  LinkedIn Talent Solutions business contributes to around 65% of LinkedIn's
annual revenue, and provides tools for job providers to reach out to potential
candidates and for job seekers to find suitable career opportunities.
LinkedIn's job ecosystem has been designed as a platform to connect job
providers and job seekers, and to serve as a marketplace for efficient matching
between potential candidates and job openings. A key mechanism to help achieve
these goals is the LinkedIn Recruiter product, which enables recruiters to
search for relevant candidates and obtain candidate recommendations for their
job postings. In this work, we highlight a set of unique information retrieval,
system, and modeling challenges associated with talent search and
recommendation systems.
