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Ultimate Frontend Engineering Interview Preparation Plan 2025

Intensive 4-Month Program: 7 Days/Week, 50+ Hours/Week

Single Source of Truth for Frontend Interview Success
Complete checklist-based plan with daily tasks, specific LeetCode problems, and latest interview questions

Daily Schedule Template (50+ Hours/Week)

Weekday Schedule (Monday-Friday): 8 hours/day

  • 6:00-7:00 AM: LeetCode Practice (2-3 problems)
  • 7:00-8:00 AM: JavaScript/React Fundamentals
  • 9:00-12:00 PM: Core Technical Learning (3 hours)
  • 1:00-3:00 PM: Machine Coding Practice (2 hours)
  • 7:00-8:00 PM: System Design Study

Weekend Schedule (Saturday-Sunday): 10 hours/day

  • 8:00-10:00 AM: LeetCode Marathon (4-5 problems)
  • 10:00-12:00 PM: Project Building
  • 1:00-4:00 PM: System Design Practice (3 hours)
  • 4:00-6:00 PM: Mock Interviews
  • 7:00-8:00 PM: Review & Planning

Total: 40 hours (weekdays) + 20 hours (weekends) = 60 hours/week

MONTH 1: FOUNDATIONS & CORE JAVASCRIPT (Weeks 1-4)

Week 1: JavaScript Deep Dive & Basic DSA

Day 1: Monday

6:00-7:00 AM: LeetCode Practice

  • #1 Two Sum (Easy warmup)
  • #121 Best Time to Buy and Sell Stock (Easy)
  • #217 Contains Duplicate (Easy)

7:00-8:00 AM: JavaScript Fundamentals

  • Execution Context and Scope Chain
  • Variable declarations: var, let, const
  • Hoisting mechanism
  • Temporal Dead Zone

9:00-12:00 PM: Core Learning

  • Closures Deep Dive
    • What are closures and how they work
    • Closure use cases (data privacy, function factories)
    • Common closure pitfalls and solutions
    • Implement counter using closure
    • Module pattern implementation

1:00-3:00 PM: Machine Coding

  • Build Basic Button Component
    • Props: variant, size, disabled, loading
    • Event handling
    • CSS styling with multiple variants
    • Accessibility features (ARIA labels)

7:00-8:00 PM: System Design Basics

  • Frontend architecture overview
  • Component-based architecture principles
  • State management patterns introduction

Day 2: Tuesday

6:00-7:00 AM: LeetCode Practice

  • #242 Valid Anagram (Easy)
  • #49 Group Anagrams (Medium)
  • #347 Top K Frequent Elements (Medium)

7:00-8:00 AM: JavaScript Fundamentals

  • Prototypal inheritance
  • Constructor functions vs Class syntax
  • Object.create() and prototype chain
  • Function.prototype methods

9:00-12:00 PM: Core Learning

  • Advanced Functions
    • Higher-order functions
    • Function currying implementation
    • Partial application
    • Function composition
    • Implement bind, call, apply polyfills

1:00-3:00 PM: Machine Coding

  • Build Input Component
    • Controlled/uncontrolled modes
    • Validation states
    • Different input types
    • Error message display

7:00-8:00 PM: Review & Practice

  • Review Day 1 concepts
  • Solve additional closure problems

Day 3: Wednesday

6:00-7:00 AM: LeetCode Practice

  • #238 Product of Array Except Self (Medium)
  • #36 Valid Sudoku (Medium)
  • #128 Longest Consecutive Sequence (Medium)

7:00-8:00 AM: JavaScript Fundamentals

  • Event loop and call stack
  • Microtasks vs Macrotasks
  • setTimeout, setInterval, Promise execution order

9:00-12:00 PM: Core Learning

  • Asynchronous JavaScript
    • Callback patterns and callback hell
    • Promise implementation from scratch
    • async/await deep dive
    • Error handling in async code
    • Promise.all, Promise.race, Promise.allSettled

1:00-3:00 PM: Machine Coding

  • Build Modal Component
    • Portal rendering
    • Focus trap implementation
    • ESC key handling
    • Backdrop click to close

7:00-8:00 PM: System Design

  • Component communication patterns
  • Props vs Context vs State management

Day 4: Thursday

6:00-7:00 AM: LeetCode Practice

  • #11 Container With Most Water (Medium)
  • #15 3Sum (Medium)
  • #42 Trapping Rain Water (Hard)

