Senior Solution Architect & Business Analyst (Freelance possible)

This role supports specialised judicial and operational activities in a highly sensitive environment. You will contribute to the reliability, optimisation and ongoing enhancement of critical business and telecommunications applications used in legally regulated investigative contexts.

You will act as the link between operational stakeholders, IT teams, developers, infrastructure specialists and telecom experts, translating needs into robust, secure and scalable solutions. The position combines business analysis with solution architecture, system integration and close collaboration across multidisciplinary teams.

️ Responsibilities:

Business analysis & requirements management

• Analyse, challenge and formalise business needs related to telecom and IT applications.
• Translate operational and technical needs into clear functional and technical specifications.
• Carry out impact analyses, feasibility studies and risk assessments.
• Define and improve existing processes using AS-IS / TO-BE modelling.
• Work closely with product stakeholders, network engineers, architects and IT teams to ensure consistent solution design.
• Support change activities, functional validation, testing phases and user enablement.

Solution architecture & technical design

• Design end-to-end solution architectures aligned with business objectives, technical capabilities, enterprise standards and operational constraints.
• Produce and maintain architecture deliverables such as solution designs, architecture diagrams, integration flows, sequence diagrams and technical specifications.
• Define application, data, integration and process architectures for both new and existing solutions.
• Develop target-state architectures that close identified gaps and remain feasible within organisational and technical constraints.
• Define and validate architectures involving APIs, authentication mechanisms, connectivity models and interactions with internal and external systems.
• Refine and document non-functional requirements including availability, performance, scalability, security, resilience, maintainability and auditability.
• Assess architectural options, technologies and integration patterns, weighing feasibility, trade-offs, risks, costs and long-term sustainability.
• Ensure smooth integration between telecom platforms, business applications, databases, middleware, APIs and external systems in line with security, governance, regulatory and operational requirements.
• Participate in architecture reviews, contribute to technology roadmaps, and support or coordinate Proof of Technology and Proof of Concept activities.
• Work closely with development teams throughout the lifecycle, providing guidance on architecture principles, integration standards, design patterns and software engineering best practices.
• Contribute to design decisions involving cloud technologies, microservices, APIs, event-driven architectures, databases, automation platforms and DevOps/CI-CD practices.
• Use sufficient hands-on technical insight to understand code structures, integration mechanisms, data models and development constraints, and to effectively challenge and support implementation teams.

Coordination & operational support

• Support the design, testing, deployment and implementation of new solutions.
• Help troubleshoot and resolve performance issues in supported applications and systems.
• Safeguard the stability, efficiency and reliability of critical solutions.
• Create and maintain documentation including procedures, architectural diagrams, technical specifications, test plans, user guides and support materials.
• Take ownership of assigned work, identify risks and escalate when appropriate.

Collaboration & communication

• Collaborate effectively in a multilingual and interdisciplinary environment.
• Communicate complex business and technical topics clearly to both technical and non-technical stakeholders.
• Act as a trusted advisor by balancing functional needs with architectural and technical considerations.
• Work autonomously while contributing strongly as a team player.
• Facilitate stakeholder discussions and support informed decisions by presenting options, risks, trade-offs and recommendations in a clear way.
• Promote knowledge sharing and contribute to the continuous improvement of architecture, development and operational practices.

Your profile

• Proven experience in roles such as Senior Business Analyst, Solution Architect, Technical Business Analyst, Application Architect, or similar positions focused on solution design, system integration and stakeholder management.
• Strong understanding of application architecture, enterprise systems, system integration and the Software Development Life Cycle (SDLC).
• Experience working closely with development, DevOps, infrastructure and business teams.
• Experience designing and documenting complex solutions, including architecture diagrams, process models, technical specifications and integration architectures.
• Solid knowledge of modern technologies and architectural principles, including cloud platforms, APIs, microservices, integration patterns, SQL/NoSQL databases and non-functional requirements.
• Experience evaluating technical solutions and architectural alternatives through feasibility studies, technology assessments and Proof of Concepts in complex environments.
• Ability to translate business needs into functional and technical requirements.
• Experience with testing, validation and application deployment.
• Knowledge of Agile methodologies such as Scrum and Kanban is an advantage.
• Familiarity with modelling tools such as BPMN and UML is a plus.
• Strong analytical mindset, leadership skills and critical thinking.
• Ability to manage multiple tasks or projects simultaneously.
• Pragmatic and solution-oriented when addressing technical and functional challenges.
• Curious, proactive and eager to learn new technologies.
• Strong communication and documentation skills.
• Discrete, stress-resistant and reliable in sensitive environments.
• Ability to work with multilingual and interdisciplinary teams.
• Fluent in French or Dutch, with a solid understanding of the other national language.
• Good command of written and spoken technical English.
• Knowledge of telecom technologies is a strong asset, especially mobile networks (2G/3G/4G/5G), VoIP/SIP/IMS and IP data communication.

A TOP SECRET level security clearance is required for this position, in accordance with the applicable legal framework on classification and security clearances.

Presence at the office at least three days per week is expected; telework is permitted on the remaining days.

Offer

You will be part of a growing Belgian SME where initiative and personal development are encouraged. We will provide you with an enjoyable work environment with fun colleagues. We will work out a career plan with you, with attention and a budget for extra education/certification. You can count on an attractive salary, supplemented with extra-legal benefits, including a company car.
(Freelance is also possible)