Java Backend Engineer (f/m/d)

October 27, 2026

Office

Middle

Madrid, Spain

Indeed

Keep in mind

Office-only work

Description

A Java Backend Engineer is needed to join a team in Madrid and contribute to the development, enhancement and maintenance of a business-critical enterprise platform built on Java/Jakarta EE. The role covers backend development, REST API design, enterprise integrations with SOAP and JMS, and Oracle database work, with the ability to contribute across the full stack. The engineer works closely with Technical Leads, Product Owners, QA engineers and architects in Agile teams, writing clean, tested code and supporting production troubleshooting, monitoring and release activities.

Gender markers in the title: (f/m/d)

In accordance with European anti-discrimination legislation, this job is open to all candidates

Ffemale

Mmale

Ddiverse

Responsibilities

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

Requirements

Strong hands-on experience with Java development and object-oriented programming principles
Experience with Java/Jakarta EE, JPA/Hibernate and Maven-based applications
Experience building and consuming RESTful APIs
Working knowledge of Oracle databases, SQL and data persistence concepts
Understanding of software design principles, design patterns and clean coding practices
Experience with automated testing using frameworks such as JUnit and Mockito
Familiarity with source control systems and collaborative development workflows
Strong problem-solving skills and ability to analyze complex technical issues
Ability to work effectively within Agile development teams
Good communication skills and a collaborative mindset
Ability to work across both backend and frontend domains in a full-stack capacity