Roblox

Senior Software Engineer- User Behavior

Roblox
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4 hours ago
San Mateo, CA, USASenior

Base Salary

$197k - $243k/yr

Responsibilities

  • Design and operate a low-latency per-user behavioral data layer aggregating safety signals into a queryable source of truth.
  • Build and evolve a centralized consequence engine combining deterministic rules and ML risk signals.
  • Create a unified backend-driven framework for delivering feature restrictions and other safety interventions.
  • Develop a scalable abuse-reporting framework integrating LLM classification, agentic review workflows, ML models, routing, prioritization, and reporter feedback.
  • Build serving infrastructure with strong explainability, fairness, auditability, and regulatory compliance.
  • Own end-to-end delivery from system design through migration, testing, and production operation.
  • Perform monitoring, alerting, on-call support, capacity planning, and incident response for user-facing systems.

Requirements

  • 5+ years of experience building and operating production backend systems at scale.
  • Experience with Go or a comparable statically typed backend language.
  • Strong distributed-systems experience, including service APIs, RPC/gRPC, high-throughput event ingestion, data modeling, caching, and low-latency read paths.
  • Experience building and evolving rules engines, workflow or decision systems, or stateful business-logic services.
  • Experience with streaming or batch data pipelines feeding a feature store or similar ingestion layer.
  • Experience partnering with ML engineers who consume backend data systems.
  • Solid production-operations experience with monitoring, alerting, on-call, capacity planning, and incident response.
  • Preferred experience in Trust & Safety, fraud, risk, adversarial domains, feature stores, ML-serving infrastructure, or backend-driven UI frameworks.

Benefits

  • Full-time employees are eligible for equity compensation and benefits.
  • San Mateo office roles are onsite Tuesday, Wednesday, and Thursday, with optional presence Monday and Friday.
  • The stated annual base salary range for San Mateo roles is $196,750–$243,290 USD.

Tech Stack

GogRPC

Categories

Roblox

About Roblox

5,001-10,000 employees

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.

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