Scala.js in production

Unlike simple apps, where technology choices rarely matter, for complex apps, those choices can be crucial in getting the desired maintainability, agility, and performance. Our startup helps students learn Indian Classical Music with a modern approach by offering tools such as a composition editor, music transcriber, and real-time pitch/beat accuracy feedback provider right in the web browser. We love Scala and use it for backend and frontend development. With some effort, we were able to keep the code simple, make development a joyful experience, and extract high performance. In this talk, share our experiences in choosing frontend frameworks, client-server communication, use of WebAssembly for performance critical portions, and so on.