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Senior/Principal Machine Learning Engineer, Voice Safety

Roblox

$289,460 - $338,270
Oct 3, 2025
San Mateo, CA, US
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Roblox is looking to build systems that monitor real-time user interactions, including voice chat, to detect and address problematic content such as profanity, hate speech, and personal information (PII) to ensure the platform remains safe and civil.

Requirements

  • Over 7 years of experience in designing and building deep learning solutions for speech and language modeling.
  • Capable of breaking down product requirements into iterative deliverable stages.
  • Experience in launching computer vision models into production.

Responsibilities

  • Build end-to-end ML systems to detect and address problematic voice communication and content on Roblox.
  • Drive the evolution of our speech moderation into a scalable, adaptable system that supports dozens of customer teams with unique needs
  • Develop innovative detection approaches in a rapidly evolving landscape.
  • Use a data-driven lens to think creatively, strategically, and adversarially to identify opportunities.
  • Shape the team's roadmap and technical direction.
  • Drive execution, establish strong technical foundations, and mentor junior engineers.
  • Partner with Moderation Operations, PM, Data, and stakeholders across Roblox.

Other

  • MS or PhD degree in Computer Science, Machine Learning, Speech and Language Modeling, Deep Learning, or a related field.
  • Resourceful: You're adaptable in any situation and can always find a path forward.
  • Analytical: Excited to investigate large, ambiguous problems, and quantify the problems and the solutions.
  • User Oriented: You always start with the needs of the user, whether they are Roblox users or internal engineers before architecting a solution.
  • Team Oriented: You lift up your peers and find ways to make the team stronger. You are a sought-after mentor. You foster a culture of technical excellence.
  • Mission Oriented: You stay laser-focused on the mission and are versatile, creative, and strategic to achieve it. You think long-term, and find ways to deliver short-term value on the way to get there.