# Software Engineer Java Specialist

> COSMOTE GLOBAL SOLUTIONS NV · Luxembourg, Luxembourg (Hybrid) · Contract · Posted 2026-04-22

**Workplace:** hybrid

## Description

**COSMOTE Global Solutions NV** is looking for a skilled **Software Engineer Java Specialist** to join our dynamic ICT team. As a leading ICT Systems Integrator and a part of the OTE Group, we provide comprehensive ICT solutions and services to help our clients drive digital transformation.

**Key Responsibilities:**

-   Design, develop, and maintain Java-based software applications and components.
-   Collaborate with cross-functional teams to analyze requirements and translate them into scalable software solutions.
-   Implement best practices in software design, coding standards, and testing methodologies.
-   Contribute to the entire software development lifecycle, including architecture, development, testing, deployment, and maintenance.
-   Troubleshoot and resolve software-related issues and provide timely solutions.
-   Maintain up-to-date technical documentation and support knowledge sharing across the development team.
-   Stay current with emerging technologies and industry trends to recommend process and technology improvements.

## Requirements

-   Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field.
-   11+ years of professional experience as a software engineer working with Java, Jakarta EE / Java EE, and modern Spring Boot applications (Java 17; preferably Java 21 or higher), ideally contributing to migration or modernization scenarios.
-   Solid understanding of modern application architecture, including microservices, clean APIs, modular backend design, and frontend backend integration (React + Spring Boot).
-   Experience with relational databases, including legacy systems such as Sybase and modern targets such as Oracle, or MS SQL Server.
-   Strong knowledge of REST, SOAP web services, JMS, Unix shell scripting, Apache Kafka, and JSON based integration patterns.
-   Working knowledge of DevOps and CI/CD practices, particularly in modernization contexts (pipeline automation, quality gates, artefact promotion, deployment patterns).
-   Hands on experience with enterprise development and integration tooling:

-   Jenkins (build & deploy pipelines),
-   Maven (dependency & build management),
-   SonarQube (code quality & security scanning),
-   Liquibase (database schema migrations),
-   JUnit (backend unit tests),
-   GitHub (version control & pu l request workflows),
-   Azure Cloud & Azure DevOps (pipelines, repos, boards).

-   Understanding of SDLC methodologies, including Agile/Scrum and Waterfall.
-   Ability to work both independently and within a team migrating from legacy to modern stacks.
-   English proficiency at B2 CEFR or equivalent.

**Preferred knowledge / experience:**

-   Strong ability to analyze and understand complex legacy source code, map dependencies, determine migration paths, and align technical decisions with business objectives.
-   Experience with Spring Framework 6.x and Spring Boot 3.x (microservices, Actuator, Observability, native compilation optional).
-   Experience with JPA / Hibernate and migration of persistence layers to MS SQL Server.
-   Strong knowledge of JUnit/TestNG and mocking frameworks such as Mockito.
-   Familiarity with legacy and modern application platforms, including JBoss, Tomcat, Node.js, and Spring Boot.
-   Experience with integration technologies and event driven microservices, preferably using Apache Camel or Spring Integration.
-   Hands on experience with the Temporal workflow engine, especially for replacing legacy long running workflows or scheduling mechanisms.
-   Exposure to React/TypeScript frontend ecosystems or willingness to collaborate closely with React engineers during the modernization process.

## Apply

[Apply at COSMOTE GLOBAL SOLUTIONS NV](https://apply.workable.com/cosmote-global-solutions-nv/j/AFC1ED3618/apply)

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