Reqflow teaches engineering by running things, not by reading about them. Pick the track that matches the role you're going for - or skim all three, they overlap more than they look.
Trace requests through real architectures - WhatsApp, Netflix, Uber - with live simulation and failure scenarios.
For
FAANG-tier interviews, senior-level architecture work, anyone who learns by running things.
The role behind customer-facing AI work - prototyping in 48 hours, deploying into customer environments, productionizing custom work.
For
Engineers at AI infra companies, anyone interviewing for an FDE/applied-AI role, generalists who want to ship customer software fast.
15 algorithm visualizers — sorting, searching, trees, BFS/DFS, BST — with step-by-step animations, code panels, spaced repetition quizzes, and side-by-side comparison.
For
Interview prep, refreshing fundamentals, anyone who learns better from running animations than static diagrams.
Why three tracks
System Design teaches you to reason about architecture at scale. FDE teaches you to ship software inside someone else's constraints. DSA teaches you the primitives both of the others assume. Most engineers need pieces of all three - Reqflow is just honest about treating them as different skills rather than one big bucket of "interview prep."