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Roblox

Principal/Senior Machine Learning Scientist - Search and Discovery

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

In this role as a Principal/Senior Machine Learning Scientist at Roblox, you will design and implement machine learning solutions for search and discovery systems, focusing on enhancing user experiences through innovative models like LLMs and VLMs. Your work will involve developing recommendation systems, query understanding, and content retrieval, while collaborating with various teams to ensure a user-centered approach. This position is pivotal in shaping how users discover and interact with content on the platform.

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

  • 7+ years of experience for principal or 4+ years for senior in designing and building scalable machine learning solutions
  • Experience with transformer based model training, inference, and product integration
  • BS, MS, or PhD in Computer Science or a related discipline or equivalent experience
  • Ability to break down product requirements into iterative deliverable stages
  • Experience initiating and facilitating challenging technical decisions across multiple teams
  • Strong focus on user needs in technical solutions

Nice to have

  • Depth in recommendation, search retrieval and ranking, or LLM post-training and agentic systems

What you get

  • Equity compensation
  • Benefits as described in the posting

Worth weighing

  • No specific mention of remote work flexibility beyond the specified onsite days
  • Salary range provided but may vary based on various factors
  • Position may not support future H-1B sponsorship

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.

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