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 Replication Teampulls the players together by ensuring the communication of the game state to all. As a Principal Software Engineer you will help the players experience the game as a nearly synchronous world. Just as the nerves in our bodies coordinate our actions, the network system coordinates all the computers involved into 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 Are:

• A leading engineer with 8+ years of industry experience

• Experienced with Game networking coming from a Game Engine/Studio

• A systems-level C++ programming expert and are fascinated by the actual work the CPU does when you use smart pointers, templates, virtual functions, and blocks of memory, both structured and raw

• Keen on each millisecond of the network exchanges: You know where the time goes and how to reduce the waste.

You Have:

• Deep understanding of how high-performance and low-latency networking solutions for a variety of game genres, e.g., high-fidelity first-person shooters, massive multiplayer online games, are architected and designed. This includes architecting state synchronization, predictive mechanisms, and bandwidth optimization.

• Practical experience with core game networking paradigms, such as client-side prediction and server reconciliation, data serialization and compression (e.g., delta encoding), lag compensation.

• Extensive experience with multi-threaded programming, synchronization primitives, and designing thread-safe networking systems

• Worked on some or all 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.