Posted 2 months ago
Software Engineer - Host and Network IO
@ Cerebras Systems
Toronto, Ontario
Overview
Cerebras Systems is hiring a software engineer for its Host and Network IO team to build the software path that moves data between server nodes, the cluster network and the custom Cerebras chip. The role involves network performance debugging, low-level IO API development and tooling for AI workloads.
Responsibilities:
- Develop x86 and ARM software exposing next-generation hardware IO capabilities
- Drive network performance debugging of large AI clusters
- Analyze network statistics and packet traces to remove bottlenecks
- Build tools and telemetry for network and IO datapath visibility
- Optimize CPU and memory use with kernel bypass and zero-copy techniques
Requirements summary:
- Master's/PhD in CS or EE plus 1 year, or 3+ years industry experience
- Network protocol knowledge (TCP, RoCE) and debug tools such as Wireshark
- Embedded systems, HW/SW co-design and driver development
- Socket programming and RDMA Verbs expertise
- Experience in large software environments
Tools & skills
Source and dates
Employer career site / ATS feed · ashby
- Employer posting date
- 2026-09-10
- First seen by our source
- 2026-10-08
- Source record updated
- 2026-10-09
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Department | Software development |
| Experience | 3+ years |
| Hours per week | 40 (estimated) |
| Work setting | Office |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
| Education | Master’s degree (preferred), Doctorate (preferred) |
| Fields of study | Computer Science, Electrical Engineering |
Summary and details written by AI from the posting; the employer’s posting is the authority.
Cerebras Systems
Saved company profile
Historical company information from a saved The Jobs API profile (LinkedIn/Crunchbase fields). It is not live-verified; figures may have changed. Missing values remain unknown.
The World's Fastest AI Inference
Full company description
Cerebras Systems is the world's fastest AI inference. We are powering the future of generative AI. We’re a team of pioneering computer architects, deep learning researchers, and engineers building a new class of AI supercomputers from the ground up. Our flagship system, Cerebras CS-3, is powered by the Wafer Scale Engine 3—the world’s largest and fastest AI processor. CS-3s are effortlessly clustered to create the largest AI supercomputers on Earth, while abstracting away the complexity of traditional distributed computing. From sub-second inference speeds to breakthrough training performance, Cerebras makes it easier to build and deploy state-of-the-art AI—from proprietary enterprise models to open-source projects downloaded millions of times. Here’s what makes our platform different: 🔦 Sub-second reasoning – Instant intelligence and real-time responsiveness, even at massive scale ⚡ Blazing-fast inference – Up to 100x performance gains over traditional AI infrastructure 🧠 Agentic AI in action – Models that can plan, act, and adapt autonomously 🌍 Scalable infrastructure – Built to move from prototype to global deployment without friction Cerebras solutions are available in the Cerebras Cloud or on-prem, serving leading enterprises, research labs, and government agencies worldwide. 👉 Learn more: www.cerebras.ai Join us: https://cerebras.net/careers/
- LinkedIn followers
- 119,613
- People associated on LinkedIn
- 970
- Reported office locations
- 1237 E Arques Ave, Sunnyvale, California 94085, US
- 150 King St W, Toronto, Ontario M5H 1J9, CA
- Tokyo, JP
- Bangalore, IN
- Business categories
- Semiconductor
- Artificial Intelligence
- Software
- Hardware
- RISC
- Artificial Intelligence (AI)
- AI Infrastructure
- Computer
- Other recorded names
- Cerebras Systems
- Cerebras
- Specialties
- artificial intelligence
- deep learning
- natural language processing
- inference
- machine learning
- llm
- AI
- enterprise AI
- and fast inference
- Profile identifies a recruitment agency
- No
- Reported total investment
- 4,674,771,259
Currency and observation date were not supplied; this is not a current valuation or a funding round.
