3 days ago
San Mateo, CA, USASenior
Base Salary
$260k - $313k/yr
Responsibilities
- Design and iterate on retrieval, ranking, and generative recommendation models for Marketplace and other shopping experiences.
- Optimize models for large-scale training and serving, including compute, latency, and cost constraints, while partnering with ML infrastructure engineers.
- Own end-to-end ML solutions from data and feature exploration through modeling, evaluation, and production deployment.
- Develop models and policies for pricing, conversion, revenue, ecosystem health, payer experience, and creator success.
- Design and analyze A/B tests and multi-cell experiments tied to engagement, bookings, and creator earnings.
- Monitor production model data and prediction quality, detect drift and regressions, and help define ML service on-call practices.
- Partner with Product, Backend, Data Science, Design, Marketplace, Payments, and Developer Monetization teams on roadmaps and success metrics.
- Contribute to modeling, experimentation, and long-term reward optimization strategy for the Economy ML team.
- Mentor engineers through design reviews, code reviews, and hands-on guidance.
Requirements
- At least 3 years of industry experience building recommendation, search, or ranking systems for a high-scale product.
- Deep hands-on expertise with sequential user-behavior models, multi-task ranking, large sparse embeddings, and efficient multi-GPU training and serving.
- Experience balancing model quality, latency, and cost; pricing or content-understanding experience is a plus.
- Strong coding skills in Python and PyTorch and experience taking ML systems from messy data and ambiguous problems through stable production deployment.
- Experience designing experiments, diagnosing metric movements, and maintaining statistical rigor and ecosystem guardrails.
- Ability to reason about the effects of model choices on LTV, engagement, conversion, and creator earnings.
- Experience applying LLM or multimodal techniques to recommendation is a plus.
- Ability to collaborate across engineering, product, data science, design, Marketplace, Payments, and Developer Monetization teams.
- Ability to contribute to technical direction, challenge assumptions, and balance quick wins with foundational investments.
Benefits
- Full-time employees are eligible for equity compensation and benefits.
- For San Mateo headquarters roles, the starting base pay is $260,300-$312,970 annually.
- Office-based roles are onsite Tuesday, Wednesday, and Thursday, with optional presence Monday and Friday.
- Roblox provides equal employment opportunities and reasonable accommodations during the recruiting process.
Categories
About Roblox
Roblox builds a platform for user‑generated 3D experiences, offering Roblox Studio for creators and a social marketplace where players explore and interact across devices. Its business model centers on virtual currency (Robux) and subscriptions, platform fees paid to creators, and an expanding advertising offering. Founded in 2004 and headquartered in San Mateo, California, Roblox Corporation is publicly traded on the NYSE under the ticker RBLX.