Job Description

Location: Sydney, Australia

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About the Company

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A rapidly growing technology organisation is building next-generation AI infrastructure and cloud platforms across APAC and is looking for a Principal Network Architect to lead the design and evolution of its national and international backbone network.

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This is a highly strategic technical role focused on building a scalable, resilient and vendor-neutral connectivity architecture across terrestrial fibre, subsea networks, optical transport, IP backbone and data-centre interconnection.

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You will work closely with carriers, fibre providers, subsea operators, data centres, technology vendors and internal engineering teams, acting as a key technical authority for backbone architecture and connectivity strategy.

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Key Responsibilities

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- Own the architecture and technical direction of the national and international backbone network.
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- Design and evolve terrestrial fibre, subsea, optical and IP backbone infrastructure.
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- Define network standards, reference architectures and reusable design patterns.
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- Ensure high levels of resilience, route diversity and SRLG protection.
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- Lead technical evaluation and selection of carriers, subsea providers and network vendors.
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- Develop technical requirements, RFPs and vendor evaluation criteria.
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- Provide technical assurance across design, delivery, migration and operational readiness.
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- Lead complex network changes, migrations and cutovers.
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- Work closely with Network Engineering, Data Centre and Operations teams.
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- Mentor senior engineers and contribute to long-term connectivity strategy.
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- 10+ years' experience designing and operating large-scale backbone networks.
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- Principal/Lead Architect or Distinguished Engineer-level experience.
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- Background within a carrier, hyperscaler, cloud, data-centre or AI infrastructure setting.
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- DWDM / OTN / coherent optics
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- 100G / 400G / 800G
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- IP/MPLS & Segment Routing
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- EVPN & traffic engineering
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- SRLG and network resilience
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- Experience working with carriers, fibre providers, subsea operators and major network vendors.
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- Strong architecture, technical assurance and stakeholder management skills.
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📌 Principal Network Architect (New South Wales)
🏢 Hamilton Barnes
📍 New South Wales