PitchMeAI Jobs
Roblox

Principal Model Optimization Engineer

Roblox · San Mateo, CA, United States

Posted about 3 months ago

or apply directly on Roblox's site. We never take the application ourselves.

Is this posting real?

This role has been open
87 days
Roblox's roles stay open a median of 87 days
Reposted
No
Salary listed
No
0% of Roblox's roles list one
Ghost-job risk at Roblox
high
234 stale, 9 reposted of 234 open
Hiring momentum
313 roles opened in the last 90 days
↑ up vs. the prior 90 days
Last confirmed on the employer's board
2026-10-29

Measured from postings appearing on and disappearing from Roblox's own greenhouse board since 2026-08-03. Full hiring picture for Roblox.

About this role

As a Principal Model Optimization Engineer at Roblox, you will lead the design and improvement of the machine learning platform, focusing on enhancing the performance and reliability of ML infrastructure. Your responsibilities include managing GPU resources, defining success metrics, and collaborating with ML engineers to streamline their workflows. You will also conduct deep investigations into performance issues and mentor other engineers to elevate the technical standards within the team.

Our read on this posting2.4out of 5
benefits
1/5
freshness
1/5
career value
5/5
role clarity
5/5
pay transparency
0/5

Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of Roblox as an employer.

What you need

  • 6+ years of professional experience in system design for building performant systems
  • Track record of building ML infrastructure end to end, including training pipelines and model serving
  • Experience designing widely adopted SDKs, APIs, or developer tools
  • Hands-on experience running GPU workloads at scale on Kubernetes
  • Depth in training and inference performance concepts
  • Experience leading cross-team technical work without direct authority

What you get

  • Equity compensation
  • Benefits as described in the posting

Worth weighing

  • No specific mention of remote work flexibility beyond onsite days
  • Salary range provided but may vary based on multiple factors
  • No details on the company's culture or team dynamics

Summarised from Roblox's posting. Read the full original.

Listed by Roblox on their greenhouse job board, last confirmed open on 2026-10-29. PitchMeAI is not the employer.

More roles at Roblox

All 234 open roles at Roblox →