The process took 4 weeks. I interviewed at Two Sigma (Houston, TX) in Dec 2016
Interview
First, I had a phone interview/conversation with HR. Then I took a technical writing test through Hackerrank, followed by an in person interview in Houston, TX. The interview consisted of SQL, basic math, Excel, Python, and UNIX/LINUX. Each interview lasted about an hour, and they take you to lunch in between interviews.