Kristiyan Velkov is a principal front-end developer, Docker Captain, and author of four technical books. He has more than 100 certificates. With over ten years of experience, he specializes in React.js, Next.js, DevOps for front-end engineers, and building secure, high-performance web applications. Kristiyan has contributed to the official Docker documentation and regularly shares practical insights on Medium, where thousands of developers follow his work.