Simon is the creator of the C4 model for visualising software architecture and Structurizr - the original developer-friendly "models as code" tooling for creating version-controlled documentation. He is the author of The C4 Model (O'Reilly) and Software Architecture for Developers (Leanpub). Over the past 15+ years, Simon has worked with hundreds of organisations across ~40 countries, from startups to global household names in almost every industry sector, helping teams adopt the C4 model and communicate their software architecture more effectively.