As a front-end developer, you're at the top of your game — immersed in the latest releases and honing your skills. But in the fast-paced world of HMI development, the back-end might feel like someone else's concern. Think again! This paper reveals why understanding functional safety is crucial, even for those focused solely on the user interface. Discover how your work impacts safety-critical systems across industries like aviation and healthcare, and why compliance with safety standards is vital to prevent potential harm. Are you ready to expand your expertise and embrace the bigger picture?