Jobs in the United States

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Added 2 mins ago
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Gas to Power Engineering Design Manager
AECOM
Houston, TX
- $190,000 to $240,000 USD / year
…of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and…
Added 2 mins ago
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Construction Program Management Director
AECOM
New York, NY
- $285,000 to $330,000 USD / year
…of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and…
Added 2 mins ago
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Senior Scientist II / Principal Research Scientist I - Analytical R&D
AbbVie
North Chicago, IL
- $124,500 to $236,500 USD / year
…analytical scientists to frame high-value scientific questions, engineer and integrate complex analytical data, and develop fit-for-purpose models, visualizations, and digital solutions…
Added 3 mins ago
Electrical Engineer
Hitachi Global
South Boston, VA
Bring your expertise in electrical design to Hitachi Energy and help power the future of North America. As a Senior Electrical Design Engineer, you will join a highly specialized team…
Added 3 mins ago
Controls Design Engineer
Hitachi Global
South Boston, VA · Raleigh, NC
Hitachi Energy. is seeking a skilled Controls Design Engineer to design, develop, and implement advanced controls and monitoring panels for Power transformers, ensuring optimal performance…
Added 3 mins ago
IG
Product Engineer
Insight Global
San Jose, CA
- $190,000 to $215,000 USD / year
Strong PCB/board-level troubleshooting and root-cause analysis across analog, digital, or mixed-signal circuitry
Added 7 mins ago
Senior Principal Quality Engineer
Long Wave Inc.
Remote, United States
Long Wave Inc. is seeking a Senior Principal Quality Engineer – Program Quality Assurance (PRQA) to support program execution, contractual quality compliance, and Quality Management System…
Added 9 mins ago
ST
Test & Characterization Senior Engineer
SkyWater Technology Foundry, Inc.
Bloomington, MN
- $79,440 to $119,160 USD / year
Test Development: Collaborate with the design and product engineering teams to develop test methodologies and test plans for CMOS devices, SRAM, and analog/digital products.
Added 10 mins ago
Test Engineer
BAE Systems
Rockville, MD
Job Description BAE Systems is seeking a Test Engineer to support our work as a prime contractor on a high-profile U.S. Navy weapon system. Accuracy, integrity, subject matter expertise,…
Added 10 mins ago
Senior Engineer, Unified Communications & Collaboration
ACE American Insurance Company
Jersey City, NJ · Philadelphia, PA
We are seeking a Senior Engineer to join our Global Unified Communications and Collaboration (UCC) chapter, where you will help shape the platforms and integrations that power how Chubb’s…
Added 11 mins ago
AWS Cloud Security Engineer
Vertical Relevance
Remote, United States
Vertical Relevance is looking for an AWS Cloud Security Engineer to join our team as a full-time employee in New York Metro area and be available for Hybrid work. This person is responsible…
Added 13 mins ago
WW
Electrician
Williams, White & Company
Moline, IL
- $15 to $37.75 USD / hour
…operations span 150,000 square feet, offering the unique ability to engineer, design and manufacture the largest in hydraulic press and industrial dryer…
Added 13 mins ago
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Software Engineer Intern
PatientPoint - Invite Only
Remote, United States
- $23 to $25 USD / hour
Join PatientPoint to be part of a dynamic team committed to empower better health. As a leading digital health company, we innovate to positively impact patient behaviors. Our…
Added 15 mins ago
Engineer, AD/ADAS Vehicle Integration
Mercedes-Benz
Atlanta, GA
Here at MBRDNA, you create digital ecosystems around cars, you design a language between humans and machines, you make a car even more intelligent - you make the new reality for cars.…
Added 15 mins ago
Sr Frontend Engineer (AI Experiences), Retail and Marcom Engineering
Apple
Sunnyvale, CA
We are hiring a Senior Frontend Engineer to build the AI-powered tools our marketing and creative teams use every day, and the AI foundations that change how our engineers ship. You will…
Added 15 mins ago
Engineer, AD/ADAS Vehicle Integration
Mercedes-Benz
Atlanta, GA
Here at MBRDNA, you create digital ecosystems around cars, you design a language between humans and machines, you make a car even more intelligent - you make the new reality for cars.…
Added 17 mins ago
BIM Coordinator
Tetra Tech, Inc
San Diego, CA
…workflows to enhance project efficiency, coordination, and overall design…
Added 17 mins ago
BIM Coordinator
Tetra Tech, Inc
Folsom, CA
…workflows to enhance project efficiency, coordination, and overall design…
Added 17 mins ago
BIM Coordinator
Tetra Tech, Inc
Los Angeles, CA
…workflows to enhance project efficiency, coordination, and overall design…
Added 17 mins ago
BIM Coordinator
Tetra Tech, Inc
Austin, TX
…workflows to enhance project efficiency, coordination, and overall design…
Added 18 mins ago
Associate Software Engineer
Priceline.com LLC
NY
…travel applications. We constantly explore new technologies and engineer better solutions for ever demanding user…
Added 18 mins ago
Senior Underground Transmission Line Engineer 2 - Grid
Sargent & Lundy
Lake Mary, FL
…may use data, automation, artificial intelligence, and other digital tools to support research, analysis, engineering and design activities, workflow improvement, or other aspects of their…
Added 18 mins ago
Senior Transmission Line Engineer 1 - Grid
Sargent & Lundy
Tampa, FL
…may use data, automation, artificial intelligence, and other digital tools to support research, analysis, engineering and design activities, workflow improvement, or other aspects of their…
Added 18 mins ago
Lead Substation Engineer 1 - Grid
Sargent & Lundy
United States
…may use data, automation, artificial intelligence, and other digital tools to support research, analysis, engineering and design activities, workflow improvement, or other aspects of their…
Added 18 mins ago
Senior Mechanical Engineer 1 - Energy & Industrial
Sargent & Lundy
Englewood, CO
…may use data, automation, artificial intelligence, and other digital tools to support research, analysis, engineering and design activities, workflow improvement, or other aspects of their…

