As a Developer, One of the best thing is to be sure of the power of whatever technology you use.

I’v come across alot but this seem to be the ones i’m getting my hands dirty on, Still Learning though, I’ve got a big view of how they all work and when/where they’r need…

Server-Side/Backend : Java EE (JPA, EJB), Django Framework
Client-Side/User Interface : Servlets, GWT/JSF, Angular JS or other Javascript Frameworks
Databases: MySQL, SQLite, NoSQL (MongoDB)
Linux System Administration : Python and Shell Commands

I am TimTech4u