System Design Interview Masterclass

Crack Software Architect Interviews at Top Tech and Banking Firms.

50 System Design Questions Solved at Architect-Level Depth.

195 pages • 50 custom architecture diagrams • Written by an engineering leader with 20+ years building mission-critical systems in global banking and finance.

Why Most Candidates Fail Senior Interviews:?

scale' or 'How would you build a payment gateway?' — your answer gets vague.

The truth: senior interviews aren't won on coding. They're won on system design — on how you reason about capacity, latency, consistency, failure modes, and trade-offs. Most candidates have read one or two books with 15 sample questions. That's not enough fluency to handle the curveballs real interviewers throw.

This masterclass is the cure. Not a summary. Not a cheat sheet. A 195-page, structured deep-dive across 50 of the most asked senior-level design questions — every one solved the way a real architect would solve it on a whiteboard.

WHY BUY: ?

✅ Real depth, not summaries. Every question is solved across 12 sections: requirements, capacity math, API design, high-level architecture (with diagram), data model, deep dives, scaling, trade-offs, failure handling, and follow-ups. The exact structure senior interviewers grade on.

✅ 50 custom architecture diagrams. Every question comes with a clean, professional architecture diagram you can study, redraw on a whiteboard, and use as a visual anchor on interview day.

✅ Written by an engineering leader, not a content writer. 20+ years leading teams that built high-throughput trading platforms, real-time fraud detection, core banking modernization, and payments infrastructure. These are the trade-offs I make in production — not theory.

📋 WHAT'S INSIDE — The 50 Questions

📂Part 1 — Classic Systems (15)

URL Shortener, Twitter, Instagram, WhatsApp, YouTube, Netflix, Uber, Airbnb, Dropbox, Google Search, Web Crawler, Pastebin, Yelp, Google Docs, Facebook News Feed.

📂Part 2 — Modern Systems (15)

Slack, Zoom, Stripe Payment Gateway, Ad Click Aggregator, TikTok, Notification System, Gmail, Job Scheduler, Online Code Editor, Stock Exchange, Food Delivery, Multiplayer Game, Ticket Booking, Spotify, Recommendation System.

📂Part 3 — Infrastructure (10)

Rate Limiter, Distributed Cache, Kafka-like Queue, S3-like Object Storage, DynamoDB-like KV Store, Elasticsearch-like Search, Zookeeper-like Lock Service, CDN, API Gateway, Service Mesh.

📂Part 4 — Advanced Architecture (10)

Distributed Counter, Real-Time Analytics, ML Feature Store, ML Model Serving, Multi-Region Active-Active DB, Event-Driven Microservices, IoT Pipeline, Gaming Matchmaking, SaaS Multi-Tenancy, Observability Platform.

📋 WHO IT'S FOR

This masterclass is built for engineers serious about leveling up:

🎯Software engineers targeting FAANG, fintech, banking tech.

🎯Tech leads and engineering managers preparing for architect-track interviews.

🎯Engineers chasing staff-level or principal promotions internally.

🎯Aspiring architects who want to think and reason like one — not just memorize.

Not the right fit for: complete beginners or people looking for a one-page cheat sheet. This is premium senior-level material.

📋 ABOUT THE AUTHOR — Trust & Credibility

Sanjay Singh is a seasoned engineering leader with 20+ years of experience architecting and delivering mission-critical systems for global banking and financial services. His teams have built high-throughput trading platforms, real-time fraud detection systems, core banking modernization, payments infrastructure, and regulatory-grade compliance platforms — environments where reliability, security, and performance are non-negotiable.

Follow Sanjay across his channels for free system design content, career guidance, and engineering leadership insights:

YouTube — @ecogrowthpath

Instagram — @ecogrowthpath

Facebook — @ecogrowthpath

📋 GUARANTEE — Risk Reversal

I'm so confident this masterclass will transform how you approach senior interviews that I'm offering an unconditional 7-day money-back guarantee. Buy it. Read it. If it doesn't help you reason like a senior architect, email me within 7 days and I'll refund you in full — no questions, no awkwardness.