If you've recently updated your LinkedIn profile, there's a good chance your boss knows you might be looking for work elsewhere, news.com.au reports.
Their spy is hiQ, a San Francisco-based company which collects and analyses data from LinkedIn profiles to predict whether employees polishing their resumes are a "flight risk".
hiQ, which was acquired by Microsoft last year, is currently suing the professional networking site in a pre-emptive lawsuit to determine whether it is legal to hoover up publicly viewable information, The Wall Street Journal reported.
The company has been operating since 2012, and currently analyses about 175,000 profiles out of the 500 million-member network. It says it excludes profiles that require a LinkedIn account to view.
Its "retention platform", which hiQ says is "incredibly accurate", scours the web for "any publicly available information about a company's employees and then its data science engine extracts strong signals from that noise that indicate someone may be a flight risk."