Principal Network Engineer – Deployment (APAC)

Nscale; Singapore; Hybrid; SGD 180,000 - 260,000; Full time

Job summary

Nscale Singapore is seeking a Principal Network Engineer to build and bring up the networks behind our GPU clusters across Asia-Pacific. Based in Singapore, you’ll join the Deployment organization, owning every step from hardware arrival on site through to customer acceptance, and you’ll work closely with teams in Europe and the United States.

This is a hands-on role at an early stage of our APAC expansion.

Qualifications

• 10+ years of network engineering experience in large-scale data centre, cloud, or HPC environments.
• Experience at a hyperscaler or major network vendor or comparable large-scale network.
• Strong hands-on knowledge of routing and switching: BGP, OSPF, EVPN/VXLAN, ECMP, L2/L3 data centre design.

Responsibilities

• Deploy, configure, and validate high-performance Ethernet and InfiniBand fabrics for large GPU clusters at APAC sites.
• Bring up front-end, storage, and management networks and WAN edge connectivity for new sites and expansions.
• Work with carriers, colocation providers, and IXPs across APAC to deliver circuits, cross-connects, and peering.
• Run network acceptance testing and performance validation ahead of customer handover.
• Troubleshoot and resolve issues across routing, switching, optics, and cabling during build and early life.
• Apply Nscale's global reference designs and build standards, and feed back learnings to Network Architecture.
• Build and improve automation for provisioning, configuration, and validation.
• Partner with Technical Program Managers, Data Centre Operations, and vendors to keep builds on schedule.
• Write clear runbooks and documentation so builds are repeatable across sites and regions.

Skills

Network engineering

BGP OSPF EVPN VXLAN

InfiniBand RoCE

Network automation (Python Ansible)

APAC market knowledge

Troubleshooting under deadline

Tools

SONiC

Cumulus

Job description

About Nscale

Nscale is the GPU cloud engineered for AI. We provide cost-effective, high-performance infrastructure for AI start-ups and large enterprise customers. Nscale enables AI-focused companies to achieve superior results by reducing the complexity of AI development. Our GPU cloud bolsters technical capabilities and directly supports strategic business outcomes, including cost management, rapid innovation, and environmental responsibility.

We thrive on a culture of relentless innovation, ownership, and accountability, where every team member takes pride in their work and drives it with excellence and urgency. As an Nscaler, you'll build trust through openness and transparency, where everyone is inspired to do their best work. If you join our team, you'll be contributing to building the technology that powers the future.

About the Role

We're looking for a Principal Network Engineer to build and bring up the networks behind Nscale's GPU clusters across Asia-Pacific. Based in Singapore, you'll join our Deployment organisation, a build org that owns every step from hardware arrival on site through to customer acceptance.

This is a hands-on engineering role at an early stage of our APAC expansion. You'll take network designs into production: configuring and validating cluster fabrics, front-end networks, and WAN edge, troubleshooting issues during bring-up, and making sure every build is ready for customers. You'll work closely with colleagues in Europe and the US, so some flexibility across time zones is part of the job. The role involves regular travel to sites and partners across the region.

What You'll be Doing

• Deploy, configure, and validate high-performance Ethernet and InfiniBand fabrics for large GPU clusters at our APAC sites.
• Bring up front-end, storage, and management networks and WAN edge connectivity for new sites and expansions in the region.
• Work with carriers, colocation providers, and IXPs across APAC to deliver circuits, cross-connects, and peering.
• Run network acceptance testing and performance validation ahead of customer handover.
• Troubleshoot and resolve issues across routing, switching, optics, and cabling during build and early life.
• Apply Nscale's global reference designs and build standards, and feed back what you learn in the field to Network Architecture.
• Build and improve automation for provisioning, configuration, and validation.
• Partner with Technical Program Managers, Data Centre Operations, and vendors to keep builds on schedule.
• Write clear runbooks and documentation so builds are repeatable across sites and regions.

About You

• 10+ years of network engineering experience in large-scale data centre, cloud, or HPC environments.
• Experience at a hyperscaler or major network vendor (e.g. Microsoft, AWS, Oracle/OCI, Cisco) or a comparable large-scale network.
• Strong hands-on knowledge of routing and switching: BGP, OSPF, EVPN/VXLAN, ECMP, and L2/L3 data centre design.
• Experience deploying and operating cluster networks, ideally including InfiniBand or RoCE fabrics.
• Familiarity with the APAC data centre and carrier landscape, including working with regional providers.
• Practical experience with network automation (Python, Ansible, or similar).
• Calm, methodical troubleshooter who can work under deadline pressure on live builds.
• Willingness to travel across Asia-Pacific as needed.

Nice to Have

• Experience building networks for GPU clusters or AI training environments.
• Familiarity with HPC topologies (Fat Tree, Rail) and 400G/800G optics.
• Experience with SONiC, Cumulus, or other open networking platforms.
• WAN, subsea or long-haul fibre, peering, or DWDM experience.
• Experience standing up infrastructure in a new region or market.
• Industry certifications such as CCNP/CCIE, JNCIP/JNCIE, or NVIDIA networking certifications.

Why this role matters

The network is what turns thousands of GPUs into a single system. As one of our first network engineers in APAC, you'll shape how Nscale builds in the region and how quickly new clusters reach customers there.

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