Kristiyan Velkov is a Principal Front-end Developer, Docker Captain, and author of 4 technical books and 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.