Network Engineer, Supercomputing

Bison; San Francisco (CA); On-site; USD 350,000 - 475,000; Full time

Benefits offered by this job

Health insurance

Dental benefits

Vision benefits

Unlimited PTO

Parental leave

Relocation support

Job summary

Thinking Machines is hiring a network engineer to own the lowest layers of the network stack for large-scale training and inference. You will ensure interconnect reliability across GPU fabrics, including RDMA/RoCE, NVLink, and NVSwitch, while building instrumentation and tooling for faster debugging.

You’ll work cross-stack with researchers and cloud providers, translating complex networking challenges into reliable, scalable systems.

Qualifications

• Bachelor’s degree or equivalent in CS, engineering, or similar.
• Proficiency in at least one backend language (Python or Rust).
• Experience operating large-scale clusters and container orchestration systems (Kubernetes or Slurm).
• Comfort operating across the stack and owning projects end-to-end.
• Thrive in a highly collaborative environment with cross-functional partners.
• Bias for action and initiative to work across stacks and teams to ship.

Responsibilities

• Reason about and validate GPU network fabric design across deployments.
• Debug RDMA / RoCEv2 across NIC vendors; diagnose NCCL/PFC/ECN issues.
• Own NVLink / NVSwitch interconnect and health, errors, and integration with collectives.
• Build host-level network instrumentation and dashboards using Linux tooling.
• Triage cross-cloud fabric quirks across NICs, drivers, kernels, switches, and workloads.
• Drive escalations with cloud-provider networking teams to resolution.

Skills

Backend development

System design

Collaboration

Initiative

Education

Bachelor’s degree or equivalent in CS/Engineering

Tools

Kubernetes

Slurm

Linux

NCCL

NVLink/NVSwitch

Job description

About Thinking Machines

The mission of Thinking Machines is to build AI that extends human will and judgment. We are training frontier models with Inkling, developing Tinker to let people make models their own, and crafting interfaces that broaden human-AI communication. We believe the future worth building is human, and we're hiring people who want to build it.

About the Role

We're looking for a network engineer to own the lowest layers of the network stack that our large-scale training and inference depend on. A single degraded link or flapping NIC can quietly slow a long training run or take it down outright; you'll be responsible for interconnect reliability at scale, across large GPU fabrics — both the RDMA/RoCE fabric between nodes and the NVLink/NVSwitch domains within them.

This is a hands-on, cross-stack role. You'll debug production collectives down to the NIC, build the instrumentation and tooling that makes the next debugging session dramatically faster, and serve as the technical point of contact who drives issues to resolution with our cloud providers' networking teams. Your goal is for our researchers to trust the fleet without worrying about the fabric underneath.

Note: This is an "evergreen role" that we keep open on an on-going basis to express interest. We receive many applications, and there may not always be an immediate role that aligns perfectly with your experience and skills. Still, we encourage you to apply. We continuously review applications and reach out to applicants as new opportunities open. You are welcome to reapply if you get more experience, but please avoid applying more than once every 6 months. You may also find that we put up postings for singular roles for separate, project or team specific needs. In those cases, you're welcome to apply directly in addition to an evergreen role.

What You’ll Do

• Reason about and validate GPU network fabric design across our deployments.

• Debug RDMA / RoCEv2 across different NIC vendors. Diagnose collective failures of production NCCL, PFC/ECN tuning, and congestion control behavior.

• Own NVLink / NVSwitch interconnect — including fabric manager and IMEX health, link and lane errors, and how the GPU fabric interacts with collectives.

• Build host-level network instrumentation and use Linux tooling to build dashboards and alerts, not just the bug report.

• Navigate cross-cloud fabric quirks across providers and triage across the NIC, driver, kernel, switch, and workload boundaries.

• Drive escalations with cloud-provider networking teams, owning issues end-to-end until they're resolved.

Skills and Qualifications

Minimum qualifications:

• Bachelor’s degree or equivalent experience in computer science, engineering, or similar.

• Proficiency in at least one backend language (we use Python or Rust).

• Experience operating large‑scale clusters and container orchestration systems (e.g. Kubernetes or Slurm).

• Comfort operating across the stack and owning projects end-to-end.

• Thrive in a highly collaborative environment involving many, different cross-functional partners and subject matter experts.

• A bias for action with a mindset to take initiative to work across different stacks and different teams where you spot the opportunity to make sure something ships.

Preferred qualifications — we encourage you to apply if you meet some but not all of these:

• Fluency with host-level debugging tools on Linux.

• Strong communication skills, internally and with cloud providers.

• Extensive experience with at least one of the following:

• Familiarity with cloud network primitives across at least two cloud providers.

• Hands‑on experience with NVLink / NVSwitch, fabric manager, and IMEX.

• Statistical rigor in reliability reasoning — comfort reasoning about failure and error rates, distributions, and base rates, and the judgment to separate signal from noise when characterizing a large fabric.

• A track record of writing tooling that made the next debugging session meaningfully faster.

• Familiarity with CUDA/NCCL and performance profiling for distributed training and inference.

• Understanding of deep learning frameworks and their underlying system architectures.

Logistics

• Location: This role is based in San Francisco, California.

• Compensation: Depending on background, skills and experience, the expected annual salary range for this position is $350,000 - $475,000 USD.

• Visa sponsorship: We sponsor visas. While we can’t guarantee success for every candidate or role, if you’re the right fit, we’re committed to working through the visa process together.

• Benefits: Thinking Machines offers generous health, dental, and vision benefits, unlimited PTO, paid parental leave, and relocation support as needed.