Research Engineer - AI Performance & Kernel Optimization
Zyphra · San Francisco
CHECKED 7H AGO
Frontier labonsite
At a glance
Highlights
- Optimize large-scale LLM training and inference for frontier-scale AI systems.
- Hunt bottlenecks in memory, communication, and compute to boost throughput.
- Turn low-level systems wins into real-world training and inference gains.
What they offer
- Comprehensive medical, dental, vision, and FSA plans
- 401(k) plan
- Relocation and immigration support on a case-by-case basis
- In-office snacks and meals provided
- Unlimited PTO and company holidays
Ideal candidate
Deep systems thinker who loves chasing the last 10-20% of performance and reasoning about hardware-software tradeoffs. Thrives collaborating across research and infra to translate low-level wins into frontier-scale impact.
Requirements
- Strong engineering aptitude for building reliable, high-performance systems
- Excellent low-level performance intuition for hardware-software interactions
- Eager to rapidly learn new systems, tools, and hardware environments
- Excellent communication and collaboration skills across research and engineering
- Enjoy hunting down the last 10-20% of performance
- Experience writing highly performant GPU kernels
- Experience optimizing ML workloads for large-scale training and inference
- Understanding of distributed training and parallelism schemes
- Experience using profiling and debugging tools for performance improvements
- remote policy
- In-person in San Francisco
- visa sponsorship
- Immigration support on a case-by-case basis
Lab profile
About Zyphra
San Francisco AI lab building open language and audio models and autonomous desktop agents.
What they build
- Desktop and browser-based autonomous agents
- Open language models
- Open-source audio models (ASR, TTS, speech-to-speech)
Known for
- Agentic systems and human-AI interaction
- Reinforcement learning, post-training and preference learning
- Large-scale language model pre-training
- Novel model architectures and training methods
Key facts
- Headquartered in San Francisco, California