Parag Mallick spent more than 20 years studying the intersection of software engineering and life sciences to better understand predictive and personalized medicine. Then, one weekend, a light bulb went off. The Stanford professor and cancer researcher had a big idea. He needed to start a company. Mallick called his longtime friend Sujal Patel, the veteran Seattle tech entrepreneur who co-founded and sold Isilon Systems to EMC for $2.5 billion in 2010. “It didn’t take me very long to realize Parag was on to something,” Patel said in an interview with GeekWire this week.