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 are IP addresses considered PII under GDPR?

Because they can be used to identify or locate an individual, either directly or in combination with other data, GDPR defines personal data broadly: any information that can identify an individual directly or indirectly. IP addresses, especially static ones, can be linked to individuals through ISP records. Even dynamic IPs can identify users when combined with timestamps and ISP logs. The European Court of Justice confirmed this in the Breyer v. Germany ruling (2016).

What is the most common way PII accidentally leaks from systems?

PII included in application log files, which often have weaker access controls than databases, Developers add logging for debugging: 'Processing order for user.email'. This PII flows into log aggregation (ELK, Datadog, CloudWatch) where access controls are often far weaker than the production database. The fix: never log PII, use opaque identifiers instead.

Why can combining three 'harmless' fields (zip code, birth date, gender) identify a specific person?

Because the combination narrows the population to a unique individual in 87% of cases, making them quasi-identifiers, Latanya Sweeney's research showed that just three quasi-identifiers, zip code, birth date, and gender, uniquely identify 87% of Americans. Each field alone is harmless, but their intersection narrows the population so severely that re-identification becomes trivial. This is why PII classification must consider field combinations, not just individual fields.

PII Handling

Name: System Design Masterclass
Availability: InStock

in Data Governance Compliance

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