Sherwin John Calleja Tragura is a subject matter expert on Java, ASP .NET MVC, and Python applications with some background in frontend frameworks. He has managed a team of developers to build various applications related to manufacturing and fixed assets, document management, records management, POS, and inventory systems. He has a background in building laboratory information management systems (LIMS) and hybrid mobile applications as a consultant. He has also provided corporate Bootcamp training services since 2010 for courses on Python, Django, Flask, Jakarta EE, C#, ASP .NET MVC, JSF, Java, and some frontend frameworks. He has authored books such as Spring MVC Blueprints and Spring 5 Cookbook and a Packt video, Modern Java Web Applications with Spring Boot 2.x.