Are you one of over 240 million subscribers of Amazon's Prime Video service? If so, you might be surprised to learn that much of the infrastructure behind Prime Video is built using Rust. They use a single codebase for media players, game consoles, and tablets. In this episode, we sit down with Alexandru Ene, a Principal Engineer at Amazon, to discuss how Rust is used at Prime Video, the challenges they face in building a global streaming service, and the benefits of using Rust for their backend systems.

About Prime Video
Prime Video is a streaming service offered by Amazon that provides a wide range of movies, TV shows, and original content to its subscribers. With over 240 million subscribers worldwide, Prime Video is one of the largest streaming platforms in the world. In addition to its vast content library, Prime Video also offers features such as offline viewing, 4K streaming, and support for multiple devices. On the backend, Prime Video relies on a variety of technologies to deliver its content, including Rust, which is used for building high-performance and reliable systems that can handle the demands of a global audience.
About Alexandru Ene
Alexandru worked on the transition of Prime Video's user interface from JavaScript to Rust. He has been with Amazon for over 8 years and previously worked at companies like Ubisoft and EA. He has a background in computer science and is an active open source maintainer. Alexandru lives in London.
Links From The Episode

• Ferris Makes Emulators Ep.001 - The Journey Begins - First episode of a famous series where Jake Taylor wrote a Nintendo 64 emulator in Rust from scratch
• CMake - Very common build system used in C++ applications
• Conan - C++ Package Manager community project
• C++ Smart Pointers - Still a footgun
• Herb Sutter: The Free Lunch Is Over - The seminal 2005 paper that highlights the importance of concurrency, well past C++'s mainstream adoption
• Rust in Production: cURL - Baseline library used everywhere, written in C, but performant and safe
• Prime Video Platforms - One app runs on all of these
• WebAssembly (WASM) - Enabling Rust code with good performance that you can still download and run like JavaScript, avoiding the need for firmware updates on some devices
• Entity Component System - Used in the UI Rust code for pages in the app
• Bevy - Game engine written in Rust
• Leptos - UI framework that makes reactive programming in Rust easier
• tokio - The de facto standard async runtime for Rust
• SIMD - A nice feature set some CPUs support
• WebAssembly Micro Runtime - A tiny WASM runtime well suited for IoT platforms
• WebAssembly Working Group

Official Links

• Amazon Prime Video
• Rust & WASM for UI: Faster Prime Video on ANY Device - Alexandru Ene, QCon San Francisco 2024
• Alexandru Ene on LinkedIn
• Alexandru's Blog
• Alexandru Ene on GitHub