Abstract: A system for management of recruitment data may include (a) an interface for receiving and providing over a wide area computer network data regarding job openings and data regarding candidates to be matched to such job openings; (b) a database for storing the data regarding job openings and the data regarding the candidates, the database being organized according to one or more entity-relationship models; and (c) a computing hardware platform for executing a processing engine that is machine-learned from the data regarding job openings and the data regarding candidates, wherein the processing engine (a) creates the entity-relationship models over time; (b) manages the interface to receive the data regarding job openings and the data regarding candidates and causing the received data to be stored in the database; (c) matches candidates whose data are currently in the data base to job openings currently in the database; (d) receives historical data regarding actual filling of job openings in the database by can