Harishankaran K and Vivek Ravishankar, 

Coders are at the heart of disruption, but there’s a glitch: How are they to be hired? Many brilliant coders are self-taught and don’t have the qualifications to match conventional job descriptions. Moreover, think about the time spent on hiring. With HackerRank, which has a million-strong developer community, companies can start by posting coding puzzles, and hire those who come up with the best solution. Harishankaran (in photo), who has the reputation of being an ambidextrous table tennis wunderkind, works on the product in Bengaluru, while co-founder and CEO Vivek Ravisankar sits in San Francisco. They claim HackerRank has grown 400% over the year and raised nearly $20 million so far. Marquee clients include Facebook and Airbnb.