Backend Developer - Java & Spring

As a Java Backend Engineer at LUMASERV, you'll play a key role in developing and maintaining customer projects that serve millions of users daily. You'll work closely with our product managers, developers, and architects to build robust, scalable backend solutions using modern Java frameworks, particularly Spring Boot. If you appreciate clean code, domain-driven design, and the elegance that Spring Boot brings to application development, this position offers you the opportunity to shape the technical direction of projects while writing high-quality code every day.
You implement backend solutions using modern web frameworks, primarily Spring Boot
You design and develop RESTful APIs that integrate seamlessly with frontend applications and external systems
You write and maintain comprehensive automated software tests to ensure code quality and reliability
You collaborate with frontend developers to design efficient API contracts and data structures
You work with databases (MySQL, MariaDB, Redis) to design efficient data models and queries
Extensive professional experience in Java backend development
Strong expertise with Spring Boot (or similar modern frameworks like Quarkus, Micronaut)
Experience with agile methodologies (Kanban, SCRUM)
Strong understanding of web security principles and common vulnerabilities
Experience with domain-driven design and software architecture
Knowledge of CI/CD processes and DevOps practices
Contributions to open-source projects or active participation in the developer community
At LUMASERV, we work on high-impact cloud and infrastructure projects – from high-availability platforms for public administrations to scalable solutions for education and research. We develop and operate systems that millions of users rely on every day – secure, compliant with data protection regulations, and meeting European standards.