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.

Why do sticky sessions create availability problems?

When the pinned server fails, all users assigned to it lose their sessions simultaneously, Sticky sessions bind users to specific servers. When that server crashes, every user pinned to it is immediately logged out. A centralized session store avoids this by making sessions accessible from any server.

What is the main limitation of using JWTs as session tokens?

JWTs cannot be revoked before expiry without maintaining server-side state like a blocklist, JWTs are self-contained and verified by signature alone. The server has no way to invalidate a specific token before its exp claim. A blocklist reintroduces the server-side state JWTs were designed to eliminate.

Why should the session ID be regenerated after authentication?

To prevent session fixation attacks where an attacker pre-sets a known session ID before the victim logs in, In a session fixation attack, the attacker sets a session ID on the victim's browser before login. If the server keeps the same session ID after authentication, the attacker already knows it. Regenerating the ID after login invalidates any pre-set value.

Distributed Session Management

Name: System Design Masterclass
Availability: InStock

in Security Architecture

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

One-time payment. Lifetime access. No subscription.

Global

$19.99$7.99/lifetime

One-time payment via PayPal

Get Lifetime Access

Foundation lessons free, try before you buy

Founders price, locked for the first 10,000 customers

India Special

India

₹999₹499/lifetime

One-time via UPI, cards, or net banking

Get Lifetime Access

Foundation lessons free, try before you buy

Founders price, locked for the first 10,000 customers

“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