Is this a video course?

No. This is an interactive, slide-based learning platform. Each lesson has rich text, animated diagrams, live code editors, and quizzes. You learn by reading, interacting, and doing, not by watching videos passively.

How long do I have access?

Forever. Both pricing tiers are one-time payments with lifetime access. This includes all current 766 lessons and any future content we add.

What level of experience do I need?

None. We start from absolute basics like 'What is latency?' and build up to distributed consensus protocols. The Foundation level assumes zero prior knowledge of system design.

How much does the system design course cost?

7.99 US dollars for lifetime access globally, or 499 Indian rupees for lifetime access in India. One-time payment, no subscription, no hidden fees. 11 lessons are free with no signup required.

What technologies are covered?

Everything from DNS and load balancers to Kubernetes, Kafka, distributed databases, consensus protocols, stream processing, security architecture, and observability. We cover principles and real-world implementations used at Netflix, Google, Amazon, Uber, Stripe, and more.

Is this useful for system design interview preparation?

Yes. The lessons are structured around the exact topics asked in system design interviews at FAANG and top-tier companies. Interactive diagrams help you practice whiteboard-style explanations. Covers everything from URL shortener design to distributed payment systems.

How is this different from ByteByteGo or Educative?

766 interactive lessons (4x more than most competitors), 16 different diagram types that build step by step, real production examples from Netflix, Google, Amazon, Uber, and Stripe, and lifetime access for a one-time payment of $7.99 instead of annual subscriptions costing 100 to 200 dollars per year.

In a standard GFS rotation with 6 sons, 4 fathers, and 12 grandfathers, how many distinct backup copies exist at any given time?

22, across all three tiers, A GFS set holds copies across all three tiers simultaneously: 6 daily sons plus 4 weekly fathers plus 12 monthly grandfathers equals 22 distinct backups. Each tier serves a different recovery window.

Why is the weekly father tier considered the most critical during real data corruption incidents?

Most corruption grows silently over weeks, so daily sons are already tainted by the time someone notices, Subtle data corruption often spreads for weeks before detection. By that point, every recent daily backup holds the same bad data. The weekly fathers provide the first clean recovery point without jumping all the way back to a monthly grandfather.

What destroyed Code Spaces in 2014 despite having AWS backups?

An attacker who compromised their AWS console deleted both production and all backups from the same control plane, Code Spaces stored production data and all backups on the same AWS account. When an attacker gained console access, they deleted everything. This is why the 3-2-1 rule requires at least one offsite copy on a separate control plane.

Why do banks and film studios still use physical tape rotation in 2026?

Tape provides a physical air gap that ransomware and compromised cloud credentials cannot reach, A tape cartridge in an offsite vault cannot be encrypted by ransomware or deleted by a compromised IAM role. This physical air gap is what NIST 800-171 and FedRAMP require, and it is the one thing cloud-only backup strategies cannot provide.

Backup Rotation

Name: System Design Masterclass
Availability: InStock

in Reliability Resilience

This lesson is part of the full System Design Masterclass. Unlock it along with 765 other lessons for a one-time payment.

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Foundation lessons free, try before you buy

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India

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Foundation lessons free, try before you buy

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“The interactive diagrams alone are worth way more than the price.”

Anish K., Senior Engineer at a Bengaluru startup

All 766 interactive lessons

Step-by-step animated diagrams

Live code editors with real execution

Quizzes with instant feedback

Completion certificates per level

Lifetime access, all future content included

The first 5 Foundation lessons are free, no payment needed. Try them now