Michel Graciano is highly familiar with development techniques, such as object- and component-oriented programming, design patterns' applicability, and software analysis. An expert in application development with open source software, he is currently working as an instructor at Código Efetivo, a training company in Brazil.

He is actively involved with open source projects, such as NetBeans, and has delivered talks at JustJava, The Developer's Conference, and JavaOne conferences.

His longtime contributions to NetBeans started with the Portuguese translation project and continued through his participation in the NetFIX and NetCAT programs, leading to him becoming a NetBeans Dream Team member.

Halil Karaköse is a freelance software architect who graduated from Işik University Computer Engineering Department in 2005.

He worked in the telecommunications industry as a software developer and software architect for 10 years, including companies such as Turkcell and Ericsson. In 2014, he quit Ericsson to establish his own software consultancy company, kodfarki.com.

He has keen interest in Java tools, which speed up development, such as NetBeans and Intellij IDEA. He loves mouseless driven development.

Mario Pérez Madueño graduated in computer engineering from the Open University of Catalonia (UOC), Spain, in 2010. He is an early adopter of Java tech and advocates agile development methodologies. He has been a member of the NetBeans Community Acceptance Testing (NetCAT) program for many years. He has also contributed as a technical reviewer to Building SOA-Based Composite Applications Using NetBeans IDE 6 and Java EE 7 Development with NetBeans 8, both by Packt Publishing.