ScaleDojo

ScaleDojo is an interactive platform for practicing system design interviews and skills, offering 220+ hands-on labs covering high-level design (HLD), low-level design (LLD), API design, and GenAI/RAG system design. Unlike static tutorials or video courses, ScaleDojo focuses on applied, lab-based practice so engineers can build real design intuition rather than memorize patterns. It’s especially useful for engineers preparing for system design interviews at top tech companies, with a growing focus on emerging GenAI and RAG architecture challenges that most competing platforms don’t cover in depth.