Technical Lead - Backend Java Engineer (Madrid)

Julius Baer; Madrid; On-site; EUR 90,000 - 120,000; Full time

Job summary

Julius Baer in Madrid is seeking an experienced Technical Lead - Backend Java Engineer to provide technical leadership while remaining hands-on on a large-scale Java/Jakarta EE platform running on JBoss EAP 8. You will lead backend services, integrations, platform reliability, and release management.

You will mentor engineers, drive technical excellence, and coordinate with Product Owners, Architects, QA, Frontend, and Operations to deliver high-quality software solutions.

Qualifications

• Expert-level Java development with Java 21, Jakarta EE, JPA/Hibernate, and Maven multi-module applications.
• Strong understanding of software architecture, design patterns, and enterprise application design principles.
• Experience building and consuming REST and SOAP services using JAX-RS and JAX-WS.
• Strong experience with Oracle databases, SQL optimization, schema design, and data persistence.
• Experience with messaging and integration technologies, including JMS and enterprise messaging platforms.
• Strong knowledge of testing practices using JUnit, Mockito, and integration testing frameworks.
• Experience with release management, deployment processes, and production support activities.
• Ability to lead technical discussions, make architectural decisions, and communicate effectively with technical and non-technical stakeholders.
• Strong mentoring, coaching, and code review skills.
• Ability to balance hands-on engineering with technical leadership responsibilities.

Responsibilities

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

Skills

Java 21

Jakarta EE

JPA/Hibernate

Maven multi-module

REST APIs

SOAP integration

Oracle databases

JMS messaging

Unit testing

Release management

Mentoring engineers

Code review

Technical leadership

SQL performance tuning

OpenAPI Generator

Tools

OpenAPI Generator

Job description

Julius Baer in Madrid is seeking an experienced Technical Lead - Backend Java Engineer to provide technical leadership while remaining hands-on on a large-scale Java/Jakarta EE platform running on JBoss EAP 8. You will lead backend services, integrations, platform reliability, and release management.

You will mentor engineers, drive technical excellence, and coordinate with Product Owners, Architects, QA, Frontend, and Operations to deliver high-quality software solutions.