Reqflow teaches engineering by running things, not by reading about them. Pick the track that matches the role you're going for, system design, FDE, or React Native.
The smallest live system on Reqflow. Most people begin here, then branch into FDE or React Native.
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.
Trace taps through JSI and Fabric, watch FlatList virtualize huge lists, and follow offline sync from queue to conflict resolution.
For
Mobile engineers, React Native interview prep, full-stack devs moving to mobile.
Why three tracks
System Design teaches you to reason about architecture at scale. FDE teaches you to ship software inside someone else's constraints. React Native traces mobile architecture the same way: step through taps, lists, and offline flows instead of memorizing bullet points. Reqflow is just honest about treating them as different skills rather than one big bucket of "interview prep."
Prefer a curated order? Open the React Native learning path →