HackerRank is a technology company that provides a platform for competitive programming challenges and technical skill assessments. The platform offers coding challenges, practice problems, and contests across various programming languages and domains such as algorithms, data structures, artificial intelligence, and more. It serves both individual developers looking to improve their skills and companies seeking to evaluate and recruit technical talent. HackerRank's features include a vast library of coding challenges, real-time code execution and testing, leaderboards, and certifications. For businesses, it provides tools for creating custom coding tests, conducting virtual interviews, and streamlining the technical hiring process. The platform aims to match skilled developers with suitable job opportunities while helping companies identify top technical talent efficiently.