7:00-8:00 AM: JavaScript Fundamentals

  • ES6+ features deep dive
  • Destructuring patterns
  • Spread and rest operators
  • Template literals and tagged templates

9:00-12:00 PM: Core Learning

  • Array and Object Methods
    • Implement Array.prototype.map
    • Implement Array.prototype.filter
    • Implement Array.prototype.reduce
    • Deep clone implementation
    • Object manipulation methods

1:00-3:00 PM: Machine Coding

  • Build Dropdown/Select Component
    • Keyboard navigation
    • Search functionality
    • Multi-select support
    • Virtualization for large lists

7:00-8:00 PM: Utility Functions

  • Implement debounce function
  • Implement throttle function
  • Memoization implementation

Day 5: Friday

6:00-7:00 AM: LeetCode Practice

  • #125 Valid Palindrome (Easy)
  • #5 Longest Palindromic Substring (Medium)
  • #647 Palindromic Substrings (Medium)

7:00-8:00 AM: JavaScript Fundamentals

  • Module systems (CommonJS vs ES6 modules)
  • Dynamic imports
  • Tree shaking concepts

9:00-12:00 PM: Core Learning

  • DOM Manipulation
    • Element selection methods
    • DOM traversal techniques
    • Event delegation patterns
    • Custom event creation
    • Performance best practices

1:00-3:00 PM: Machine Coding

  • Build Tooltip Component
    • Positioning engine
    • Multiple trigger types
    • Animation effects
    • Boundary detection

7:00-8:00 PM: Week Review

  • Review all concepts covered
  • Identify weak areas
  • Plan weekend practice

Day 6: Saturday

8:00-10:00 AM: LeetCode Marathon

  • #20 Valid Parentheses (Easy)
  • #155 Min Stack (Medium)
  • #150 Evaluate Reverse Polish Notation (Medium)
  • #739 Daily Temperatures (Medium)
  • #22 Generate Parentheses (Medium)

10:00-12:00 PM: Project Building

  • Build Calculator Component
    • Basic arithmetic operations
    • Memory functions
    • Keyboard support
    • History tracking

1:00-4:00 PM: System Design Practice

  • Design a Todo Application
    • Component structure
    • State management approach
    • Data persistence
    • Performance considerations

4:00-6:00 PM: Mock Interview

  • JavaScript coding interview simulation
  • DOM manipulation challenges
  • Explain concepts out loud

7:00-8:00 PM: Review & Planning

  • Week 1 assessment
  • Adjust study plan if needed

Day 7: Sunday

8:00-10:00 AM: LeetCode Marathon

  • #704 Binary Search (Easy)
  • #74 Search a 2D Matrix (Medium)
  • #33 Search in Rotated Sorted Array (Medium)
  • #153 Find Minimum in Rotated Sorted Array (Medium)
  • #981 Time Based Key-Value Store (Medium)

10:00-12:00 PM: Project Building

  • Build Image Gallery Component
    • Lazy loading implementation
    • Lightbox functionality
    • Keyboard navigation
    • Touch/swipe support

1:00-4:00 PM: Advanced Concepts

  • Performance Optimization
    • Memory leak prevention
    • Efficient DOM updates
    • Event listener optimization
    • Garbage collection understanding

4:00-6:00 PM: Practice & Review

  • Solve additional JavaScript challenges
  • Review week's machine coding projects

7:00-8:00 PM: Week Planning

  • Plan Week 2 focus areas
  • Set specific goals

Week 2: React Fundamentals & Intermediate DSA

Day 8: Monday

6:00-7:00 AM: LeetCode Practice

  • #206 Reverse Linked List (Easy)
  • #21 Merge Two Sorted Lists (Easy)
  • #141 Linked List Cycle (Easy)

7:00-8:00 AM: React Basics

  • JSX syntax and transformations
  • Component props and children
  • Conditional rendering patterns

9:00-12:00 PM: Core Learning

  • React Component Fundamentals
    • Functional vs Class components
    • Component lifecycle understanding
    • Props validation with PropTypes
    • Component composition patterns
    • Render props pattern

1:00-3:00 PM: Machine Coding

  • Build Accordion Component
    • Multiple panels support
    • Controlled/uncontrolled modes
    • Animation effects
    • Keyboard accessibility

