HashLearn is a platform that leverages spaced repetition and plain-text learning materials to help developers master complex technical concepts. Inspired by Hashcards, it focuses on efficient knowledge retention for programming languages, algorithms, and system design. Users can create, share, and study flashcards in a simple text format, with the platform intelligently scheduling reviews to maximize long-term recall. This addresses the challenge of keeping up with rapidly evolving tech stacks and the need for deep understanding of foundational principles.