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Founding AI Research Scientist / Engineer (Post-Training, RL, Agents)

Digital Waffle • San Francisco Bay Area
Visa Sponsorship
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Join a seed or Series A AI research startup in the Bay Area as a founding or early team member, working on cutting-edge problems in post-training, RL, and agentic systems. Own end-to-end research and engineering, from designing experiments to shipping models into production. Ideal for candidates with strong research backgrounds and hands-on experience in SFT, RLHF, RL, evals, or computer-use models.

Key Highlights
Founding or early-team roles at multiple seed/Series A AI research companies in the Bay Area
Work on RL environments, post-training research, AI security, clinical AI, and long-horizon agent simulation
Competitive compensation: $160K–$450K base plus 0.2%–1.5% equity
On-site in San Francisco/Bay Area with visa sponsorship available for several roles
Key Responsibilities
Conduct post-training research (SFT, RLHF, RL) to improve model performance
Build RL environments and benchmarks for computer-use agents
Develop AI security systems using RL for adversarial simulation and red-teaming
Create clinical AI that reads medical records and makes defensible healthcare payment decisions
Generate worlds and verifiers for long-horizon agent simulation
Technical Skills Required
Post-training (SFT, RLHF, RL) Evals Reward modeling
Benefits & Perks
$160K–$450K base salary
0.2%–1.5% equity
Visa sponsorship or transfers available for several roles
Nice to Have
PhD or MS from leading CS/ML programs (e.g., Stanford, MIT, CMU, Berkeley)
Experience at top AI labs (e.g., DeepMind, Meta)
Publications at NeurIPS, ICML, or ICLR
Experience shipping models or research systems into production

Job Description

Founding & Early Research Roles | San Francisco / Bay Area (On-site) | $160K–$450K + Meaningful Equity

The frontier labs get the headlines. The small, elite teams building what those labs depend on get the hardest problems, the most ownership and the equity to match.

I'm hiring for several seed and Series A AI research companies, all based in the Bay Area, all backed by top-tier investors, and all with teams of fewer than 15 people. Here's what they're building:

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