Roblox

Principal Machine Learning Engineer - Matchmaking

San Mateo, CA, United States

$295,250 - $345,040 USD

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Job details

Pay: $295,250 - $345,040 USD
Experience: 8+ years of experience and a consistent record of delivering and improving large-scale ML systems for ranking, recommendation, personalization, or resource allocation.
Posting language: English
Posted: Nov 3, 2026

Original job description

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.

Matchmaking is a critical stage downstream of Discovery and Search. Once a player chooses a game to play, matchmaking assigns them to a server for that game. That decision shapes who they play with, the network latency they experience, and the quality of their session. By matching players to servers that fit their needs and each developer’s game, matchmaking helps turn discovery into satisfying play, repeat visits, and long-term engagement, making it a direct lever for Roblox’s growth.

As a Principal ML Engineer on Matchmaking, you’ll own the technical vision and execution for the models, objective functions, and algorithms that make those decisions. You’ll combine predictions of high-value player actions with optimization of player and developer utility and system efficiency, serving millions of players across hundreds of thousands of servers in global datacenters.

You Will:

Own the technical direction and ML strategy for matchmaking, connecting the Discovery and Search journey to server placements that improve player experience, developer success, and Roblox growth.
Define and evolve the matchmaking objective function to balance player and developer utility with system efficiency. Make tradeoffs among co-player compatibility, network and join latency, engagement, retention, server utilization, and compute cost explicit and measurable.
Build models that predict high-value actions and longer-term outcomes for each player–server match, including co-play, chat engagement, sustained play, and return visits, using player history, game characteristics, and live server state.
Design and productionize candidate-server retrieval, ranking, and assignment algorithms that optimize this objective under real-time latency, capacity, and reliability constraints, accounting for both the joining player and players already in the server.
Lead other engineers by example and through technical direction as an individual contributor, mentor engineers, and create an engineering culture of excellence.
Build and evolve the data, feature, training, serving, and evaluation systems that support matchmaking ML, ensuring fresh signals, reliable predictions, and consistency between training and serving.
Partner with Discovery, Search, developer-facing product teams, modelers, and data and AI infrastructure engineers to co-design models and systems that adapt to each game’s needs and deliver value across the player journey.
Define offline evaluation and lead online experiments to measure the impact of matchmaking decisions on player engagement and retention, developer success, and system efficiency, using the results to improve models and objectives.
Translate research into iterative production improvements, collaborate with the wider ML community where applicable, and represent Roblox’s technical work.

You Have:

8+ years of experience and a consistent record of delivering and improving large-scale ML systems for ranking, recommendation, personalization, or resource allocation.
Experience defining objective functions, building predictive models, and deploying optimization algorithms that balance user and business outcomes with production latency, reliability, and resource constraints.
The capability of breaking down long-term product requirements into iterative deliverable stages.
Initiated and facilitated challenging technical decisions across multiple teams and organizations. You are empathetic and find common understanding.
Deep technical expertise, you always start with the needs of the user, whether they are Roblox users or internal engineers.
A generalist approach and you have mastered several languages and technologies already; you can easily adapt to any situation.
The ability to roll up your sleeves to tackle data problems or machine learning problems when they come up.
A creative and strategic approach to solving hard problems. You simplify the complex. You bring in fresh ideas from new places.
BS in Computer Science or a related discipline, MS/PhD are a definite plus.

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.

Annual Salary Range

$295,250 - $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.

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Skills

Machine learning
ML
Grading systems
Research
Build predictive models
Product comprehension
Computer science

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