Principal Machine Learning Engineer, Alt Defense

Roblox
San Mateo
Workplace: OnsiteFull timeUSD 328,610 - 399,420 annuallyFunction: Data Science & Machine LearningExperience: 10+ yearsEducation: phdSkills: ["Resourceful","Analytical","User oriented","Team oriented","Mission oriented"]

Lead the technical vision for alternate account detection, evolving systems from reactive responses to proactive, near real-time prevention at massive scale. Architect high-scale graph-based ML using Graph Neural Networks and clustering to map relationships across billions of entities, while tackling ground-truth and adversarial training data challenges. Deliver low-latency detection within minutes, drive the ML roadmap with big behavioral signals, and mentor a pod of ML and software engineers.

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FursaFursa
Roblox
Roblox
2 days ago

Principal Machine Learning Engineer, Alt Defense

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Source: Company careers pageValidated by: Fursa AI
Last checked: 6 hours agoStatus: Live
Reposted: similar role first listed 7 months ago

Job Summary

Lead the technical vision for alternate account detection, evolving systems from reactive responses to proactive, near real-time prevention at massive scale. Architect high-scale graph-based ML using Graph Neural Networks and clustering to map relationships across billions of entities, while tackling ground-truth and adversarial training data challenges. Deliver low-latency detection within minutes, drive the ML roadmap with big behavioral signals, and mentor a pod of ML and software engineers.
Location: San Mateo
Workplace: Onsite
Employment Type: Full time
Job Function: Data Science & Machine Learning
Seniority: Mid level

Key Responsibilities

  • •Lead the technical vision for alternate account detection, shifting from reactive measures to proactive, near real-time prevention.
  • •Architect high-scale ML systems using GNNs and clustering to map relationships across billions of entities.
  • •Address complex ground truth and training data challenges for adversarial use cases.
  • •Build for latency and scale so detection occurs within minutes of a bad actor’s attempt to rejoin.
  • •Mentor and up-level a pod of high-performing ML and software engineers, fostering technical excellence and rapid iteration.

Pay and Benefits

Salary: USD 328,610 - 399,420 annually
Equity and Bonus:Equity

Key Requirements

  • •MS or PhD in Computer Science, Machine Learning, or a related field.
  • •10+ years of industry experience in applied ML with a significant focus on anti-abuse, fraud, integrity, or identity.
  • •Deep expertise in graph learning, including large-scale GNNs (e.g., GraphSAGE, PGB) and unsupervised/semi-supervised clustering at the scale of billions of nodes.
  • •Proven experience leading complex technical projects from conception through production-level deployment.
  • •Experience deploying ML models in low-latency, high-throughput environments where time-to-detect is critical.
Experience:10+ yearsAnti-abuseFraudIntegrityIdentityAdversarialHigh-throughput systemsLow-latency ML
Education:PhD / Doctorate in Computer Science, Machine Learning, or a related field
Skills:ResourcefulAnalyticalUser orientedTeam orientedMission oriented
Tech Stack:Machine LearningGraph Neural Networks (GNNs)GraphSAGEPGBClusteringBig dataBehavioral signals

Company Brief

Roblox
Operates an online platform for user-generated games and virtual experiences, enabling creators to build, publish, and monetize interactive 3D experiences for a global community of players.
Industry: Gaming
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Public Company
Valuation: Public Company (Market Cap in USD)
Funding: IPO / Publicly Listed
Headquarters: San Mateo, United States
Founded: 2004
WebsiteLinkedIn