Why another prep site?
Most prep sites assume you’re starting from scratch. Tech Brushup doesn’t.
The problem with most prep sites
Educative, DesignGurus, Udemy — they’re built for people learning from the ground up. Structured tracks, video tutorials, “from zero to interview ready.” That’s exactly right if you’re new. But if you’ve been writing code for years and have a system design round next week, you don’t need a course. You need your knowledge back.
Who this is for
- You’ve solved these problems before — you just need them sharp again
- You’re prepping in days, not months
- You know what a heap is, you just need the Java API back in your head
How coding patterns work here
17 patterns — each with templates, key problems, and crucially, how to recognise when to reach for it. That recognition gap is what fails people under pressure. The Quick Revision table shows the Blind 75 problems that matter most per pattern. Practice Mode hides solutions so you work independently inside the same guide.
How system design works here
9 sections that build a complete mental model in sequence: vocabulary → NFRs → layers → building blocks → tech selection → capacity estimation → what-if scenarios → case studies. The What-If Scenarios section is the part most sites skip — 20 failure scenarios with cascade effects, prevention, and recovery. Exactly what interviewers probe when they ask “what happens if Redis goes down?”
Where this fits
Think of it as three tiers:
- Learning from scratch — courses like Educative, DesignGurus, Udemy → Rabbit Holes
- Going deep on a topic — structured courses and deep dives → Rabbit Holes
- Already know it, need it back — Tech Brushup
Tech Brushup is the reload, not the install.