Expert Java & microservices

Médiane Système limited

Brussel Hoofdstad

On-site

EUR 90,000 - 130,000

Full time

2 days ago

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Benefits offered by this job

Attractive salary package

Mobility package

DKV

Group Insurance

Meal vouchers

Eco vouchers

Training opportunities

Additional legal days off

Job summary

Médiane Benelux is seeking a Senior Java Expert to join an Agile team of Java and Angular specialists, contributing to a microservices-based platform built on modern practices.

You will design, develop, and maintain robust applications while aligning with cybersecurity principles and railway-sector expectations. The role emphasizes high-quality documentation and proactive collaboration with stakeholders.

Qualifications

10+ years Java development experience.
Experience with Java 21 and relational databases.
2+ years Spring Boot / Spring Data
2+ years microservices and REST APIs
Hibernate / JPA 10 years
JUnit 5 / Mockito / PowerMock
2+ years Agile/Scrum
10 years Maven usage
OpenShift and/or Kubernetes exposure
Liquibase and/or Flyway experience
Git / GitLab version control knowledge
Knowledge of design patterns and software architecture

Responsibilities

Design, develop, and maintain microservices-based applications.
Ensure cybersecurity-aligned architecture decisions.
Collaborate in Agile/Scrum to deliver scalable solutions.
Work with stakeholders for user-oriented, value-driven results.
Maintain rigorous documentation for audits and quality monitoring.
Promote innovation and continuous improvement within the team.

Skills

Java development

Spring Boot

Spring Data

Microservices

REST API

JSON

JPA / Hibernate

JUnit 5 / Mockito

Maven

OpenShift / Kubernetes

Liquibase / Flyway

Git / GitLab

Design patterns

Software architecture

Relational DBs

French/Dutch proficiency

English proficiency

Tools

OpenShift

Kubernetes

Git

GitLab

MySQL

MariaDB

Oracle

Job description

Médiane Benelux: Career Booster! Since 2017, and with over 35 years of experience in France and Italy, Médiane Benelux is an engineering company specializing in software, electronics, and cybersecurity across key sectors such as Railways, Automotive, Energy, Medical, Aerospace, Space, Telecoms, Industry, and Defense.

What We Offer

IT consulting and strategy
Digital transformation and IoT solutions
Project management and process optimization

As specialists in electronics, development, and embedded systems design, we operate from sensor to cloud.

Why choose Médiane Benelux?

Human-sized company: Promotes teamwork and collaboration in a dynamic and stimulating environment
Sharp technical expertise and tailored solutions for each sector
Talent support: Personalized follow-up, continuous training, and skill development for our employees
Custom solutions tailored to the specific needs of each client
Culture of innovation: Participation in innovative and varied projects
Ecovadis Gold certification: Commitment to equality, well-being, and responsibility
Human values: Commitment, Respect, Trust, Listening

"Happy at Work" and "Happy Clients" labels by Choose my Company: A fulfilling work environment and optimal client satisfaction

Job Description

Within the signalling design platform unit, we are looking for a Senior Java Expert to join an Agile team of Java and Angular specialists. You will contribute to the design and implementation of an innovative platform built on modern microservices principles.

Main Responsibilities

Design, develop, and maintain applications based on a microservices architecture.
Contribute to architectural decisions and ensure alignment with cybersecurity principles.
Collaborate proactively in an Agile/Scrum environment to deliver high-quality, scalable solutions.
Work closely with business stakeholders to ensure a user-oriented and value-driven approach.
Ensure compliance with ISO 9001 (quality), EN 50128 (signalling), and ISO 27001 / NIS (information security) standards.
Maintain rigorous technical documentation to support audits and quality monitoring.
Promote innovation and continuous improvement within the team.

Profile / Requirements

Languages

French and/or Dutch: C2 – full professional proficiency
English: C1 – professional working proficiency

Technical Expertise

Minimum 10 Years Of Experience In Java Development

At least one project using Java 21
At least 5 years of experience with relational databases (MySQL, MariaDB, Oracle)
Minimum 2 years with Spring Boot and Spring Data
Minimum 2 years with microservices architecture and web services (REST API, JSON)
At least 5 years of experience with JPA and Hibernate
10 years of experience with unit testing frameworks (JUnit 5, Mockito, PowerMock)

Minimum 2 Years Of Experience With Agile/Scrum Methodology

10 years of experience using Maven for build and dependency management
At least one project involving OpenShift and/or Kubernetes

Minimum 2 Years Of Experience With Liquibase And/or Flyway

Minimum 2 years with Git and GitLab version control systems
Solid knowledge of design patterns and software architecture principles

Soft Skills & Expected Behaviours

Clear understanding of the strategic impact of the role in railway systems projects.
Core values expected: kindness, courage, positivity, reliability.
Strong communication and presentation skills
Ability to work independently and proactively within a team.
Commitment to quality, documentation, and long-term engagement.

Benefits