[2026] Senior Machine Learning Engineer, Natural Language Processing - PhD Early Career

Natural Language Processing (NLP) is central to enabling massive-scale communication, creation, and safety across the Roblox platform. This role offers the unique opportunity to build and deploy cutting-edge NLP, speech, and generative AI models that operate at an unprecedented scale, impacting hundreds of millions of daily users.

You will solve an extremely diverse range of high-scale language-related problems—from  real-time moderation of voice and text to automatically localizing experiences and empowering users through LLM-driven creation tools . We combine cutting-edge research with large-scale engineering to bridge experimentation and production, designing algorithms that shape the next generation of language services for our immersive, user-generated content platform.

Teams Hiring for This Role

• Safety AI Systems : Dedicated to building end-to-end ML systems for maintaining civility and safety across the platform, operating at massive scale. This includes :

Real-time Moderation : Building world-class NLP and speech models for real-time moderation of voice and text (processing over 6 billion messages daily) and advanced interventions that measurably improve user civility.

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