Jobs › US jobs › Principal Research Engineer, Post-Training
Redwood City, CA
About the Role and Team As a Principal Research Engineer on the Post-Training team, you will drive the technical vision, execution, and evolution of the systems that transform foundation models into intelligent, engaging, and aligned products. Specifically, your team focuses on post-training of top-tier OSS LLMs (such as Mistral and Qwen) to power the highly immersive role-playing chat features of Character.AI http://Character.AI.
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Collected from the employer's own careers site (Ashby). Posted 22 Jun 2026. TUNAI shows an excerpt and the facts it read from the advert; the employer's page has the full description and the application.
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