Ivan Leichtling leads an amazing team of engineers focused on securing Yelp's visitors, mobile apps, websites, employees, and infrastructure. Ivan holds a BS in Computer Science from the Columbia University School of Engineering and Applied Sciences. Prior to Yelp, Ivan spent a dozen years writing software, building hardware, and leading teams at Microsoft. Ivan is an anagram of vain and as such appreciates Twitter followers at @c0wl and @YelpEngineering.