Brian Leung possesses expertise in machine learning, information retrieval, python. Colleagues describe him as "Brian is an excellent engineering manager, leader and CTO. He has a knack for getting the best work from the people who report to him while fostering a collaborative culture that makes coming to work a joy. I was most impressed with the ease in which he balanced business and technical constraints in strategic discussions, bringing clarity to otherwise difficult decisions. This made my job (as a PM) fairly easy. Brian seamlessly shifts between the high-gear of a 10x engineer and that of an organized, patient and empathetic manager. I would be excited by the opportunity to work with Brian again." and "Brian does three things superbly in his role at Sugar. First and foremost, he is a fantastic and diverse programmer. Every sprint, Brian saves the toughest tasks for himself and without fail executes them to engineering perfection. He seems to have a boundless knowledge of all imaginable engineering topics -- from designing a machine-learning loop to optimizing site performance on both the front and back ends. Brian is an invaluable engineering resource to his team and to Sugar. Secondly, Brian redefines excellence as the leader of the engineering effort of Circle of Moms. He genuinely cares about his team members and goes out of his way to develop each of us into the best engineers we can be. I am personally very appreciative of the effort that Brian has made to assign me tasks that expose me to new and interesting engineering concepts which, in sum, have turned me into a more productive and knowledgeable developer. Finally, Brian is an innovator at heart. Under his leadership, we have A/B tested everything from button colors to the delay on a lightbox. This quality has yielded significant results for Circle of Moms -- as search traffic more than doubled in the last six months of 2011 and doubled again in the first five months of 2012."