Technical Lead – Backend Java Engineer 100% (f/m/d)

Julius Baer; Madrid; On-site; EUR 90,000 - 130,000; Full time

Job summary

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

The ideal candidate combines strong backend expertise with excellent communication, a pragmatic mindset, and a passion for mentoring engineers while driving technical excellence.

Qualifications

• Expert-level Java development with hands-on experience in Java 21 and Jakarta EE.
• Strong understanding of software architecture and enterprise design principles.
• Experience building/consuming REST and SOAP services (JAX-RS/ JAX-WS).
• Proficiency with Oracle databases, SQL optimization and data persistence.
• Experience with JMS and enterprise messaging platforms.
• Strong testing practices using JUnit and Mockito.
• Experience with release management, deployments, and production support.
• Ability to lead technical discussions and communicate with technical/non-technical stakeholders.
• Strong mentoring, coaching, and code-review skills.
• Ability to balance hands-on engineering with leadership responsibilities.

Responsibilities

• Lead design, development, and maintenance of Java/Jakarta EE backend apps on JBoss EAP 8.
• Design scalable, reliable software aligned with requirements.
• Drive decisions around APIs, integrations, messaging, and architecture.
• Collaborate with Product Owners, Architects, and stakeholders to translate requirements.
• Own and coordinate application releases, deployments, and production rollout activities.
• Mentor engineers through guidance, reviews, and knowledge sharing.
• Promote best practices, coding standards, and architectural governance.
• Lead integrations using REST, SOAP, JMS, and messaging systems.
• Work with Oracle databases for data modeling and performance tuning.
• Support frontend teams on backend integration when needed.
• Coordinate with QA, DevOps, and Operations for smooth delivery.

Skills

Java 21

Jakarta EE

JPA/Hibernate

REST & SOAP

Oracle DB & SQL

JMS & messaging

Maven multi-module

Unit/integration testing (JUnit, Mock)

Release management

Technical leadership

Code reviews & mentoring

Communication with stakeholders

Tools

JAX-RS

JAX-WS

JBoss EAP

OpenAPI / API governance

Flyway (DB migrations)

Docker (local dev)

Job description

At Julius Baer, we celebrate and value the individual qualities you bring, enabling you to be impactful, to be entrepreneurial, to be empowered, and to create value beyond wealth. Let’s shape the future of wealth management together.

We are seeking an experienced Technical Lead – Backend Java Engineer to join our team in Madrid. In this role, you will provide technical leadership while remaining hands‑on in the development of a large‑scale Java/Jakarta EE platform running on JBoss EAP, with a primary focus on backend services, integrations, platform reliability, and release management.

You will lead the technical direction of the backend domain, collaborate closely with Product Owners, Architects, QA, Frontend, and Operations teams, and ensure the successful delivery of high‑quality software solutions. The ideal candidate combines strong backend expertise with excellent communication skills, a pragmatic mindset, and a passion for mentoring engineers while driving technical excellence.

YOUR CHALLENGE

• 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.

YOUR PROFILE

Must-Have Skills

• Expert-level Java development with strong hands-on experience in Java 21, Jakarta EE, JPA/Hibernate, and Maven multi-module applications.
• Solid understanding of software architecture, design patterns, and enterprise application design principles.
• Experience building and consuming REST and SOAP services using technologies such as 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.

Nice-to-Have Skills

• Experience with Angular, TypeScript, or modern frontend frameworks to support integration efforts when needed.
• Knowledge of OpenAPI Generator, API governance, and contract-first development approaches.
• Experience with Flyway and database migration strategies.
• Familiarity with Splunk, OpenTelemetry, and observability best practices.
• Experience working with Docker-based local development environments.
• Exposure to Kotlin and automated integration testing frameworks.
• Experience driving technical improvements, platform modernization, and engineering process enhancements.
• Experience working in Agile environments with distributed and cross-functional teams.