Arpit Agarwal

Stuck on something specific and want a real answer instead of another half-right Stack Overflow thread? Ask me directly.

Areas I can help with:

• Browser internals — DNS, TCP, TLS, the HTTP request/response cycle, the rendering pipeline
• JavaScript execution — the event loop, microtasks vs. macrotasks, closures, async/await, common "predict the output" traps
• React — hooks and re-render behavior, state vs. derived state, performance issues (unnecessary re-renders, memoization done wrong), common architecture mistakes
• Other frameworks/libraries — Next.js, Vue, or whatever you're actually working in; concepts usually transfer even if the syntax doesn't
• DevTools — Network waterfalls, Performance profiling, debugging with breakpoints instead of console.log
• State management — local vs. global vs. server state, and why the usual patterns stop working as an app grows
• Component design & performance — structuring components that scale, what actually moves the needle on load/runtime performance
• Interview-answer reviews — paste your own explanation of a concept and I'll tell you if it'd hold up in an actual interview

One focused topic and it's follow up questions per DM keeps response times fast for everyone. I'll get back to you within 1 day.