Home/Resources/30-Day Prep Roadmap

30-Day Senior Frontend Interview Roadmap

A comprehensive, day-by-day curriculum designed to turn conceptual knowledge into automatic, confident explanations during Senior and Staff UI technical rounds.

Week 01

JavaScript Core & Asynchronous Execution

7 Days

Day 1-2:Event Loop, Call Stack, Microtask queue execution order

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Day 3-4:Closures, Lexical scoping, and Garbage collection memory leaks

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Day 5-6:Prototypes, Prototypal inheritance, and Class transpilations

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Day 7:Promise concurrency (Promise.allSettled, race, custom Promise implementation)

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Week 02

Modern React & Concurrent Architecture

7 Days

Day 8-9:Fiber reconciliation, Work loops, and Render vs Commit phases

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Day 10-11:React 19 Actions (useActionState, useOptimistic, Form state)

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Day 12-13:Custom Hooks design patterns, Reusability, and Stale closure bugs

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Day 14:Component re-render optimizations and React compiler memoization

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Week 03

Performance, Core Web Vitals & CSS Layout

7 Days

Day 15-16:Interaction to Next Paint (INP) debugging and scheduler.yield()

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Day 17-18:Largest Contentful Paint (LCP) & Cumulative Layout Shift (CLS) audit

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Day 19-20:CSS Grid vs Flexbox layout algorithms, Stacking contexts, and BFC

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Day 21:Infinite list virtualization with dynamic row heights and ResizeObserver

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Week 04

Frontend System Design & Staff+ Whiteboarding

7 Days

Day 22-24:4-Pillar Frontend System Design framework (Data, State, Latency, Failure)

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Day 25-26:Design an AI Chat interface with streaming SSE, backpressure & markdown

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Day 27-28:Design an Enterprise Autocomplete widget with 150ms debouncing & caching

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Day 29-30:Full Mock Interview simulation, self-evaluation, and weakness review

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Home/Resources/30-Day Prep Roadmap

30-Day Senior Frontend Interview Roadmap

A comprehensive, day-by-day curriculum designed to turn conceptual knowledge into automatic, confident explanations during Senior and Staff UI technical rounds.

Week 01