Find a jobRecruiters

Senior Java Software Engineer

Exclusive opportunity

Onsite

Senior Java Software Engineer

MAINSYS

Senior Java Software Engineer

Skills

DockerJavaSpring BootKafkaJBoss

21 days ago

Share this opportunity

Share this opportunity to other talents of your network:
✓ Offer them a visibility boost with clients.
✓ Help your contacts find their next job.

Important information


Contract type:

Permanent

Location:

Brussels, Belgium

Work mode:

Onsite

Published on:

29 September 2026

What they need


In order to design, develop and deliver new modules to our clients, MAINSYS is looking for Senior Software Engineer who will:

  • participate in the definition of the needs and choice of architectures,
  • take part in the conceptual and technical analyses of the architecture and software components,
  • participate in the development, integration and testing of the various software components,
  • be involved in the deployment of these components in our clients’ environments.
  • lead specific changes and coordinate the various stakeholders involved.

Your Profile

  • You are a Senior Software Engineer and have a degree in computer science or equivalent [MUST HAVE]
  • At least 5 years of experience in Java development is required, with a strong focus on performance, maintainability, and ease of monitoring.
  • You speak French and are proficient in English. Dutch is an asset.
  • You have skills in Java development:
  1. Java 17+
  2. Build up and maintain REST API
  3. Spring Suite 6 and 7 (spring-rest, spring-security, spring-boot)
  4. A knowledge of JBoss EAP 8 , Jboss Server or RHBK is welcome
  5. A knowledge of Docker is an asset
  6. A knowledge of Message Queuing (IBM) and Kafka is an asset
  • You are dynamic, problem solving, self-taught, team spirit

Our Offer

  • A permanent contract
  • Work on a challenging project inside a young and dynamic team
  • A competitive salary combined with extra-legal benefits, including a mobility budget with the option to choose between a company car and/or reimbursement for sustainable transport, and even, under certain conditions, reimbursement of your mortgage or rent.
  • Access to our training platform
  • Enjoy access to the Benefits@Work platform and its exclusive offers.
  • A 13th-month bonus that can be flexibly allocated to a range of benefits
  • Homeworking facilities according to client’s policy

Other offers great for you!

These companies are also looking for great profiles

Salutech

Ingénieur Logiciel IA

Freelance

Paris, France

Onsite, Hybrid

Skills

DockerPythonTesting & QAKubernetesSoftware refactoringCI/CDObservabilityAsynchronous programming

5 days ago

Quick apply

Fakto

AI Software Engineer

€70k–€90k

Permanent contract

Neuilly-sur-Seine, France

Hybrid

Skills

LLMs / Large language modelsBackend DevelopmentDevOpsAWSTerraform

9 hours ago

Quick apply

Fakto

AI Software Engineer

€70k–€90k

Permanent contract

Paris, France

Hybrid

Skills

LLMs / Large language modelsBackend DevelopmentDevOpsAWSTerraform

5 hours ago

Quick apply

The best place to find your next move

© 2026. All Rights Reserved.

Talents

Find a job

Create a profile

Solutions and tools