David Yan is a Software Engineer at Google at Google. He possess expertise in distributed systems, cloud computing, java, scalability, c++ and 13 more skills. Colleagues describe him as "I have known David since April 2010 as we were colleagues at Six Waves. I worked with David closely in my capacity as Director, Online Marketing, to develop a Facebook Advertising API for managing, reporting, and optimizing ad campaigns. I used to call David “superman” and “headmaster” – Things are always in good place under his supervision. He is super-efficient, very knowledgeable, never hesitate to do what is righteous and willing to help others, and a great team leader. David spent only 1 month to develop the FB Ad API, much faster than other FB Ad API vendors which took 6 – 12 months with a whole team to finish! His API product helps us to save campaign management time and optimize campaign performance tremendously. It was my great pleasure to work with him. He is definitely a hard-to-find asset to any company!", "I have worked with David at 6 Waves for a year and I have learned to appreciate his human and professional qualities. David is simply a very smart and honest guy, always ready to go off his way to help someone. Easy going but also someone you can count on in any circumstances. Professionally, David shows a very rare mixture of deep strategic and analytical thinking with a genuine desire to achieve concrete results and manage projects hand-on if necessary. For this reason, David is a strong asset for a company on both the short and long term as he can take in charge and lead complex projects from scratch but also take technical strategic directions.", and "David is one of the best engineers I ever worked with. He is very strong in technical areas and was the foremost expert on web within Yahoo!. He was the go to guy and the technical lead for back end of Yahoo! Finance. He along with two others formed the core team that setup worldwide Yahoo! Finance content/web services architecture. He mentored a team of engineers who went on to become stars within Yahoo! Finance, while instrumenting the next generation of Yahoo! Finance (21 sites in total). He is very good in handling communication and was never afraid to raise an issue. He was very well respected and had a stature far beyond his years of experience. He cared a lot for Yahoo! users, worked very hard and strived for excellence. It is rare to get to work with someone of his calibre, I would hire him again in a minute."