7:00-8:00 PM: React State

  • useState hook deep dive
  • State update patterns
  • Lifting state up

Day 9: Tuesday

6:00-7:00 AM: LeetCode Practice

  • #143 Reorder List (Medium)
  • #19 Remove Nth Node From End of List (Medium)
  • #138 Copy List with Random Pointer (Medium)

7:00-8:00 AM: React Hooks

  • useEffect hook patterns
  • Dependency arrays
  • Cleanup functions

9:00-12:00 PM: Core Learning

  • React Hooks Deep Dive
    • useState with lazy initialization
    • useEffect for side effects
    • useContext for prop drilling
    • useReducer for complex state
    • Custom hooks creation
    • Hook rules and best practices

1:00-3:00 PM: Machine Coding

  • Build Tab Component
    • Dynamic tab creation
    • Lazy loading of tab content
    • Keyboard navigation
    • URL synchronization

7:00-8:00 PM: State Management

  • Context API patterns
  • Provider composition

Day 10: Wednesday

6:00-7:00 AM: LeetCode Practice

  • #102 Binary Tree Level Order Traversal (Medium)
  • #104 Maximum Depth of Binary Tree (Easy)
  • #226 Invert Binary Tree (Easy)

7:00-8:00 AM: React Performance

  • React.memo usage
  • useMemo and useCallback
  • Re-render optimization

9:00-12:00 PM: Core Learning

  • React Performance Optimization
    • Virtual DOM understanding
    • Reconciliation algorithm
    • Component re-render prevention
    • Code splitting with React.lazy
    • Bundle size optimization
    • Profiling with React DevTools

1:00-3:00 PM: Machine Coding

  • Build Autocomplete Component
    • Debounced search
    • Keyboard navigation
    • API integration
    • Loading and error states
    • Highlight matching text

7:00-8:00 PM: Advanced Patterns

  • Higher-Order Components
  • Render props vs hooks

Day 11: Thursday

6:00-7:00 AM: LeetCode Practice

  • #124 Binary Tree Maximum Path Sum (Hard)
  • #543 Diameter of Binary Tree (Easy)
  • #110 Balanced Binary Tree (Easy)

7:00-8:00 AM: TypeScript Basics

  • Basic types and interfaces
  • Generic types introduction
  • Union and intersection types

9:00-12:00 PM: Core Learning

  • TypeScript for React
    • Component prop typing
    • Event handler typing
    • useRef typing patterns
    • Custom hook typing
    • Context typing strategies
    • Advanced type patterns

1:00-3:00 PM: Machine Coding

  • Build Data Table Component
    • Sortable columns
    • Filtering functionality
    • Pagination
    • Row selection
    • Custom cell renderers

7:00-8:00 PM: TypeScript Practice

  • Type challenges from type-challenges repo
  • Complex type inference problems

Day 12: Friday

6:00-7:00 AM: LeetCode Practice

  • #200 Number of Islands (Medium)
  • #994 Rotting Oranges (Medium)
  • #207 Course Schedule (Medium)

7:00-8:00 AM: React Testing

  • React Testing Library basics
  • Testing user interactions
  • Async testing patterns

9:00-12:00 PM: Core Learning

  • Testing in React
    • Component testing strategies
    • Testing custom hooks
    • Mocking external dependencies
    • Integration testing
    • E2E testing with Cypress/Playwright
    • Test-driven development

1:00-3:00 PM: Machine Coding

  • Build Infinite Scroll Component
    • Intersection Observer
    • Virtual scrolling for performance
    • Loading states
    • Error handling
    • Retry mechanisms

7:00-8:00 PM: Week Review

  • React concepts consolidation
  • Identify areas for improvement

Day 13: Saturday

8:00-10:00 AM: LeetCode Marathon

  • #70 Climbing Stairs (Easy)
  • #198 House Robber (Medium)
  • #213 House Robber II (Medium)
  • #5 Longest Palindromic Substring (Medium)
  • #322 Coin Change (Medium)

10:00-12:00 PM: Project Building

  • Build Weather Dashboard
    • API integration
    • Multiple city support
    • Local storage for favorites
    • Responsive design

1:00-4:00 PM: System Design

  • Design Instagram Feed
    • Component architecture
    • Image optimization
    • Infinite scroll implementation
    • Like/comment functionality

