The aim of this tutorial is to equip attendees with the knowledge and tools to develop high-performance DSLs and code generators. Lightweight Modular Staging (LMS) is a pragmatic approach to runtime code generation in Scala, and Delite is a compiler framework for embedded DSLs that simplifies the process of implementing DSLs for parallel computation and heterogeneous targets, through a high-level intermediate language of parallel patterns. This tutorial provides an overview of the technology stack, demonstrates use-cases where it has been successfully applied, and guides the attendees step-by-step through the creation of simple generators and DSLs.