Twitter's Dorsey: 'We should question' how we hire

Jack Dorsey has built two large companies from the ground up, and he has a message for corporate America.

Hiring practices, which rely heavily on referrals and bonuses that incentivize workers to look within their own networks, "tend to have a natural bias" toward hiring people who are similar to current employees, said Dorsey during a panel at the Grace Hopper Celebration of Women in Computing in Houston on Thursday.

"We should certainly question those," said Dorsey to a mostly female audience at the conference.

Jack Dorsey, CEO of Twitter.
Getty Images

Still, the CEO of Twitter and Square adds he does not have an answer to the problem.

At Square, more than 70 percent of the company reports to three female managers.

Dorsey rallies the Twitter troops, after firing 336
Dorsey rallies the Twitter troops, after firing 336

Dorsey stressed the importance of having employees that reflect a company's customers.

"That's critical but any time you bring together a bunch of different perspectives, creativity ensues," he said.

Read MoreTwitter names Google pro as executive chairman

Overall women represent a fraction of employees in computing. Women make up just 19.8 percent of software developers and 21.4 percent of computer programmers, according to data from the Bureau of Labor Statistics.