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Added 32 mins ago
BH
Substation Engineer I, II, Senior, Lead or Principal
Black Hills Energy
Pueblo, CO
- $31,533 USD / year
…procedures of electrical engineering.* General knowledge of network design, standards and system operations.* Basic knowledge of Black Hills Energy's support functions, including but not…
Added 32 mins ago
BH
Substation Engineer Senior, Lead or Principal ($10,000 sign-on bonus!)
Black Hills Energy
Golden, CO
- $31,533 USD / year
…procedures of electrical engineering.* General knowledge of network design, standards and system operations.* Basic knowledge of Black Hills Energy's support functions, including but not…
Added 33 mins ago
BH
Substation Engineer Senior, Lead or Principal ($10,000 sign-on bonus!)
Black Hills Energy
Golden, CO
- $31,533 USD / year
…procedures of electrical engineering.* General knowledge of network design, standards and system operations.* Basic knowledge of Black Hills Energy's support functions, including but not…
Added 33 mins ago
BH
Substation Engineer I, II, Senior, Lead or Principal
Black Hills Energy
Pueblo, CO
- $31,533 USD / year
…procedures of electrical engineering.* General knowledge of network design, standards and system operations.* Basic knowledge of Black Hills Energy's support functions, including but not…
Added 42 mins ago
Electronic Warfare DevOps Engineer
Dynetics, Inc
Huntsville, AL
Leidos’ Defense Open Air Sensors Division is seeking an Electronic Warfare DevOps Engineer to join a diverse team to create unique solutions for complex sensor and radar orientated…
Added 47 mins ago
RE
Network Administrator I
Rochester Electronics, LLC
Newburyport, MA
- $63,000 to $85,680 USD / year
Assist and support the Network Engineer with projects, upgrades, maintenance, and troubleshooting.
Added 53 mins ago
Specialist, Systems Engineer - RC-135 Computer Systems Administrator
L3Harris
Offutt Air Force Base, NE
Job Title: Specialist, Systems Engineer - RC-135 Computer Systems Administrator
Added 53 mins ago
Senior End User Engineer
Fiserv
Omaha, NE
The End User Computing Windows Engineer is responsible for providing technical support, maintenance, and optimization for end-user devices and applications, focusing on Windows operating…
Added 1 hour ago
IT
MDE (Cyber, Network & Systems)
Infinity Technology
Colorado Springs, CO
- $140,000 to $165,000 USD / year
The Multi-Disciplinary Engineer (Cyber, Network, & Systems) is responsible for designing, integrating, securing, and sustaining complex information technology environments across systems…
Added 1 hour ago
Senior System Infrastructure Engineer
PC Connection Inc
Shrewsbury, MA
Connection has a fantastic opportunity through our Technical Staffing division for a Sr Infrastructure Engineer. This is a full-time position with benefits.
Added 2 hours ago
Lead Inspection Engineer - AMRT
GE Vernova
Greenville, SC
As a Lead Inspection Engineer within the Advance Manufacturing and Repair Technologies (AMRT) Inspection Team, you will develop and deploy inspection and measurement solutions that support…
Added 2 hours ago
System Administrator
City of New York
New York City, NY
- Troubleshooting and resolving technical issues related to hardware, software, and network connectivity.
Added 2 hours ago
Kiewit Nuclear Solutions-EPC Project Engineer-TN,SC, & ID
Kiewit
Idaho Falls, ID
As an EPC Project Engineer, you will be responsible for the administrative and technical aspects of constructing a project, managing a team of field and office engineers. Do you have strong…
Added 2 hours ago
Senior Network Engineer (DoD TS Clearance)
MartinFederal Consulting, LLC
Huntsville, AL
We are seeking a highly skilled Senior Network Engineer to design, install, configure, and document a standalone Cisco-based network in a dedicated lab environment. The ideal candidate…
Added 2 hours ago
Embedded Software Test Engineer
Leidos
Huntsville, AL
Leidos is seeking a talented Embedded Software Test Engineer to join a multi-disciplinary team within a matrixed organization to create unique solutions for complex problems, specifically…
Added 2 hours ago
Embedded Software Test Engineer
Leidos
Huntsville, AL
Leidos is seeking a talented Embedded Software Test Engineer to join a multi-disciplinary team within a matrixed organization to create unique solutions for complex problems, specifically…
Added 2 hours ago
A
Product Design Engineer
Actalent
Zeeland, MI
- $45 to $55 USD / hour
Job Title: Catia Design Engineer Automotive Plastic ComponentsJob Description
Added 2 hours ago
Network Engineer, Foundation & Support
Meta
Jefferson City, MO
Meta's Edge & Network Services (ENS) team is actively looking for a Network Engineer to help us tackle the unique set of challenges and opportunities we face, while contributing to our…
Added 2 hours ago
Director - Customer Response Engineering
Trellix
Jefferson City, MO
…strategic customers across our endpoint, data security, email, and network products. The role also owns prevention: finding risk in customer environments before it becomes an…
Added 2 hours ago
Infrastructure Product Manager / Technical Program Manager
HTC Global Services Inc
Dearborn, MI
Experience as a Release Train Engineer, Product Manager, Platform Engineer, DevOps Engineer, or in a similar role.
Added 2 hours ago
A
Junior Field Service Engineer
Actalent
Grand Rapids, MI
- $63,000 to $75,000 USD / year
…custom machine manufacturer as an entry-level Field Service Engineer. Ideal candidates are those eager to transition into controls, software, mechanical, or electrical engineering position…
Added 2 hours ago
Network Engineer - Sr. Staff
Lockheed Martin
Colorado Springs, CO
The Network Communications Engineer will design, configure, secure, monitor, and troubleshoot complex, high-performance communication networks supporting mission-critical systems.
Added 2 hours ago
Staff Full Stack Engineer (Infrastructure) - FT telework - EADGE-T
Lockheed Martin
Colorado Springs, CO
EADGE-T is seeking a full stack engineer to join the project team with a focus as an Infrastructure Systems Engineer. In this role, you will:
Added 2 hours ago
Global Head of Infrastructure & Cloud Operations
Janus Henderson Investors
Denver, CO
Own the AI & data platform run-state. Engineer and operate the services behind our Medallion architecture (Snowflake, Azure, DBT) so analytics and AI use-cases scale across the firm.
Added 2 hours ago
K
Nuclear Quality Engineer-Kiewit Nuclear Solutions-Multiple Locations
Kiewit
Denver, CO
- $112,000 to $117,000 USD / year
…culture is strong at Kiewit Nuclear Solutions. As a Quality Engineer, you will report directly to the Quality Manager, and will administer the Project Quality Plan. In this role, you will…

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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More about this job

Skills

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

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