HubMub
-
Cosmote Global Solutions

Software Engineer Java Specialist

Cosmote Global Solutions
Luxembourg · Contract · Not Applicable
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

    Key Skills

    Ranked by relevance

    java microservices spring boot devops apache react sql shell scripting oracle kafka cloud unix cicd
    Login to Apply
    🇱🇺

    Country Guide

    Luxembourg

    High-value international enterprise and fintech hub

    Posted
    Apr 23, 2026
    Type
    Contract
    Level
    Not Applicable
    Location
    Luxembourg
    Company
    Cosmote Global Solutions

    Industries

    IT Services IT Consulting

    Categories

    Other

    Related Jobs

    3 roles aligned with this opportunity

    View all jobs
    View Job Details
    Code Compass 🧭
    Related

    PHP Software Engineer (80%-100%) - Zurich

    2026-05-28

    Full-time
    Mid-Senior
    Switzerland
    Staffing
    Information Technology
    View Job Details
    Devoteam
    Related

    Senior DevOps Engineer

    2026-05-22

    Full-time
    Mid-Senior
    Luxembourg
    IT Services
    Consulting
    View Job Details
    Mindrift
    Related

    Senior Python Data Scraping Engineer (Freelance)

    2026-05-28

    Part-time
    Not Applicable
    Finland
    IT Services
    Other