James Cullimore

James Cullimore is a freelance software developer, consultant, speaker, and instructor with over 10 years of experience building software for startups, enterprises, and global brands. While best known for his work in Android and Kotlin development, his experience spans mobile, web, backend, cloud, and embedded systems across industries including healthcare, finance, automotive, logistics, and defense. James is a regular conference speaker, technical writer, open source contributor, and community advocate who enjoys helping developers solve real-world problems through practical, hands-on learning. He has created and contributed to numerous applications used by thousands of users, as well as several open source projects and developer resources. Passionate about education, James focuses on turning complex technical topics into clear, actionable lessons that developers can immediately apply in their own projects. When not coding, teaching, or speaking, he enjoys spending time with his wife and two children, following combat sports, and exploring new technologies.