What was used to Build FACEBOOK

I knew at one time but forgot, but why does it matter? Yahoo's shopping areas were originally done in LISP but you don't need LISP to make a store front.

I am interested in how facebook allows users to create their own ads and set a budget and what it uses to allow user to customize their profiles. What is the primary languages used for the site?

Quote: I am interested in how facebook allows users to create their own ads and set a budget and what it uses to allow user to customize their profiles. What is the primary languages used for the site?

You can look at the source code of the site.

Thanks,

Ok. What I'm getting at is ... if I wanted to hire someone to build a platform for a social network site with some additional aps what sort of qualifictions would I ask for?

You need to decide first the language / tool and the database ,you are going to use.

Which language and database is recommended?

Quote: Which language and database is recommended?

You can choose from

Php /Mysql
Java/Oracle
.Net/Sql Server

But what is recommended? A lot of applications are being developed on the facebook platform that can also be used in any site. Although I don't expect to duplicate facebook, I would like to know what it takes (what skills) to build a social network platform that syncs with facebook apps.

Sorry if my understanding of all of this is a bit lacking. Trying to learn.

Choose something you are more familiar with.

The most important thing is you should know what exactly you want to do and the limitations of technology.

Facebook has a developer platform so it might be best to look at what they require to interface with their APIs. I repeat though, it doesn't matter what language you use. Parts of the backend might be done in C/C++ but the front end has much more PHP or Java or Python or Ruby or whatever. C/C++ for speed. PHP, etc, for quicker development.