Roblox is looking to build and evolve ML systems that power personalization, pricing, search, and content understanding across all Economy surfaces, including Marketplace, Developer Monetization, Payments, and Avatar. The company aims to solve unique technical challenges at scale and create safer, more civil shared experiences for everyone by leveraging AI/ML and Generative AI.
Requirements
- Deep expertise in building recommendation systems, ranking infrastructure, or real-time personalization engines
- Hands-on experience with Generative AI, such as transformer-based models, LLMs, embeddings, or RAG pipelines
- Proven experience with distributed training, model deployment, and GPU-accelerated workflows
- Strong understanding of ML system architecture: data pipelines, feature stores, inference optimization, experimentation tooling
- Systems-first mindset with strong instincts around scale, cost, performance, and reliability
- 10+ years of experience in software engineering or ML infrastructure, with a strong focus on large-scale ML systems
- Track record of leading large technical initiatives and mentoring senior engineers
Responsibilities
- Set the technical direction for ML systems powering core economy experiences: personalization, ranking, generative modeling, and more
- Build and evolve infrastructure for training, serving, and evaluating both traditional ML models and Generative AI models (e.g., embedding-based retrieval, transformers, LLM-based workflows)
- Partner with GenAI teams to explore multi-modal embeddings, avatar generation, and retrieval-augmented generation (RAG) in economic surfaces
- Lead efforts to optimize ML system performance: low-latency serving, efficient GPU training, and cost-aware inference strategies
- Guide the development of robust ML pipelines, online feature stores, and experimentation platforms that support both predictive and generative use cases
- Ensure robustness, observability, and scalability of ML systems that power millions of daily economic interactions
- Own the architecture behind some of Roblox’s most foundational ML systems
Other
- Collaborate with EMs, tech leads, and product partners to align technical architecture with business priorities
- Mentor senior engineers and help establish a strong technical culture across the Economy ML team
- Work across groups at Roblox to advance the state of ML/AI at the company.
- Help scale a fast-growing ML organization and define Roblox’s future economy intelligence stack
- Solve real-world problems with real user impact, powering millions of personalized, intelligent economic interactions every day
