Discover three key strategies for creating robust Native Implemented Functions (NIFs) in this ElixirConf EU 2023 talk by Susumu Yamazaki. Learn how to effectively handle uncertain function return values, implement error handling following general conventions, and utilize assertions for specifying implicit preconditions. Explore techniques for improving performance while maintaining robustness and fault tolerance, and gain insights into building NIFs for multiple platforms. The presentation covers an introduction, motivation, three essential tips, and concludes with a comprehensive summary, providing valuable knowledge for Elixir developers looking to enhance their NIF implementation skills.