Roblox · 2 months ago
Principal Machine Learning Engineer, Content & Communication Safety
San Mateo, CA, United States
Full-time
Onsite
Lead/Staff
$289K/yr - $338K/yr
8+ years expRoblox is a platform that allows users to explore, create, play, learn, and connect in immersive digital experiences. They are seeking a Principal Machine Learning Engineer for Safety AI Systems to define the future of proactive moderation through innovative ML solutions, guiding the technical strategy and execution for content and communication safety.
3D TechnologyGamingMetaverseOnline GamesSoftwareVideo Games
Responsibilities
Define and Own the Technical Vision: Define and lead the multi-year technical vision, architectural strategy, and execution for machine learning solutions across Content and Communication Safety, ensuring these systems proactively and effectively detect and prevent high-severity, critical harms at massive scale
Provide Principal-Level Architecture: Act as the highest technical authority for the Content Safety ML domain, guiding the architecture and long-term maintainability of foundational models, data pipelines, and real-time inference services
Drive Cross-Org Alignment: Identify and champion the most ambiguous, high-leverage technical problems, driving alignment and securing investment for organization-wide ML infrastructure and platform development initiatives that benefit all of Trust & Safety
Lead Innovation in Safety: Oversee the adoption and safe deployment of innovative technologies (e.g., advanced NLP, self-supervised learning, multimodal LLMs) to anticipate and mitigate novel abuse vectors, moving beyond reactive detection to proactive intervention
Strategic Stakeholder Partnership: Collaborate with executive-level Product, Data Science, Policy, and Operations leaders to define and prioritize the strategic machine learning roadmap, influencing product strategy and demonstrating the impact of ML on user trust and safety outcomes
Qualification
Required
8+ years of experience designing, developing, and operating large-scale, high-impact machine learning systems in a production environment
5+ years of experience in technical leadership, management, or mentorship roles, ideally having managed Engineering Managers or Principal/Staff-level individual contributors
A proven track record of successfully setting the long-term technical direction for an entire ML domain or pillar, demonstrating the ability to take ambiguous problems from concept to scaled production impact
Deep expertise in advanced ML architectures, including Large Language Models (LLMs), transfer learning, or other foundation model technologies, especially applied to text or multimodal data
Expertise in architecting scalable, real-time ML inference services and robust data pipelines operating at millions of requests per second
Demonstrated success in leading and resolving high-stakes, cross-functional conflicts and technical disagreements, with an ability to build consensus among diverse stakeholders
Exceptional product sense and strategic planning ability: able to translate platform safety requirements into an achievable, iterative technical roadmap
Preferred
A Visionary Architect: Capable of synthesizing complex business and safety goals into a clear, compelling, and actionable technical strategy
An Inspiring Leader: Passionate about developing the next generation of technical leaders, managers, and engineers
Comfortable with Ambiguity: You thrive in undefined or open-ended problem spaces, providing structure, clarity, and decisive direction to your teams
An Executive Communicator: Highly effective at communicating complex technical concepts to both engineering teams and non-technical executive leadership
Committed to Ethical AI: Dedicated to building ML systems that are fair, transparent, and operate with the utmost responsibility toward user safety and platform civility
Benefits
Equity compensation
Benefits as described on this page
Company
Roblox
Roblox is an online gaming and entertainment platform that offers a shared digital experience that brings people together through play.
1001-5000 employees
H1B Sponsorship
Roblox has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (240)
2024 (111)
2023 (139)
2022 (153)
2021 (91)
2020 (92)
Funding
Current Stage
Public CompanyTotal Funding
$874.45MKey Investors
Andreessen HorowitzAltos Ventures
2024-10-01Post Ipo Equity
2022-04-12Series Unknown· $17.71M
2021-08-11Series Unknown
Leadership Team
David Baszucki
Founder and CEO
Michael Guthrie
CFO
Recent News
2026-01-11
2026-01-11
Company data provided by crunchbase