Desh Raj is a Senior Research Scientist at Meta since February 2024, leading initiatives to enhance response quality and naturalness in full-duplex voice models through rejection sampling at scale. Previously, Desh served as a Research Scientist at Meta, where contributions included work on post-training LLaMA-4 for full-duplex voice modeling and developing a DPO recipe for improved factuality and safety alignment. Early experiences include internships at Meta and Microsoft focusing on speech recognition technologies, alongside a role as a Research Engineer at Samsung India, which involved significant advancements in Smart Assistant features. Desh holds a PhD in Computer Science from The Johns Hopkins University and a B.Tech in Computer Science and Engineering from the Indian Institute of Technology, Guwahati.
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