Research Scientist - LLM

Retell AI is a fast-growing startup reimagining the call center with advanced voice AI technology. The role of Founding Machine Learning Research Engineer involves researching and developing new techniques for human-like voice agents, focusing on improving model capabilities in real-time environments.

Responsibilities:

• Research & Experimentation – Explore and develop new techniques across LLMs and audio models to improve reasoning, latency, and conversational quality in real-time systems
• Model Prototyping – Rapidly build and iterate on experimental models and pipelines, turning research ideas into working prototypes
• Evaluation & Benchmarking – Design novel evaluation frameworks, datasets, and metrics to measure performance on complex, real-world voice tasks
• Bridge Research to Production – Collaborate closely with engineering to translate research insights into deployable systems
• Human Feedback Loops – Develop methods to incorporate human evaluation into model improvement, especially for subjective conversational quality
• Advance the Frontier – Stay at the cutting edge of ML research and bring new ideas into Retell’s product and infrastructure