Tech Talks Episode 26: The Roblox Engine

In this episode of Tech Talks, CEO David Baszucki sits down with George ElKoura and Taylor Russ to discuss how Roblox is reimagining the engine for a world where anyone can create, and millions can play on any device, instantly. They explore how Roblox is advancing generalized simulation, optimizing performance, moving toward full engine parallelism, and enabling competitive gaming through server authority and predictive streaming. Discover how the Roblox Engine is building the future of real-time, cross-platform reality simulation.

00:00 - Introduction and the early days of the Roblox engine

00:35 - C++ is the happy place 

01:45 - Engine as a reality simulator limited by compute 

05:30 - Specialized memory allocation to optimize across platforms

10:05 - Parallelism and optimizing server capacity 

12:20 - Streaming data 

15:10 - Handling LOD on the platform to enable one build no matter the device 

19:20 - How our orchestrator works to balance resources, speed, and quality 

23:00 - Treating all “digital matter” consistently 

27:20 - Server authority and design goals 

35:26 - Philosophical engine priorities