Pieter Greyling is a highly experienced software engineer and developer advocate with a passion for programming and open-source computing. He started his career working with programmable calculators and went on to work with a wide range of programming languages, platforms, and technologies, including Java, Python, JavaScript, C#, Android, iOS, Mac OS X, Linux, COBOL, and more. He has held various roles throughout his career, including Senior Developer Advocate at Huawei and Google, IT Architect Expert at Experian, and Lead Software Developer at CitiGroup Global Markets Deutschland, among others. Pieter is also the author of an Android programming book and a co-founder of a startup. He has a Microsoft Certified Professional certification, and he studied at Birkbeck, University of London. Pieter's expertise includes software engineering, programming, technical architecture, project management, and systems analysis.