Senior Java Software Engineer

About Brainsquare

Brainsquare is a solution provider specialized in designing, building and managing enterprise application landscapes. We operate at the intersection of application development, integration and collaboration platforms, combining hands-on engineering with structured delivery.

Our teams work in long-term environments where we take ownership in scaling, stabilizing and evolving complex systems.

The Context

Within one of our dedicated enterprise environments in Brussels, where we are actively scaling and evolving the application landscape, we are looking for a Senior Java Software Engineer to strengthen our team.

This is a long-term setup where we operate as part of a broader ecosystem, combining development with ongoing ownership of the applications.

Your Role

You will contribute to both the development of new capabilities and the continuous improvement of existing applications.

This role goes beyond pure development - it requires someone who is comfortable working in a build & run environment, with a strong sense of ownership.

You will:

• Contribute to and challenge functional analysis and specifications

• Design, develop, and maintain Java-based applications

• Ensure code quality through reviews and structured delivery practices

• Test and validate developments before user acceptance

• Analyze incidents, identify root causes, and implement sustainable solutions

• Maintain and improve existing systems and documentation

• Support business users and ensure application continuity

• Contribute to support processes, reporting and availability monitoring

• Collaborate closely with both IT and business stakeholders

• Participate in support rotations when required

Your Profile

We are looking for a senior profile who combines technical depth with autonomy and reliability.

• 5+ years of experience in Java backend development

• Strong experience with Java and Spring ecosystem

• Experience with relational databases (e.g. SQL Server)

• Familiar with application servers (WildFly, Glassfish, …)

• Experience with integration patterns and technologies (REST, SOAP, messaging such as ActiveMQ)

• Experience with build & deployment tooling (Maven, Jenkins, Git)

• Comfortable working in Agile environments

• Experience in support-driven contexts (incident handling, bug fixing, improvements)

• Understanding of security best practices (OWASP, OAuth, JWT, …) is a plus

• Exposure to Docker, Kubernetes, or cloud platforms is a plus

Languages

• English (mandatory)

• Dutch or French (at least one)

What We Value

• Ownership and accountability

• Pragmatic and solution-oriented thinking

• Ability to operate independently within a team setup

• Clear communication with both technical and non-technical stakeholders

• Structured way of working under pressure

Why Join Brainsquare

• Long-term involvement in complex enterprise environments

• Work within a team that combines development, integration and operational ownership

• Direct impact on how applications evolve and scale

• A straightforward and transparent way of working

Ready to Apply?

If you are looking for a role where you can combine technical depth with real ownership, we would be happy to connect.