4:00-6:00 PM: Mock Interview

  • React component building
  • TypeScript usage
  • Performance optimization discussion

7:00-8:00 PM: Review & Planning

  • Week 2 assessment
  • Prepare for Week 3

Day 14: Sunday

8:00-10:00 AM: LeetCode Marathon

  • #152 Maximum Product Subarray (Medium)
  • #139 Word Break (Medium)
  • #300 Longest Increasing Subsequence (Medium)
  • #1143 Longest Common Subsequence (Medium)
  • #72 Edit Distance (Hard)

10:00-12:00 PM: Project Building

  • Build Chat Application UI
    • Message bubbles
    • Emoji support
    • File upload
    • Real-time simulation

1:00-4:00 PM: Advanced React

  • React 19 Features
    • Server Components
    • use() hook
    • Server Actions
    • Concurrent features

4:00-6:00 PM: Practice & Review

  • Combine all Week 2 components
  • Code review and optimization

7:00-8:00 PM: Week Planning

  • Plan Week 3 advanced topics

Week 3: Advanced React & System Design Basics

Day 15: Monday

6:00-7:00 AM: LeetCode Practice

  • #39 Combination Sum (Medium)
  • #40 Combination Sum II (Medium)
  • #78 Subsets (Medium)

7:00-8:00 AM: State Management

  • Redux fundamentals
  • Actions, reducers, store
  • Redux Toolkit basics

9:00-12:00 PM: Core Learning

  • Advanced State Management
    • Redux Toolkit setup and slices
    • RTK Query for data fetching
    • Redux middleware patterns
    • Zustand as alternative
    • Context vs Redux decision tree
    • State normalization patterns

1:00-3:00 PM: Machine Coding

  • Build Shopping Cart
    • Add/remove items
    • Quantity management
    • Persistent storage
    • Price calculations
    • Checkout flow

7:00-8:00 PM: System Design Intro

  • Frontend architecture patterns
  • Monolithic vs micro-frontend

Day 16: Tuesday

6:00-7:00 AM: LeetCode Practice

  • #90 Subsets II (Medium)
  • #46 Permutations (Medium)
  • #79 Word Search (Medium)

7:00-8:00 AM: Next.js Basics

  • Pages and routing
  • SSR vs SSG
  • API routes

9:00-12:00 PM: Core Learning

  • Meta-Frameworks
    • Next.js App Router
    • Server-side rendering
    • Static site generation
    • API routes and middleware
    • Image optimization
    • Performance optimization

1:00-3:00 PM: Machine Coding

  • Build File Upload Component
    • Drag and drop
    • Progress tracking
    • File validation
    • Multiple file support
    • Preview functionality

7:00-8:00 PM: Performance

  • Core Web Vitals
  • Performance measurement tools

Day 17: Wednesday

6:00-7:00 AM: LeetCode Practice

  • #17 Letter Combinations of a Phone Number (Medium)
  • #51 N-Queens (Hard)
  • #131 Palindrome Partitioning (Medium)

7:00-8:00 AM: Web Performance

  • Bundle analysis
  • Code splitting strategies
  • Lazy loading techniques

9:00-12:00 PM: Core Learning

  • Performance Optimization
    • Lighthouse audit optimization
    • Core Web Vitals improvement
    • Image optimization strategies
    • CSS and JavaScript minification
    • CDN implementation
    • Caching strategies

1:00-3:00 PM: Machine Coding

  • Build Virtualized List
    • Window calculation
    • Dynamic item heights
    • Smooth scrolling
    • Buffer implementation
    • Performance monitoring

7:00-8:00 PM: Caching

  • Browser caching mechanisms
  • Service Worker basics

Day 18: Thursday

6:00-7:00 AM: LeetCode Practice

  • #295 Find Median from Data Stream (Hard)
  • #347 Top K Frequent Elements (Medium)
  • #215 Kth Largest Element in an Array (Medium)

7:00-8:00 AM: PWA Concepts

  • Service Workers
  • Web App Manifest
  • Offline strategies

9:00-12:00 PM: Core Learning

  • Progressive Web Apps
    • Service Worker implementation
    • Caching strategies
    • Background sync
    • Push notifications
    • Web App Manifest
    • Offline functionality

1:00-3:00 PM: Machine Coding

  • Build Rich Text Editor
    • Content editable
    • Formatting toolbar
    • Undo/redo functionality
    • Copy/paste handling
    • Plugin architecture

