Principal Core Systems Software Engineer – Game Engine (C++)

Roblox; San Mateo (CA); On-site; USD 294,000 - 343,000; Full time

Job summary

Roblox is seeking a Principal Core Systems Software Engineer for the Game Engine (C++) to lead systems that power a global multiplayer platform.

You will tackle scale, latency, and throughput challenges across assets, networking, and rendering, collaborating with engineers across Roblox's engine teams to deliver real-time experiences for millions of users.

Qualifications

• Led engineers with 8+ years of industry experience.
• Experience solving scale, latency, and throughput in client/server environments.
• Worked on large, multithreaded distributed systems connecting millions of users.

Responsibilities

• Lead engineers on the Engine Networking Team to ensure game state communication.
• Build scalable, low-latency networking for Roblox players.
• Work across gameplay, rendering, and asset loading areas.
• Contribute to safe and civil shared experiences at scale.
• Improve real-time communication of every part of Roblox.

Skills

C++

Multithreading

Distributed systems

Game engine

Job description

Short Summary

Principal Core Systems Software Engineer - Game Engine (C++) with Roblox. 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

Key Details

• Position / opportunity: Principal Core Systems Software Engineer - Game Engine (C++)
• Organization: Roblox
• Country / coverage: United States
• Location: San Mateo, CA, United States
• Work arrangement: On-site
• Opportunity type: Jobs
• Sector: Information Technology
• Compensation: Not specified
• Duration: Not specified
• Start date: 2025-12-08
• Application deadline: Not specified

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. The Engine Networking Team pulls the players together by ensuring the communication of the game state to all. As a Principal Engineer on this team you will help the players experience the game as a nearly synchronous world. The networking and asset loading team plays a key role in a smooth experience for the players. You will work in all areas of the game platform in your quest for real-time communication of every part of Roblox. You Will: Lead engineers with 8+ years of industry experience Understand the game networking with a passion for working with open source Be experienced with asset loading, rendering, and networking coming from a Game Engine/Studio. (Desirable) Be an amazing systems-level C++ programmer and be fascinated by the actual work the CPU does when you use smart pointers, templates, virtual functions, and blocks of memory, both structured and raw Have a keen to each millisecond of the network exchanges: You know where the time goes and how to reduce the waste Understand what happens on the operating system level when certain code is completed You Have: Worked on the guts of a multi-player game engine, solving problems related to scale, performance, latency, and throughput in client/server environments. Worked on a very large multithreaded distributed system that connects millions of users worldwide. Worked on the devices Roblox supports - from desktop clients to mobile phone clients to console clients 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 $293,800 - $343,340 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.

Responsibilities

• 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.
• The Engine Networking Team pulls the players together by ensuring the communication of the game state to all.

Requirements / Eligibility

• mance, latency, and throughput in client/server environments.
• Worked on a very large multithreaded distributed system that connects millions of users worldwide.
• Worked on the devices Roblox supports - from desktop clients to mobile phone clients to console clients 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.