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Home
Six hubs under one roof: System Design, DSA Patterns, Programming Languages, Design Patterns, Software Architecture and Developers Den.
Shipped product · Live at learn.localninja.ca
NinjaLearn
A browser-based platform for mastering software engineering by doing instead of reading. Every system-design and algorithm topic is a running simulation: crash servers, inject network partitions, flood rate limiters, race two pointers - and watch what happens. Six hubs, 122 interactive modules.
RoleFull-stack developer
StackReact · TypeScript · pure client-side simulation engines with zero runtime dependencies
Scale6 hubs · 122 modules · 41 live system-design simulators with failure injection and auto-traffic
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System design hub
42 modules across 13 categories, connected by a pannable, zoomable mind map of 52 prerequisite links.
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Caching simulator
A live module: turn on auto-traffic, watch hit rates, then kill a cache node and see the system respond in real time.
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DSA patterns
Algorithms you can step through - two pointers, sliding windows, graph traversals - with the state drawn as it changes.
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Developers Den
The hub for tooling, workflows and the practical side of shipping software.
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All hubs
Progress across every hub at a glance - each one a set of simulations rather than pages of text.
