Senior Java Middleware Developer (EU Legislative Systems)

Confidential

Brussels, Brussels, Belgium permanent

Posted: January 30, 2026

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Quick Summary

Design and develop complex architecture components and building blocks for a large-scale IT system, working closely with cross-functional teams to ensure seamless integration of heterogeneous systems and data analysis to inform design decisions.

Required Skills

Middleware Systems Messaging Services JEE Angular Akoma Ntoso Communication Skills Analysis Problem-Solving Documentation Technical Meetings

Job Description

Tasks for External Service Provider:

• Install, configure, monitor, and troubleshoot application architecture.

• Manage complex architecture and integrate heterogeneous systems.

• Architecture and design of information systems.

• Review the architecture of existing systems.

• Design and develop architecture components and building blocks (back-end/front-end).

• Analyze the integration of different information systems.

• Perform data analysis and data modeling.

• Coordinate the implementation of the technical architecture.

• Act as a technical interface between project leaders and developers.

• Produce software architecture documents.

• Participate in technical working groups, progress meetings, and user meetings.

• Provide assistance during testing, analysis, technical documentation, deployment, evaluation, and reporting.

• Implement and develop key features.

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