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.