Writing about development and technology.
Started with SQL LIKE, hit its limits, moved to Elasticsearch, and got shocked by operational costs. The real trade-offs of search systems.
Integrating a payment API is just the beginning. Idempotency, refund flows, and double-charge prevention make payment systems genuinely hard.
Building a feed like Instagram sounds simple until a user with 1M followers posts. Understanding push vs pull models and fan-out strategies.
1:1 chat is straightforward, but group chat, read receipts, and offline messages turn it into a completely different beast.
A URL shortener sounds trivial until you face hash collisions, expiration policies, and redirect latency. A microcosm of system design.
Optimizing by gut feeling made my app slower. Learn to use Performance profiler to find real bottlenecks and fix what matters.
Your app starts fast but slows to a crawl after 10 minutes. Learn to find and fix memory leaks using Chrome DevTools Memory tab.
Your app works perfectly on localhost but crashes in production. Set up Sentry and error tracking to catch bugs before users complain.
That wall of red text in your console isn't random noise. Learn to read stack traces and find bugs in seconds, not hours.
Stop guessing why your React app is slow. React DevTools Profiler shows exactly which components re-render and why.
When your API returns unexpected data, the Network tab is your best friend. Learn to inspect requests, responses, headers, and timing.
You don't need 100 console.logs to find a bug. Learn to use browser debugger, breakpoints, and watch expressions effectively.
Stop firing API calls on every keystroke and scroll event. A practical guide to debounce and throttle with real-world examples.
Editing a modal inside a dashboard requires 5 clicks to see changes? Isolate your UI with Storybook and develop components 10x faster.
One typo in a component crashes the entire page? Learn how to use Error Boundaries to isolate crashes and show fallback UIs gracefully.
Trusted TypeScript but got crashed by runtime data? Learn why you need 'Runtime Validation' and how to use Zod to secure your data layer.
Component growing too large? Logic mixed with UI? Learn how to extract business logic into Custom Hooks for cleaner, testable code.
Every new feature bloats your JS bundle. Learn practical Code Splitting, Tree Shaking, and Dynamic Import techniques to keep your app fast and lightweight.
Managing API state with `isLoading`, `isError`, `data`? Learn how Discriminated Unions prevent 'impossible states' and simplify your logic.
Obsessively wrapping everything in `useMemo`? It might be hurting your performance. Learn the hidden costs of memoization and when to actually use it.
