatives.
• Support deployment, testing, and release activities.

Skills

Java development

Jakarta EE

JPA/Hibernate

Maven

RESTful APIs

Oracle SQL

Software design principles

Automated testing

Agile development

Collaboration

Full-stack awareness

Tools

None

Job description

Julius Baer in Madrid seeks a skilled Java Backend Engineer to develop, enhance, and maintain our enterprise platform built on Java/Jakarta EE. You will work with leads, product owners, QA, and other teams to deliver robust software across backend and frontend domains.

The ideal candidate has strong Java/Jakarta EE experience, hands-on API design, and a passion for solving complex problems in a full-stack capacity. Madrid office-based role with collaboration across tech teams.