May 2018 – Apr 2022 · 3 yrs 11 mos

• Lead a group (~20 members) of machine learning engineers, software developers, and data scientists on Microsoft Ads Platform team, develop and innovate ads products to improve advertisers' experience and ROI with Microsoft and grow ads business
• Embed AI and ML algorithms and models into Microsoft Ads products, automate advertising tasks including ads generation, keywords generation, targeting recommendation, etc. to bring intelligence to customers and enable them to grow with Microsoft Ads
• Innovate new products (Digital Marketing Center) to provide one-stop experience to customers to efficiently manage social media, paid search, and social advertising across multiple channels. It has been a critical part to grow business, currently lead the internationalization efforts to extend them from US to global markets
• Design and develop A/B testing framework to support A/B testing experiments and data analysis across Ads Platform team, transfer the team's culture to be data-driven decision making, drive the team to make decision in a more scientific and efficient way and make the impact measurable

Sep 2014 – Apr 2018 · 3 yrs 7 mos

• Build up the BingAds Campaign Platform China Team from scratch to 40+ engineering team with top performing talents, lead the team to close feature gap with Google and grow demand by 20+% YoY to support sustainable ads revenue growth
• Significantly improved Campaign Platform infrastructure, which enabled the team to quickly release many new functionalities like dynamic search ads, price extension, hotel ads, Google sync, etc. to reach Google parity in all major features. Re-architect AdInsight serving platform from SQL to NoSQL which has 10x perf and scalability improvement
• Build deep understanding on advertisers, identify system bottlenecks and customer's pain points during advertiser journey, mine the insight behind customer behavior and guide the feature teams to continue to improve Bing Ads
• Instill core values to the team, including integrity, accountability, innovation, persistence, teamwork, attention to details, and customer focus. Drive engineering excellence to significantly improve product quality and shipping agility from weekly to daily

Mar 2013 – Aug 2014 · 1 yr 5 mos

• Worked on multiple projects across different search Ads areas from 2012 as a software development engineer, later as a development lead.
• 1. Working on Ads Relevance team, re-architected the data refreshing pipeline to reduce the refreshing time from every 3+ weeks to daily, later further reduced it to 5 hours by enabling incremental refreshing. Applied various techniques to improve relevance model to reduce search ads defect rate.
• 2. Working on Ads IndexGen team as the tech lead to design and build the Generic Publishing Platform to onboard all RnR offline pipelines (RC2, MSM, Nena, etc.) which significantly reduced the cost of onboarding and maintaining pipelines.
• 3. Working on Ads Selection team, identified/fixed platform capability issue and free-up ~40% memory, led the team to successfully reduce the platform latency by 30% and apply various techniques to improve RPS(revenue per search)

Apr 2009 – Feb 2013 · 3 yrs 10 mos

• Working on Bing Core Ranking team, delivered various techniques(such as click stream, anchor stream, L3 reranking, backoff models, other training techniques, etc.) to help Bing to beat Google on search relevance, and has delivered L3 re-ranking infrastructure for Core Search to further improve relevance