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The company includes a growing network of individual communities that are all dedicated to providing knowledge in each of their respective fields.

It is a Q&A-based company, which means if you have a question on a specific topic, you can get that question answered by using StackExchange.

You can also use it without any sort of registration and still have full access to the Q&A archive.

Free lunch, a pet-friendly work space and 20 vacation days are just some of the perks the company provides.

If you are in between jobs, you can attend Tuesday's job fair at the Ellie Caulkins Opera House from 6 to 9 p.m. Twenty companies and about 100 new jobs will be up for grabs.

StackExchange is one of the many companies that will be in attendance.For more information, you can go to www.startupdenver.com.

Nate Chisholm contributed to this report.