As a freelancer, I have been working with Spring Boot and Spring Security for over 17 years. As the founder of Bootify.io, I wrote a tool for creating complex Spring Security setups directly in the browser.
I would be very glad to share my in-depth knowledge for specific Spring Boot and Spring Security challenges. If you are in need of a freelancer / Freiberufler with a hands-on mentality, please contact me. In case I'm not available, I will be happy to pass on your request to my network.