Rubin is an AI assistant that aims to improve the candidate and employer experience in recruitment. It uses chatbots to automate parts of the recruitment process, provide screening and assessments of candidates, and generate reports to track progress. The chatbots are trained for specific industries to have personalized conversations with candidates and make well-matched recommendations to employers. Rubin draws on Google's API.AI for its conversational abilities and aims to be available 24/7 to candidates through social media and messaging platforms.