Senior Research Scientist
About The Position
Want to work on one of the hardest unsolved problems in voice AI — making it actually sound like a human conversation? Most voice AI falls apart the moment a conversation gets messy. Someone interrupts, emotions shift, the flow breaks — and the model can't keep up. A small, ambitious SF startup is tackling exactly these problems, building speech models that handle natural conversation the way humans actually experience it. They have a working prototype and early commercial traction across several high-profile industry verticals. As a Senior Research Scientist, your focus is post-training — curating data, fine-tuning pre-trained speech models, and building the evaluation infrastructure that validates it all. You'll work on large-scale models with access to significant data resources.
Requirements
- PhD in ML or related field with a strong publications record
- Hands-on experience training large speech models — ASR, TTS, or speech-to-speech
- Solid post-training and SFT experience
Responsibilities
- Shape the data that goes into post-training — sourcing, cleaning and structuring it for large speech models
- Supervised fine-tuning of pre-trained speech models
- Build evaluation workflows — automated and human-in-the-loop
- Drive measurable improvements in hallucination rates, instruction-following and generalisation
Benefits
- Relocation support for those in US and willing to make the move
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
Ph.D. or professional degree
