Robinhood

Full-time headcount: 1,042
Headquarters: Menlo Park, California
Year founded: 2013
Most common skills: Python, Data Analysis, Java
Largest job functions: Engineering, Finance, Support
What you should know: Robinhood, which bills itself as “investing for everyone,” has sought to democratize stock market investing via its app by making trades affordable and easy to execute. It recently raised $200 million in new funding, making it worth $11.2 billion. It’s now on a hiring spree to keep up with its growth and respond to growing regulatory concerns, bringing on hundreds of registered financial service representatives in Southlake, Texas, and Tempe, Arizona.