I've been blogging since 2013 about Java, JPA, Hibernate, Spring, SQL, and database systems (e.g. Oracle, SQL Server, PostgreSQL, MySQL).
I wrote and published a book called High-Performance Java Persistence which has been read by thousands of Java developers all across the world.
I've been publishing a several video courses based on my High-Performance Java Persistence training material which you are going to love.
If you are interested in having me teach you how to get the most out of your data access layer, then you should definitely contact me.
If you are interested in having me reviewing and optimizing your enterprise applications, then you should definitely contact me.
I'm speaking at software conferences about Java Persistence, Hibernate, database systems, and SQL.
I've been answering thousands of questions about Java, JPA, Hibernate, Spring, and SQL on StackOverflow.
Besides open-source projects (e.g. FlexyPool, Hibernate-Types), all the source code on my blog, book, and courses is hosted on GitHub.
With over 250 articles, my Hibernate tutorial is one of the most comprehensive resources about JPA and Hibernate.