Upwork is changing the way businesses find, hire, and pay highly-skilled freelancers for short-term and longer-term projects. As an increasingly connected and independent workforce goes online, knowledge work — similarly to software, shopping and content before it — is shifting online as well. Upwork has built an expansive and unique repository of data on its platform, which, when combined with machine learning capabilities, enables Upwork to best predict the availability, interest, and skill relevance of specific freelancers for specific projects. Once a freelancer is matched with a job, the platform offers collaboration and communication features, time tracking and invoicing, and two-way feedback and review systems to better manage the lifecycle of project engagements.