Mission Overview:
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.
Responsibilities:
Coordination & Support
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Support the design, testing, deployment, and implementation of new solutions.
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Collaborate with team members to troubleshoot and resolve performance issues in supported applications and systems.
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Ensure the stability, efficiency, and reliability of critical business solutions.
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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.
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Take ownership of assigned tasks, assess risks, and escalate when necessary.
Business Analysis & Requirements Management
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Analyse, challenge, and formalise business needs related to telecom and IT applications.
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Translate operational and technical requirements into clear and comprehensive functional specifications.
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Conduct impact analyses, feasibility studies, and risk assessments.
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Define and optimise existing processes (AS‑IS / TO‑BE).
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Work closely with Product Owners, network engineers, architects, and IT teams to ensure solution consistency.
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Participate in change management and user training activities.
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Monitor deliverable quality, ensure functional validation, and support testing phases.
Solution Architecture & Technical Design
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Design end-to-end solution architectures that align business objectives with technical capabilities, enterprise standards, and operational constraints.
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Produce and maintain architecture deliverables, including solution designs, architecture diagrams, integration flows, sequence diagrams, and technical specifications.
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Define application, data, integration, and process architectures for new and existing solutions.
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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.
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Define and validate application, data, and integration architectures, including APIs, authentication mechanisms, connectivity models, and interactions with internal and external systems.
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Refine, challenge, and document non-functional requirements, including availability, performance, scalability, security, resilience, maintainability, and auditability.
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Evaluate architectural options, technologies, and integration patterns, assessing feasibility, trade-offs, risks, costs, and long-term sustainability, and facilitate decision-making with relevant stakeholders.
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Ensure seamless integration between telecom platforms, business applications, databases, middleware, APIs, and external systems while complying with security, governance, regulatory, and operational requirements.
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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.
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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.
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Provide technical guidance and support during design, development, testing, and deployment phases.
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Contribute and support to solution design decisions involving cloud technologies, microservices, APIs, event-driven architectures, databases, automation platforms, and DevOps/CI-CD practices.
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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
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Work effectively within a multilingual, interdisciplinary team.
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Communicate complex business and technical concepts clearly to both technical and non-technical stakeholders.
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Act as a trusted advisor to business stakeholders by balancing functional needs with architectural and technical considerations.
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Contribute as a team player while being fully capable of working independently.
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Demonstrate initiative, leadership, problem-solving skills, and a proactive approach to continuous improvement and innovation.
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Facilitate stakeholder discussions and support informed decision-making by clearly presenting architectural options, risks, trade-offs, and recommendations.
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Promote knowledge sharing and contribute to the continuous improvement of architecture, development, and operational practices across teams.
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Translate complex technical concepts into clear and actionable information for both technical and non-technical audiences.
Required experience:
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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.
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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.
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Experience designing and documenting complex solutions, including architecture diagrams, process models, technical specifications, and integration architectures.
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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.
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Experience evaluating technical solutions, architectural alternatives, and emerging technologies through feasibility studies, technology assessments, and Proof of Concepts (PoCs) in complex, multi-vendor environments.
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Understanding of telecom technologies is a strong asset: Mobile networks (2G/3G/4G/5G), VoIP, SIP, IMS, IP Data communication.
Profile description:
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Ability to translate business needs into functional and technical requirements.
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Experience with testing, validation, and application deployment.
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Knowledge of Agile methodologies (Scrum, Kanban) is an advantage.
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Familiarity with modelling tools (BPMN, UML) is a plus.
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Strong analytical mindset, leadership skills, and critical thinking.
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Ability to manage multiple tasks or projects simultaneously.
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Pragmatic, solution‑oriented approach to technical and functional challenges.
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Curious, proactive, and eager to learn new technologies.
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Strong communication and documentation skills.
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Discrete, stress‑resistant, and reliable in sensitive environments.
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Ability to work with multilingual and interdisciplinary teams.
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Fluent in French or Dutch, with solid understanding of the other language.
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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 .
Duration: 01/09/2026 - 31/12/2026 4 months • (full time)
Skills required:
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BPMN - Level: Confirmed - Most recent: Any time
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IP Data Communication - Level: Confirmed - Most recent: Any time
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Mobile networks (2G/3G/4G/5G) - Level: Confirmed - Most recent: Any time
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Solution architect - Level: Confirmed - Most recent: Any time
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VoIP, SIP, IMS - Level: Confirmed - Most recent: Any time
Language requirements:
Dutch or French
Level Active knowledge
English
Level Active knowledge
