Mock System Design Interview

A realistic, high-pressure system design mock interview with detailed

feedback. Exactly how it runs in a real loop at a top company.

How the session runs:

→ 5 min: Quick intro, understand your target role/company

→ 35 min: Live system design problem (you drive, I play interviewer)

→ 20 min: Detailed debrief — what worked, what didn't, what would

have got you the offer

Problems I cover:

→ URL shortener, rate limiter, notification service (classic warm-up)

→ Payment systems, order management, multi-tenant SaaS

→ Real-time systems: chat, feed, live tracking

→ AI/ML system design: recommendation engine, LLM serving infra

Feedback includes:

→ Scoring across: requirements gathering, high-level design,

deep-dive, trade-offs, communication

→ Written scorecard shared after session

→ Top 3 things to fix before your next real interview

Best for: Engineers targeting senior/staff roles at product companies,

startups, or MNCs. Also useful pre-FAANG loops.

I've been on both sides of the interview table for 8+ years.