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 an online-first architecture, what is the source of truth for data?

The server database, Online-first treats the server as the authoritative data source. Local state and caches are previews that reconcile with the server.

What must happen when an optimistic update is rejected by the server?

Roll back the UI to reflect the server's actual state, The cache is a preview, the server is the truth. When the server rejects a mutation, the local optimistic update must revert so the UI stays consistent with reality.

Which scenario is a poor fit for online-first architecture?

A warehouse inventory scanner used in areas with spotty cellular coverage, Warehouse scanners operate in environments with unreliable connectivity. Offline-first with background sync handles this better because writes must succeed even when the network drops.

What does stale-while-revalidate mean in the context of online-first reads?

Show cached data immediately and fetch fresh data in the background, SWR serves cached (potentially stale) data instantly for a fast UI, then revalidates with the server in the background. When fresh data arrives, the UI updates.

Online-First Architecture

Name: System Design Masterclass
Availability: InStock

in Web Content Delivery

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.”

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All 766 interactive lessons

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