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Original rewrites on React, Node.js, TypeScript and AI — practical notes from the same engineering practice behind our operator software. Article bodies are in English.
Tagged: interview
LangChain interview prep with short answers, deeper cuts, and traps
Rehearse LangChain fundamentals as problem-first interview answers with code drills anchored to a checkout outage ticket.
2591 wordsRead articleReact interview guide: hooks, rendering, and what large companies ask
Virtual DOM, hooks pitfalls, performance, state management, React 18, live coding exercises, and how to explain the why behind re-renders.
1332 wordsRead articleJavaScript event loop: microtasks, macrotasks, and the call stack
Trace how promises, timers, and fetch callbacks move through microtask and task queues so async logs stop looking random in interviews and production bugs.
620 wordsRead articleHow V8 closure contexts retain memory beyond what one function uses
V8 builds one shared context per call for every outer variable any inner function mentions—so unused siblings and permanent listeners can pin large values.
1849 wordsRead article
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