Expert Java & microservices

Médiane Système; Brussel; Sur place; EUR 90 000 - 130 000; Plein temps

Avantages offerts par ce poste

Attractive salary package

Mobility package (transport or car)

DKV

Group Insurance

Meal vouchers

Eco vouchers

Training opportunities

Résumé du poste

Médiane Benelux is seeking a Senior Java Expert to join our signalling design platform team. You will design and implement microservices-based solutions with Java 21, Spring Boot, and REST APIs, in an Agile context.

A strong business mindset, security awareness, and documentation discipline are essential. You will collaborate with cross-functional teams across Belgium, contribute to quality standards (ISO 9001, EN 50128, ISO 27001), and help ensure scalable, maintainable software for railway

Qualifications

• Minimum 10+ years of Java development experience.
• At least one project using Java 21.
• 5+ years with relational databases (MySQL, MariaDB, Oracle).
• 2+ years with Spring Boot and Spring Data.
• 2+ years with microservices and REST APIs.
• 10+ years with unit testing (JUnit 5, Mockito, PowerMock).
• 2+ years Agile/Scrum experience.
• 10+ years with Maven for build and dependency management.
• Experience with OpenShift and/or Kubernetes.
• 2+ years with Liquibase and/or Flyway.
• Git and GitLab proficiency.
• Strong design patterns and architecture knowledge.
• Railway systems project awareness is a plus.

Responsabilités

• Design, develop, and maintain microservices-based applications.
• Contribute to architectural decisions with cybersecurity in mind.
• Collaborate in an Agile/Scrum environment to deliver scalable solutions.
• Work with business stakeholders for user-focused, value-driven outcomes.
• Ensure ISO 9001, EN 50128, and ISO 27001/NIS compliance.
• Maintain thorough technical documentation for audits and QA.
• Promote innovation and continuous improvement within the team.

Connaissances

Java

Spring Boot

Microservices

REST API

JUnit 5

Hibernate

SQL

Kubernetes

Git

OpenShift

Outils

Maven

GitLab

Liquibase

Flyway

OpenShift

Kubernetes

JPA/Hibernate

JUnit

MySQL

Oracle

MariaDB

PowerMock

Description du poste

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.

This role requires both technical excellence and a strong business mindset, with a focus on quality, security, and compliance with industry standards.

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
• 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

• Attractive salary package
• additional legal days off
• mobility package (transport or car)
• DKV
• Group Insurance
• Meal vouchers
• Eco vouchers
• Training opportunities