Brain Co.
Machine Learning Engineer, Applied AI
San Francisco Bay Area · Hybrid · Full-time · Posted Aug 1, 2025
About the job
Build and deploy end-to-end machine learning and AI systems that help regulated institutions automate real-world workflows and make trusted decisions.
What you'll do
- Turn ambiguous customer problems into well-defined ML problems, evaluations, and production deployments.
- Own AI systems end-to-end, including model behavior, production performance, accuracy, latency, cost, and reliability.
- Work with institutional customers and contribute to AI design reviews, the paper club, and shared engineering practices.
What they ask for
- Strong understanding of machine learning, including loss functions, generalization, distribution shift, and evaluation.
- Hands-on expertise with modern AI, including LLMs and agentic systems, prompting, fine-tuning, tool use, and reasoning.
- Ability to build and compose AI approaches such as vision models, segmentation models, VLM reasoning, and rule engines.
- Comfort working on underspecified problems where data and success criteria may need to be developed.
Tools
LLMs, VLM, vision transformers, segmentation models, rule engines, RL fine-tuning
AI focus
Applied AI for institutional workflows, including document understanding, agents trained from verified outcomes, rigorous evaluation, and production decision systems.
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