System design interviews require muscle memory, not memorization. PrepPal builds it with 5-minute daily drills.
You've watched "Design Twitter" three times. In the interview, you freeze. Watching ≠ doing.
8-hour courses demand your weekends. Life gets busy. You fall behind. The interview date doesn't move.
You cram 20 concepts in 3 days. Interview day: your mind goes blank. System design needs muscle memory.
System design interviews test core concepts: APIs, caching, databases, scaling, auth. Master these first.
You don't watch someone design Twitter. YOU design it. We tell you what you missed. Science says this works 50% better.
On your commute. Between meetings. Before bed. Consistency beats intensity.
Once building blocks are solid, tackle full "Design Instagram" scenarios with confidence.
"I watched Grokking twice and still bombed Meta's system design round. PrepPal's daily drills finally made concepts click-I got the offer."
"5 minutes during my commute added up. After 6 weeks, I could explain caching trade-offs in my sleep. Passed the Stripe interview."
"As a frontend engineer, I thought system design wasn't for me. PrepPal showed me the architectural concepts I needed. Nailed the Google onsite."
Choose your seniority level and interview timeline. We'll customize your practice plan.
Daily 5-minute drills on APIs, databases, caching, scaling, auth. Active recall locks in knowledge.
See your weak spots. Our algorithm generates targeted practice to fix gaps.
Combine modules into full system design scenarios. Walk in confident.
No. System design interviews test architectural concepts (APIs, databases, scaling) regardless of your daily role. Frontend, mobile, and full-stack engineers all get asked "Design Instagram"-PrepPal drills what that requires.
Grokking teaches you to memorize solutions. PrepPal trains you to build them. Active recall (you practicing) beats passive reading by 50%+ in retention studies.
Yes. While PrepPal works best with daily practice over weeks, our Interview Sprint mode can accelerate your preparation. Many users report meaningful improvements in 2-3 weeks of focused practice.
PrepPal is mobile-first. Practice during your commute, lunch break, or anywhere. Desktop access included.
Start training with PrepPal today. Free to start, no credit card required.