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.

You want to track the number of items currently in a processing queue. Should you use a counter or a gauge?

Gauge, queue depth goes up and down as items are added and consumed, Queue depth is a value that fluctuates, it increases when items arrive and decreases when they're consumed. That's a gauge. A counter would track total items ever added (monotonically increasing), which is useful for throughput but doesn't tell you the current backlog.

Your CPU gauge reports 92% utilization at 10:00:00, then 15% at 10:00:15 (next scrape). What might have happened?

A brief spike happened, the gauge only captures snapshots, so you missed what happened between samples, Gauges capture point-in-time snapshots. Between the 92% reading and the 15% reading, the CPU could have done anything, spiked to 100%, dropped to 5%, or oscillated wildly. You only see the value at the exact moment of each sample. This is why short sample intervals matter for gauges.

Gauge Metrics

Name: System Design Masterclass
Availability: InStock

in Observability Monitoring

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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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

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