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.

Your analytics system processes 500,000 events per second. A dashboard needs to show 'page views in the last 5 minutes' updated every second. How do you serve this efficiently?

Pre-compute 1-minute aggregates in the stream processor and sum the last 5 buckets from Redis, Pre-computed 1-minute aggregates in Redis is the standard approach. Flink computes the aggregate for each 1-minute tumbling window and writes to Redis. The dashboard fetches the 5 most recent buckets and sums them. This is O(5) Redis reads regardless of event volume, consistently fast at any scale.

A mobile app sends analytics events in batches. Some events arrive 3 minutes after they occurred. Your stream processor uses 30-second watermarks. What happens to these late events?

They're dropped because they arrived after the watermark, With a 30-second watermark, events arriving more than 30 seconds late are considered 'too late' and dropped from the stream processing. The 1-minute window has already been computed and emitted. For most analytics use cases, dropping events that are 3 minutes late is acceptable, the impact on accuracy is minimal. For exact counts, route late events to a batch correction job.

Your dashboard has 50 unique metric panels. 1,000 users are viewing different dashboards simultaneously. What's the most efficient way to push real-time updates?

Compute each metric once, use a pub/sub system to fan out updates to subscribed WebSocket clients, Each unique metric is computed once by the stream processor. The dashboard service maintains a subscription map: which clients care about which metrics. When a metric updates, it's pushed only to subscribed clients via WebSocket. This means 50 metric computations (regardless of viewer count) and efficient per-client delivery. Polling wastes bandwidth and adds latency.

Design a Real-Time Analytics Dashboard

Name: System Design Masterclass
Availability: InStock

in Capstone

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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“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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