Justworks recently closed a $40 million round of funding, and the human resources software platform is looking to expand its technology offering. The company's Founder and CEO Isaac Oates explains how Justworks plans to use this new funding for expansion.

"We are starting to think about new kinds of products that our customers are asking for," says Oates. "They talk about things like expense reports, different kinds of insurance."

Oates says he sees the biggest market opportunity in new cities Justworks is available in that include Dallas, Washington, D.C. and Los Angeles.