What Is Rate Limiting? HTTP 429 and Protecting Your API | Learn in 30 Seconds
One client starts hammering your API, and everyone else pays for it. Your server burns its capacity on one noisy caller while normal requests queue behind it...
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Technical videos
Walkthroughs and talks on backend architecture, AI automation and the tooling we build with.
What Is Blue-Green Deployment? | Learn in 30 Seconds
What Is Blue-Green Deployment? Ship Without the Downtime Window | Learn in 30 Seconds Deploying usually means a moment where your app is down. You restart...
What Is the Circuit Breaker Pattern? Fail Fast, Recover Safely | Learn in 30 Seconds
What Is the Circuit Breaker Pattern? Fail Fast, Recover Safely | Learn in 30 Seconds A downstream service goes down. Your application keeps calling it. Now...
CI vs CD: Continuous Delivery and Deployment | Learn in 30 Seconds
CI vs CD: Continuous Delivery and Deployment Are Not the Same Thing | Learn in 30 Seconds Three terms, two letters, and one distinction almost everyone...
What Is Idempotency? Learn in 30 Seconds
What Is Idempotency? How APIs Stop Double Charges | Learn in 30 Seconds Your checkout freezes. The customer taps Pay again. Did they just pay twice? Here's...
Vertical vs Horizontal Scaling | Learn in 30 Seconds
Your app is outgrowing its server. You have two moves. VERTICAL SCALING (scale up) — give the same machine more resources. 4 vCPU becomes 16, 8 GB RAM...
What Is a CDN? in 30 Seconds
The same website can feel instant in one country and sluggish in another. Often the culprit isn't your code — it's physics. Every byte has to cross the...
What Is a Load Balancer? Traffic Distribution Explained | Learn in 30 Seconds
One server can only take so much. When traffic climbs, CPU saturates, response times stretch, and requests start failing — and every user is stuck behind the...
What Really Happens When You Type a URL and Press Enter? | Learn in 30 Seconds
You press Enter and the page appears. In between, four stages run in a few hundred milliseconds — and knowing them is the difference between guessing at a...
What Is an ORM? Active Record Explained for Rails Developers | Learn in 30 Seconds
Your application thinks in objects. Your database thinks in rows. An ORM — Object-Relational Mapping — is the bridge between them. Without one, every query...
What Is MCP? Model Context Protocol Explained | Learn in 30 Seconds
Your AI model is capable, but on its own it can't read your files, query your database, or call your APIs. MCP — the Model Context Protocol — is the standard...
PHP2Shell: Critical PHP RCE — Patch Now (CVE-2026-109618 / 109619) | Learn in 30 Seconds
Two critical vulnerabilities in PHP, disclosed 21 October 2026, allow remote code execution on web-facing servers without authentication. Both are rated CVSS...
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