Java ClassLoader system - https://habr.com/ru/articles/748758/ Реквием по «Расскажи, как работает HashMap?» https://habr.com/ru/articles/757510/
Database migration Liquibase best practices https://habr.com/ru/articles/179425/
Hibernate entity lifecycle, propagations https://habr.com/ru/articles/271115/ Cascade types https://javarush.com/quests/lectures/questhibernate.level13.lecture05?ysclid=lvwvwm2uoa703050643
Filter vs Interceptor https://stackoverflow.com/questions/35856454/difference-between-interceptor-and-filter-in-spring-mvc
SAP - https://translated.turbopages.org/proxy_u/en-ru.ru.95af9698-663badb1-2243905b-74722d776562/https/www.geeksforgeeks.org/cap-theorem-in-system-design/, https://habr.com/ru/companies/alfa/articles/812417/