Scale automated 3D asset validation for Roblox's avatar marketplace

Roblox's Avatar Heads and Bodies team needs a senior engineer to extend existing automated systems that validate user-generated 3D marketplace assets — schema compliance, geometry-based exploit detection, and programmatic quality metrics — before they reach hundreds of millions of users. This is deep geometric-processing work (meshes, rigging, skinning weights) done in collaboration with ML teams, not greenfield systems building.

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What this interview tests

3D math and linear algebra for geometric processing
Mesh/topology analysis and geometry-based exploit detection
Avatar schema compliance, rigging, and skinning weights
Scaling and optimizing existing validation pipelines
Translating marketplace policy into programmatic, quantitative rules
Cross-functional collaboration with ML and artist teams

Common question themes

Detect a geometry-based exploit in an uploaded 3D asset

Optimize a mesh/texture validation pipeline for runtime efficiency

Explain rigging/skinning weight compliance checks

Translate ambiguous policy requirements into testable metrics

Collaborate with ML teams on asset quality pipelines

How candidates describe it

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