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.

What does 'at-most-once' delivery guarantee?

A message is delivered zero or one time, never retried if lost, At-most-once means the message is sent once with no retries. It either arrives and is processed, or it's lost forever. The 'at most' qualifier means it could be zero times (lost) or one time (delivered), but never more than once.

You're building a real-time game that sends player positions 60 times per second. Which delivery guarantee should you use?

At-most-once, a missed position is corrected by the next update a fraction of a second later, At 60 updates per second, a missing position update is irrelevant. The next update arrives 16ms later and corrects any drift. The overhead of acknowledgments and retries would destroy the real-time performance that matters far more than guaranteed delivery.

In RabbitMQ with autoAck: true, what happens if the consumer crashes while processing a message?

The message is lost, it was already removed from the queue on delivery, With autoAck: true, RabbitMQ removes the message from the queue the moment it delivers it. If the consumer crashes during processing, the message is gone. This is at-most-once delivery in action.

At-Most-Once Delivery

Name: System Design Masterclass
Availability: InStock

in Messaging Event Systems

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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$19.99$7.99/lifetime

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Foundation lessons free, try before you buy

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India

₹999₹499/lifetime

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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

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