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What Exactly Does Kubernetes Do? (K8s)
You packaged your app with Docker and put it on a single server. But what if your site runs a TV ad and 100,000 people suddenly join? Here is how Kubernetes solves this crisis.
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Lessons from building things — not textbook definitions, but real problems I ran into and how I solved them.
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- September 22, 2026
- 02September 21, 2026 · 2 min read
What Exactly Does Docker Do?
What's the phrase software developers say the most? "It worked on my machine!" So why does that same code break when it hits the server, and how does Docker solve this problem?
- 03September 20, 2026 · 1 min read
8 Free Websites You Should Bookmark
8 useful developer tools that will speed up your daily workflow, all completely free with no sign-up required.
- 04September 20, 2026 · 1 min read
Is Frontend Development Just About Design?
If you think frontend development is just coloring in a Figma design with code, you're mistaken. While a designer crafts a single flawless moment, a frontend engineer brings that moment to life across infinite screens, flaky networks, and accessibility standards.
- 05September 18, 2026 · 3 min read
The Weakest Link in Your System: The MD5 Fallacy and Secure Password Hashing
Storing passwords in plain text or with MD5 in your database is a massive mistake. To prevent password cracking that takes seconds with rainbow tables, we have to accept that speed is a vulnerability.
- 06September 17, 2026 · 3 min read
The `==` Trap and Type Coercion in JavaScript
Why is `"" == 0` true? Why is `[] == false` true? Yet why is `NaN == NaN` false? We break down JavaScript's most confusing mechanism—type coercion—and the only foolproof way to escape the mess.
- 07September 15, 2026 · 2 min read
What's the Difference Between Debounce and Throttle?
Typing "istanbul" into a search box sends 8 requests to the server. For 10,000 users, that means 80,000 requests. Debouncing drops this to 1, while throttling drops it to 4 — but they aren't the same thing, and using the right one matters.
- 08September 15, 2026 · 2 min read
JWT Is Not Encrypted, Just Base64
Who can see what's inside the JWT token sent with every request of your app? Answer: everyone. Here's what tokens actually store, why signature verification is enough, and 4 things you should never put in the payload.
- 09September 15, 2026 · 2 min read
How database indexes work: from full table scan to B-Tree
Why does searching for a single email in a table with a million rows take 4 seconds? Full table scan, B-Tree, and a 2000x speedup with a single-line `CREATE INDEX`—plus the classic mistakes that silently disable your index.
- 10September 15, 2026 · 2 min read
Why 0.1 + 0.2 Doesn't Equal 0.3
Type `0.1 + 0.2` into your console, and you won't get `0.3`. It's not a JavaScript bug — you'll get the exact same result in Python, Java, or Go. IEEE 754, mantissas, and why you should never store money as a float.
