Principal/Senior Machine Learning Scientist - Search and Discovery

Every day, tens of millions of people come to Roblox to explore, create, play,

learn, and connect with friends in 3D immersive digital experiences– all created

by our global community of developers and creators.

At Roblox, we’re building the tools and platform that empower our community to

bring any experience that they can imagine to life. Our vision is to reimagine

the way people come together, from anywhere in the world, and on any device.

We’re on a mission to connect a billion people with optimism and civility, and

looking for amazing talent to help us get there.

A career at Roblox means you’ll be working to shape the future of human

interaction, solving unique technical challenges at scale, and helping to create

safer, more civil shared experiences for everyone.

With Roblox’s daily active users growing at a record pace, we are seeking

experienced machine learning researchers who thrive on solving complex

challenges and designing scalable, ground breaking solutions. In this role, you

will innovate on LLMs, VLMs, autoregressive models, or other large models for

user understanding, content understanding, recommendation, and agentic search.

Your work will lay the foundation for personalizing user experiences, enhancing

engagement and retention, and driving growth within the creator ecosystem.

In search and discovery, you will contribute to the core systems that enable

users to discover and interact with experiences across Roblox. These systems

drive exploration and engagement across all surfaces, helping users find

relevant and exciting content. Looking ahead, our team aims to innovate further

by developing auto-generated summaries, images, and videos from experience

content to improve discoverability and inspire user exploration.

Our mission is to connect a billion users with the best content and connections

at the right time, tackling diverse challenges in advertising, search, and

discovery at an unprecedented scale. Join us and play a pivotal role in shaping

the future of Roblox’s search and discovery.

YOU WILL:

* Design and implement the machine learning solutions that power agentic search

and discovery systems to drive Roblox content distribution.

* Design and implement large scale recommendation models.

* Design and implement LLMs and VLMs for visual understanding and natural

language understanding.

* Balance researching new technologies with a practical approach to integrate

research efforts into the Roblox products.

* Collaborate with other teams within Roblox to make sure we are building

products with a community first approach.

* Communicate with the industry and communities where applicable and be

ambassador for Roblox.

YOU HAVE:

* You have 7+ (for principal) or 4+ (for senior) years of experience designing

and building scalable machine learning solutions. Experienced with

transformer based model training, inference, and product integration. Break

down product requirements into iterative deliverable stages.

* You have a BS, MS, or PhD in Computer Science or a related discipline or

equivalent experience.

* You have initiated and facilitated challenging technical decisions across

multiple teams and organizations.

* While deeply technical, you always start with the needs of the user, whether

they are Roblox users or internal engineers.

* A creative and strategic approach to solving hard problems. You simplify the

complex. You bring in fresh ideas from new places.

For roles that are based at our headquarters in San Mateo, CA: The starting base

pay for this position is as shown below. The actual base pay is dependent upon a

variety of job-related factors such as professional background, training, work

experience, location, business needs and market demand. Therefore, in some

circumstances, the actual salary could fall outside of this expected range. This

pay range is subject to change and may be modified in the future. All full-time

employees are also eligible for equity compensation and for benefits as

described on this page [https://careers.roblox.com/total-rewards].

Annual Salary Range

$278,530—$345,040 USD

Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday,

with optional presence on Monday and Friday (unless otherwise noted).

Roblox provides equal employment opportunities to all employees and applicants

for employment and prohibits discrimination and harassment of any type without

regard to race, color, religion, age, sex, national origin, disability status,

genetics, protected veteran status, sexual orientation, gender identity or

expression, or any other characteristic protected by federal, state or local

laws. Roblox also provides reasonable accommodations to candidates with

qualifying disabilities or religious beliefs during the recruiting process.

For US based roles only, please note the Company may not be able to employ

candidates for this role who have United States work authorization related to

certain U.S. visa categories, or support future H-1B sponsorship at this time.