Senior Director of Engineering, Generative AI

Roblox is seeking a Senior Director of Engineering, Generative AI to lead the Applied AI organization inside Roblox Build (the generative creation product). This leader owns the full applied AI stack: model strategy and routing, model adaptation and fine-tuning, code generation (CodeGen), 3D layout generation (LayoutGen), and the evaluation science and infrastructure that tells what actually works. The role spans both AI research scientists and production engineers. Hybrid in San Mateo, CA. Salary: $525,510–$573,690 USD.

• 10+ years of experience in machine learning and AI, with 5+ years in senior technical leadership roles overseeing applied AI or ML engineering organizations that have shipped generative AI systems into production at scale. • Deep technical grounding across multiple areas of applied AI, including LLM post-training (RLHF, DPO, distillation), model routing and adaptation, agentic systems, code generation, or evaluation science. • Demonstrated experience building and leading high-performing organizations spanning both AI research scientists and production engineers, including hiring, developing talent, and making difficult personnel decisions. • Strong evaluation fluency, with a track record of building eval frameworks that predict production outcomes, designing benchmarks that measure what matters, and building the infrastructure to run experiments continuously. • Experience operating cross-functionally in complex technical organizations, with the ability to influence and align across research, product engineering, and platform teams without relying on hierarchy.