Apr 2021 – Mar 2024 · 2 yrs 11 mos · United States · Remote

• Technical lead of the Liquidity Management team in the crypto org. My team directly interacts with the Bitcoin and Ethereum to manage all of the company's digital currencies on the blockchains, trading off between security, availability, and cost-efficiency.

Oct 2016 – Apr 2021 · 4 yrs 6 mos · Seattle, Washington

• Technical lead of the Cloud Billing Cost Reports team.
• The team is responsible for collecting billing data from upstream sources, and serving it to end users in various forms. Our product area involves full stack development, including web UI, API (public and internal), distributed database, data processing pipeline.

Jan 2011 – Oct 2016 · 5 yrs 9 mos · Redmond WA

• In Anti-Abuse team, I worked with partner teams such as Outlook.com, One Drive and Messenger and wrote data mining and machine learning algorithms to classify malicious users and activities. Algorithms are implemented to consume massive data and run on map reduce platform (Cosmos).
• I was also responsible for building pipelines and web services that expose results of the algorithms to partner services in real time, such as Microsoft account sign in, sign up and email service.
• In Intelligence Services team, I worked on a full stack position to build a platform that helps people schedule and execute jobs on Azure and Cosmos, exposed as ASP.NET website and used by various disciplines like engineers, data scientists, researchers, etc.

May 2010 – Aug 2010 · 3 mos · Redmond WA

• I worked on improving an abuse detection algorithms which runs regularly on TBs of logs to detect malicious user activity using IP Geo-Location; I was able to refine the algorithm in terms of both accuracy and speed, and visualized my result on an interactive Bing map application.