Cerebras Systems is the world's fastest AI inference. We are powering the future of generative AI. We’re a team of pioneering computer architects, deep learning researchers, and engineers building a new class of AI supercomputers from the ground up. Our flagship system, Cerebras CS-3, is powered by the Wafer Scale Engine 3—the world’s largest and fastest AI processor. CS-3s are effortlessly clustered to create the…
| Field | Value |
|---|---|
| Industry | Semiconductor Manufacturing |
| Company size | 501-1,000 employees |
| Headquarters | Sunnyvale, California |
| Organization type | Privately Held |
| Specialties | artificial intelligencedeep learningnatural language processinginferencemachine learningllmAIenterprise AIand fast inference |
| Open jobs on Jobsy | 41 |
| View page |
Cerebras Systems builds the world's largest AI chip, 56 times larger than GPUs. This architecture allows Cerebras to deliver industry-leading training and inference speeds; over 10 times faster than GPU-based hyperscale cloud inference services.
This order of magnitude increase in speed is transforming the user experience of AI applications, unlocking real-time iteration and increasing intelligence via additional agentic computation.
Cerebras works with the leading model labs, global enterprises, and cutting-edge AI-native startups. OpenAI recently announced a multi-year partnership with Cerebras, to deploy 750 megawatts of scale, transforming key workloads with ultra high-speed inference.
About The Role
The Host and Network IO Team develops the full IO path implementation between a distributed system of server nodes, through the cluster, down to the custom RoCE network stack implemented in Cerebras' system, and over the proprietary IOs onto the WSE. As a software developer on the team, you will interface between AI application-level IO teams, cluster architecture teams, and FPGA/ASIC teams to develop solutions that optimize bandwidth and latency while minimizing congestion, pauses, pause spreading, unfairness, etc. Strong skills in socket programming will enable you to deploy robust management operations, while deftness in RDMA Verbs will enable you to optimize CPU resources and shape network traffic to deliver real world impact on AI performance metrics, as well as developing tools for gaining insight and visibility into network behavior. Meticulous analysis and rigour are key tenants of this role, harnessing that together with a deeply-understood mental model of the server, NIC, protocol, switch, and custom hardware behavior will enable you to lead network debug, optimize traffic patterns, and prescribe architectural changes.
Responsibilities
Develop x86 & ARM software to expose next-generation hardware IO capabilities for AI/HPC application teams
Govern a generic IO API with multiple internal users.
Develop control and configuration subsystems directly interacting with Cerebras hardware
Drive network performance debug of large AI clusters
Gather and analyze network statistics and packet traces to root cause and alleviate bottlenecks and sub-optimalities.
Develop tools/telemetry for increasing visibility into the network and IO datapath.
Optimize cpu/mem utilization leveraging kernel bypass and zero-copy techniques
Integrate leading edge networking technologies and protocols
Lead cross-functional technical projects spanning multiple teams and integrating diverse software and hardware components to deliver an improved network IO solution.
Foster clear and effective communication across teams and stakeholders.
Skills & Qualifications
Master's/PhD in Computer Science or Electrical Engineering + 1 year industry experience, OR 3+ years industry experience.
Experience in large software environments.
Embedded systems, HW/SW co-design, and some driver development.
Network protocol familiarity (TCP, RoCE) and network debug tools such as Wireshark, or willingness to learn
Some network switch environment familiarity or willingness to learn (Arista, Juniper, etc.).
Detail-oriented but keen to learn the bigger picture and step out of comfort zone to embrace the unknown.
Why Join Cerebras
People who are serious about software make their own hardware. At Cerebras, we have built a breakthrough architecture that is unlocking new opportunities for the AI industry. With dozens of model releases and rapid growth, we’ve reached an inflection point in our business. Members of our team tell us there are five main reasons they joined Cerebras:
Build a breakthrough AI platform beyond the constraints of the GPU.
Publish and open source their cutting-edge AI research.
Work on one of the fastest AI supercomputers in the world.
Enjoy job stability with startup vitality.
Our simple, non-corporate work culture that respects individual beliefs.
Find out more about what it's like to work at Cerebras here!
Apply today and become part of the forefront of groundbreaking advancements in AI!
Cerebras Systems is committed to creating an equal and diverse environment and is proud to be an equal opportunity employer. We celebrate different backgrounds, perspectives, and skills. We believe inclusive teams build better products and companies. We try every day to build a work environment that empowers people to do their best work through continuous learning, growth and support of those around them.
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