- Frontend Dev – Build Tooling and Deployment
What happens between your source and the files a browser downloads, and how those files get somewhere real. Bundling, the dev server, environment variables and why they are not secret, static hosting on a CDN, cache headers and content hashing, the SPA fallback that 404s every deep link if you forget it, and a CI pipeline worth having.
- Frontend Dev – Testing
How you change code you did not write without being afraid. What is worth testing in a UI and what is not, testing what the user sees rather than what the component holds, querying by role so a test breaks when the app breaks and not when a class name changes, and where end-to-end tests earn their keep.
- React – Interview Questions
Twenty-four senior-level questions and answers — what actually triggers a re-render, why three setState calls only count once, what breaks when you lie to a dependency array, a five-question section on Context, when memo silently does nothing, what error boundaries do not catch, and how to diagnose a slow page. Grounded in real code.
- Python – Code Snippets
The short answers you keep looking up — read a file into a list, sort a dict by value, flatten a nested list, count occurrences, chunk a list, merge dicts, retry a call, time a block. Copy, paste, move on.
- Frontend Dev – Performance and Accessibility
Two subjects in one post because they are the same subject: whether the person on the other end can actually use this. Bundle size and code splitting, the render cost you can measure, images, Core Web Vitals — then semantics, labels, focus order, keyboard operation and contrast, and the four checks that catch most of it.