I'm building the search engine at eBay. I'm also an ex-googler from the YouTube Data team.
While at Penn, I worked at Wharton Research Data Services (WRDS) as a research associate. There, I built pipelines for parsing SEC filings into sectionized plain text.
at least a year: Canada, US, and China.
almost a month: Japan and UK.
more than a week: Germany and India.
less than a day: Qatar and Switzerland.
My full writings in Chinese: https://www.jianshu.com/u/b92415bab14d.