Konstantin Pupkov is a software engineer, entrepreneur, and open source contributor. He has worked in the IT industry for more than 20 years. In 2005, Sun Microsystems awarded him special recognition in Moscow for a Java-based document-flow project. He has worked for companies in the insurance, cybersecurity, finance, telecommunications, logistics, and retail sectors, primarily within the Java ecosystem. Over the past several years, he has worked extensively with Rust and found it a fascinating and compelling language. This book draws on his decades of experience in the IT industry.