Research Engineer - ML Infrastructure
Chaidiscovery · San Francisco office
About this role
## About Chai Discovery Chai builds the design suite for molecules. We train frontier models that learn the underlying foundations of biochemical structure and interaction, so scientists can move faster and pursue targets that other methods cannot reach. AI is reinventing life sciences the same way it reinvented software engineering, and Chai is at the forefront of this shift. Leading pharmaceutical companies like Eli Lilly, Pfizer, and Novartis are adopting our platform to power their drug discovery programs. ## About the Role Make our models performant, resource efficient, and reliable at scale by developing the core frameworks for model training and evaluation—working closely with fellow researchers and engineers. **Key responsibilities:** - Build our training stack across model, layer, and kernel levels; optimize workloads through parallelism, quantization, and custom kernels. - Profile end-to-end training runs on large GPU clusters; eliminate bottlenecks and failures; monitor throughput, utilization, and uptime. - Ensure new model architectures and training recipes scale efficiently, from early experiments to frontier-scale runs. - Make our ML training stack maximally reliable: fault tolerance, checkpointing, and deterministic orchestration for long-running, large-scale jobs. Chai's models are moving beyond protein structure prediction into real-world therapeutic engineering. This is a chance to push the frontier of AI drug design with a rigorous, craft-obsessed team. ## About You Ideal backgrounds include deep industry experience working with top AI/ML teams on the kinds of problems and systems described above, with: - Strong software system design skills - Proficiency in Python - Fluency in PyTorch or JAX We’re looking for technical spikes where you’ve gone deep and demonstrated exceptional impact on real-world problems and systems. ## We Offer - The opportunity to work at the vanguard of AI research and frontier biology, with world-class people, on a mission that matters. - A culture of high velocity and ownership. - Competitive compensation.
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