Domain Architect NNA

A job at Proximus? You'll find that everything revolves around the idea 'Think Possible'. This means: we always assume that something is possible, even if it seems impossible. Well, especially so, actually. Call it a way of thinking that involves being open to a world of digital solutions that make our lives easier. And our way of working smarter.

Context

You are part of the NBU/NIT organization (Network IT), within the NAA domain (Network Activation & Automation).
This domain manages and evolves OSS (Operations Support Systems) that enable the activation of Telco services—Data, TV, Internet, Voice, and more—across the various Proximus networks for customer-facing divisions such as CBU, EBU, and CWS.

Beyond daily operational support, Proximus OSS is undergoing a major transformation to align with a modern, open, digital network vision. This includes adopting industry standards such as TMF and leveraging cloud technologies like Azure, while integrating new technological capabilities including 5G, SD-WAN, and uCPE.

In this context, your role as Domain Architect is to collaborate with peers in defining and realizing the next-generation OSS stack, ensuring alignment with Proximus strategic architecture, business needs, and market best practices. You'll the end‑to‑end view of the activation chain—from requirements clarification to solution design, E2E test definition, and operational support—for both simple and highly complex projects.

Responsabilities

As a Domain Architect, you will:

Strategic Alignment

• Understand the business vision, strategy, and project roadmaps.
• Ensure complete, relevant, and clear operational requirements are captured.
• Contribute to the creation of an OSS architecture roadmap, defining realistic steps aligned with business priorities.
• Promote industrialized, reusable, automated solutions over point fixes; align designs with TMF best practices and NIT strategy.

Solution Architecture

• Translate functional and non‑functional requirements into reliable, scalable, and efficient architecture designs by producing functional blueprints (context/flow diagrams, sequence diagrams, information models), E2E activations flows and integration patterns (API/Event-driven).
• Work collaboratively with domain architects, functional analysts, and technical teams to deliver end‑to‑end solutions across applications.
• Provide continuous architecture support to delivery teams (backlog refinement, design clarifications, decision logs).
• Convert the roadmap into EPICs and user stories that drive delivery within the new OSS solution.

Cross‑Domain Collaboration

• Engage with colleagues across NBU and DTI to understand the impact of projects on Proximus networks by acting as single solution contact for OSS
• Provide coaching and guidance to promote NIT's vision and strategic direction.

E2E Quality & Operational Readiness

• Define E2E OSS test strategy & scenarios covering business flows, non-functional requirements and operational use-cases (happy paths, fallouts, …
• Ensure smooth handover to operations with up-to-date documentation and knowledge transfer

Your profile

Education & Experience

• Master's degree in IT or telecommunications, or equivalent professional experience.
• Strong background in IT architecture within complex environments.
• Hands-on with agile methodologies, with familiarity in waterfall models and UML.
• Proven experience in telco OSS/BSS will be considered as a strong asset.

Technical & Industry Know‑How

• Understanding of business processes and large enterprise automation systems.
• Strong command of TM Forum concepts; hands‑on TMF implementation experience is a major asset.
• Awareness of modern telecom network management trends (e.g., SDN/NFV, MEF models).
• Good knowledge of one or several residential and professional telecom services is an advantage.
• Familiarity with cloud‑native principles (Azure), CI/CD pipelines, infrastructure as code, and security‑by‑design.

Soft Skills

• Strong analytical mindset with the ability to anticipate impacts of complex solutions.
• Creative, optimistic, solution‑oriented, and comfortable navigating ambiguity.
• Fully customer‑oriented, with excellent communication and natural collaboration habits.
• Highly motivated to learn and continuously develop.
• Strong facilitation and stakeholder alignment skills

Languages

• Good command of English (oral and written).
• Knowledge of one of Belgium's national languages is a strong additional asset.