Actually understand it.
Two structured tracks: learn system design with diagrams, MCQs, and challenges β or master DSA patterns with in-browser coding and real test cases.
Caching stores frequently accessed data in fast storage so future requests skip the slow source β cutting latency and reducing DB load at scale.
Most engineers need both. TechCookies covers them together so you don't have to juggle five different resources.
Learn caching, databases, load balancers, queues, and more through structured concept pages with inline architecture diagrams. Then apply everything in real end-to-end system design challenges.
Master algorithmic patterns (two-pointer, sliding window, BFS, dynamic programmingβ¦) with guided concept sections, then practice in-browser with real test cases β no setup needed.
Not just content. A structured path from understanding a concept to using it β whether that's solving a coding problem or designing a real system.
Two free concepts to start. Upgrade to unlock the full curriculum.
6 free patterns to start, covering the foundational techniques every interview tests.
No credit card required. Both tracks included on every plan.
Yes. Caching and load balancing are among the most commonly tested system design concepts. You also get the URL shortener SD challenge, practice tests, and full notes/flashcard functionality.
94 SD concepts Β· 51 challenges Β· 17 DSA patterns Β· 12 practice problems. Free to start.