Senior Java Developer

Médiane Système limited; Brussel Hoofdstad; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Attractive salary package

Mobility package (transport or car)

Group Insurance

Meal vouchers

Eco vouchers

Training opportunities

Job summary

Médiane Benelux is seeking an experienced Senior Java Developer to join a team delivering critical applications supporting digital transformation and operational excellence in the railway ICT sector. The consultant will contribute to high-impact projects in a dynamic ICT environment, working in an Agile/Scrum team of software engineers and analysts, with emphasis on security, quality, and reliability.

The ideal candidate will bring deep Java expertise, strong collaboration skills, and a

Qualifications

• Java expertise with v8 or higher (min 10 years)
• Spring Framework experience (min 15 years)
• TDD experience (JUnit, Mockito, etc.)
• CI/CD tooling (Git, Jenkins, Artifactory)
• DevOps practices (CI/CD, automation)
• Hibernate & JPA proficiency
• SQL databases (PostgreSQL, MySQL, Oracle)

Responsibilities

• Design, develop, and maintain Java applications.
• Ensure high-quality code through testing and documentation.
• Apply Test-Driven Development (TDD) principles to ensure reliability.
• Participate in Agile/Scrum ceremonies and continuous improvement.
• Implement CI/CD pipelines and DevOps practices for automation.
• Troubleshoot and resolve complex bugs and performance issues.
• Maintain a secure, well-structured codebase complying with standards.

Skills

Java

Spring Framework

JUnit/Mockito

CI/CD

Hibernate/JPA

SQL databases

Education

Bachelor's degree in Computer Science

Tools

Git

Jenkins

Artifactory

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

POSTE / MISSIONS

We are seeking an experienced Senior Java Developer to join a team responsible for designing, developing, and maintaining critical applications supporting digital transformation and operational excellence in the railway ICT sector.

The consultant will contribute to high-impact projects within a dynamic ICT environment, working in an Agile/Scrum team of software engineers and analysts. All developments must adhere to the highest standards of security, quality, and reliability.

The Ideal Candidate Will Demonstrate

Understanding of the sector's IT landscape, strategic challenges, and operational environment.

Ability to integrate seamlessly into teams while embodying core professional values: benevolence, courage, positivity, and reliability.

Professional excellence and behavioral fit, including clear communication, strong presentation skills, respect for management, and responsible commitment for the project duration.

Key Responsibilities

• Design, develop, and maintain Java applications.
• Ensure high-quality code through rigorous testing and documentation.
• Apply Test-Driven Development (TDD) principles to maintain software reliability.
• Participate in Agile/Scrum ceremonies and contribute to continuous improvement initiatives.
• Implement CI/CD pipelines and DevOps practices for enhanced automation and deployment.
• Troubleshoot and resolve complex bugs and performance issues.
• Maintain a secure, maintainable, and well-structured codebase compliant with internal standards.

PROFIL RECHERCHÉ

Required Technical Skills

• Java (v8 or higher) – minimum 10 years' experience
• Java development & bug fixing – minimum 15 years' experience
• Spring Framework – minimum 15 years' experience
• Test-Driven Development (JUnit, Mockito, etc.) – minimum 10 years' experience
• CI/CD tools (Git, Jenkins, Artifactory) – minimum 10 years' experience
• DevOps principles – minimum 10 years' experience
• Hibernate & JPA – minimum 15 years' experience
• SQL databases (PostgreSQL, MySQL, Oracle) – minimum 15 years' experience

Languages

• Fluent in French or Dutch – level C1
• Good knowledge of the second national language – level B1

Soft Skills

• Strong team spirit and excellent communication skills
• Proactive, solution-oriented mindset
• Autonomy, precision, and reliability in execution
• Ability to document and comply with quality and security norms (ISO 9001, ISO 27001, EN 50.128)
• Continuous learning attitude and adaptability to new technologies

AVANTAGES

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