# Systems Software Engineer > Raydar · San Francisco, United States · Full-time · Posted 2026-10-06 **Salary:** USD 200,000–300,000 **Workplace:** on_site ## Description About the company Our client is a technology company. The role Raydar is recruiting for this role on behalf of our client. Work on low-level performance and infrastructure engineering for a production machine learning serving platform. You will tune software for speed and efficiency, run large compute clusters, and speak directly with customers as part of a small, high-ownership team. What you'll do \- Deliver fast support for newly released open-source models, tuned for low latency and high throughput. \- Improve the model serving stack with techniques such as request batching, caching, decoding strategies and quantization. \- Write and tune low-level GPU kernels across several hardware vendors. \- Design, deploy and operate compute clusters built from mixed hardware. \- Run production inference across a varied fleet, with attention to reliability, observability and cost efficiency at scale. \- Talk with customers and help set the direction of your own work with a high degree of autonomy. ## Requirements What we're looking for \- Deep understanding of how computers work, including architecture, memory hierarchy and operating system internals, beyond application-level coding. \- Backend, infrastructure or systems experience at a well-regarded technology company or an early-stage startup. \- Real enthusiasm for using AI agents and coding tools to improve your own workflow. \- A computer science degree from a strong undergraduate program. \- Clear communication and emotional intelligence, as roughly 10 to 20 percent of the role is customer-facing. \- Comfort working on-site five days a week. Bonus points \- Experience deploying or operating infrastructure at scale, such as clusters or large GPU fleets. \- Experience with machine learning inference optimization. \- Familiarity with GPU programming. \- Academic background in low-level systems topics. \- New graduates with strong internships are welcome. ## Benefits Compensation and benefits \- Base salary: USD 200,000 to 300,000 per year \- Equity \- Health, dental and vision coverage \- Meals provided \- Unlimited paid time off \- Parental leave Location and work model \- San Francisco, CA, United States \- On-site, 5 days per week in office \- Full-time ## Apply [Apply at Raydar](https://apply.workable.com/raydar/j/4F86EA5514/apply) --- Powered by [Workable](https://www.workable.com)