Senior Business Analyst Solution Architect

Keystone Solutions is seeking a skilled and motivated Senior Business Analyst - Solution Architect for a consultancy mission at a client site. In this role, you will ensure the reliability, optimization, and continuous improvement of critical business and telecommunication applications. As a consultant, you will act as a key interface between business stakeholders, IT teams, developers, infrastructure teams, and telecom experts, ensuring that business requirements are translated into scalable, secure, and sustainable technical solutions., Coordination & Support

• Support the design, testing, deployment, and implementation of new solutions.
• Collaborate with team members to troubleshoot and resolve performance issues in supported applications and systems.
• Ensure the stability, efficiency, and reliability of critical business solutions.
• Create and maintain comprehensive documentation, including procedures, architectural diagrams, technical specifications, test plans, user guides, and support materials. Ensure that the end user’s needs are properly addressed.
• Take ownership of assigned tasks, assess risks, and escalate when necessary.

Business Analysis & Requirements Management

• Analyse, challenge, and formalise business needs related to telecom and IT applications.
• Translate operational and technical requirements into clear and comprehensive functional specifications.
• Conduct impact analyses, feasibility studies, and risk assessments.
• Define and optimise existing processes (AS-IS / TO-BE).
• Work closely with Product Owners, network engineers, architects, and IT teams to ensure solution consistency.
• Participate in change management and user training activities.
• Monitor deliverable quality, ensure functional validation, and support testing phases.

Solution Architecture & Technical Design

• Design end-to-end solution architectures that align business objectives with technical capabilities, enterprise standards, and operational constraints.
• Produce and maintain architecture deliverables, including solution designs, architecture diagrams, integration flows, sequence diagrams, and technical specifications.
• Define application, data, integration, and process architectures for new and existing solutions.
• Drive the definition of target-state architectures that address identified gaps, meet business and technical requirements, are supported by stakeholders, and remain feasible within organisational and technical constraints.
• Define and validate application, data, and integration architectures, including APIs, authentication mechanisms, connectivity models, and interactions with internal and external systems.
• Refine, challenge, and document non-functional requirements, including availability, performance, scalability, security, resilience, maintainability, and auditability.
• Evaluate architectural options, technologies, and integration patterns, assessing feasibility, trade-offs, risks, costs, and long-term sustainability, and facilitate decision-making with relevant stakeholders.
• Ensure seamless integration between telecom platforms, business applications, databases, middleware, APIs, and external systems while complying with security, governance, regulatory, and operational requirements.
• Participate in architecture reviews, contribute actively to technology roadmaps, and conduct or coordinate Proof of Technologies (PoTs) and Proof of Concepts (PoCs) and technical feasibility assessments to validate solution approaches.
• Work closely with development teams throughout the solution lifecycle, providing technical guidance and ensuring adherence to architectural principles, integration standards, design patterns, and software engineering best practices.
• Provide technical guidance and support during design, development, testing, and deployment phases.
• Contribute and support to solution design decisions involving cloud technologies, microservices, APIs, event-driven architectures, databases, automation platforms, and DevOps/CI-CD practices.
• Possess sufficient hands-on technical knowledge to understand application code structures, integration mechanisms, data models, and development constraints, and to effectively challenge, support and guide implementation teams.

Collaboration & Communication

• Work effectively within a multilingual, interdisciplinary team.
• Communicate complex business and technical concepts clearly to both technical and non-technical stakeholders.
• Act as a trusted advisor to business stakeholders by balancing functional needs with architectural and technical considerations.
• Contribute as a team player while being fully capable of working independently.
• Demonstrate initiative, leadership, problem-solving skills, and a proactive approach to continuous improvement and innovation.
• Facilitate stakeholder discussions and support informed decision-making by clearly presenting architectural options, risks, trade-offs, and recommendations.
• Promote knowledge sharing and contribute to the continuous improvement of architecture, development, and operational practices across teams.
• Translate complex technical concepts into clear and actionable information for both technical and non-technical audiences.

• Proven 5-7 years of experience as a Senior Business Analyst, Solution Architect, Technical Business Analyst, Application Architect, or a similar role involving solution design, system integration, and stakeholder management.
• Strong understanding of application architecture, enterprise systems, system integration, and the Software Development Life Cycle (SDLC), with 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, databases (SQL/NoSQL), and non-functional requirements such as performance, availability, scalability, and security.
• Experience evaluating technical solutions, architectural alternatives, and emerging technologies through feasibility studies, technology assessments, and Proof of Concepts (PoCs) in complex, multi-vendor environments.
• Understanding of telecom technologies is a strong asset: Mobile networks (2G/3G/4G/5G), VoIP, SIP, IMS, IP Data communication.

Profile description:

• Ability to translate business needs into functional and technical requirements.
• Experience with testing, validation, and application deployment.
• Knowledge of Agile methodologies (Scrum, Kanban) is an advantage.
• Familiarity with modelling tools (BPMN, UML) is a plus.
• Strong analytical mindset, leadership skills, and critical thinking.
• Ability to manage multiple tasks or projects simultaneously.
• Pragmatic, solution-oriented approach to 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 solid understanding of the other language.
• Good command of written and spoken technical English.

A ‘TOP SECRET’ level security clearance is required for this position. as referred to in the law of 11/12/1998 on classification, security clearances, attestations, and notices.

If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today ., * BPMN - Level: Confirmed - Most recent: Any time

• IP Data Communication - Level: Confirmed - Most recent: Any time
• Mobile networks (2G/3G/4G/5G) - Level: Confirmed - Most recent: Any time
• Solution architect - Level: Confirmed - Most recent: Any time
• VoIP, SIP, IMS - Level: Confirmed - Most recent: Any time

Language requirements:

Dutch or French Level Active knowledge English Level Active knowledge