7:00-8:00 PM: Browser APIs

  • Web Workers
  • IndexedDB
  • Geolocation API

Day 19: Friday

6:00-7:00 AM: LeetCode Practice

  • #208 Implement Trie (Prefix Tree) (Medium)
  • #211 Design Add and Search Words Data Structure (Medium)
  • #212 Word Search II (Hard)

7:00-8:00 AM: Security

  • XSS prevention
  • CSRF protection
  • Content Security Policy

9:00-12:00 PM: Core Learning

  • Web Security
    • Cross-Site Scripting (XSS) prevention
    • Cross-Site Request Forgery (CSRF)
    • Content Security Policy (CSP)
    • HTTPS implementation
    • Authentication patterns
    • Authorization strategies

1:00-3:00 PM: Machine Coding

  • Build Form Builder
    • Dynamic field creation
    • Validation rules
    • Conditional fields
    • Form submission
    • Data serialization

7:00-8:00 PM: Week Review

  • Advanced React concepts review
  • Performance optimization recap

Day 20: Saturday

8:00-10:00 AM: LeetCode Marathon

  • #84 Largest Rectangle in Histogram (Hard)
  • #85 Maximal Rectangle (Hard)
  • #239 Sliding Window Maximum (Hard)
  • #76 Minimum Window Substring (Hard)
  • #560 Subarray Sum Equals K (Medium)

10:00-12:00 PM: Project Building

  • Build E-commerce Product Page
    • Image gallery with zoom
    • Variant selection
    • Reviews system
    • Related products
    • Add to cart functionality

1:00-4:00 PM: System Design

  • Design Netflix Frontend
    • Video player component
    • Content discovery
    • Recommendation system
    • User profiles
    • Offline viewing

4:00-6:00 PM: Mock Interview

  • System design discussion
  • Performance optimization questions
  • Security considerations

7:00-8:00 PM: Review & Planning

  • Week 3 comprehensive review

Day 21: Sunday

8:00-10:00 AM: LeetCode Marathon

  • #23 Merge k Sorted Lists (Hard)
  • #25 Reverse Nodes in k-Group (Hard)
  • #146 LRU Cache (Medium)
  • #460 LFU Cache (Hard)
  • #297 Serialize and Deserialize Binary Tree (Hard)

10:00-12:00 PM: Project Building

  • Build Real-time Dashboard
    • WebSocket integration
    • Chart components
    • Data filtering
    • Export functionality
    • Responsive layout

1:00-4:00 PM: Advanced Concepts

  • Micro-frontend Architecture
    • Module Federation
    • Independent deployments
    • Shared dependencies
    • Cross-app communication

4:00-6:00 PM: Integration

  • Combine Week 3 projects
  • Performance testing

7:00-8:00 PM: Month 1 Review

  • Complete Month 1 assessment
  • Plan Month 2 focus

Week 4: Algorithm Focus & Integration

Day 22: Monday

6:00-7:00 AM: LeetCode Practice

  • #224 Basic Calculator (Hard)
  • #227 Basic Calculator II (Medium)
  • #772 Basic Calculator III (Hard)

7:00-8:00 AM: Testing Advanced

  • Integration testing
  • E2E testing setup
  • Visual regression testing

9:00-12:00 PM: Core Learning

  • Advanced Testing Strategies
    • Test-driven development
    • Behavior-driven development
    • Snapshot testing
    • Performance testing
    • Accessibility testing
    • Cross-browser testing

1:00-3:00 PM: Machine Coding

  • Build Kanban Board
    • Drag and drop between columns
    • Task creation and editing
    • Due dates and priorities
    • Search and filtering
    • Data persistence

7:00-8:00 PM: DevOps for Frontend

  • CI/CD pipelines
  • Deployment strategies

Day 23: Tuesday

6:00-7:00 AM: LeetCode Practice

  • #41 First Missing Positive (Hard)
  • #128 Longest Consecutive Sequence (Medium)
  • #287 Find the Duplicate Number (Medium)

7:00-8:00 AM: Build Tools

  • Webpack configuration
  • Vite setup and optimization
  • Rollup for libraries

9:00-12:00 PM: Core Learning

  • Build Tools & Optimization
    • Webpack advanced configuration
    • Vite setup and optimization
    • ESBuild integration
    • Bundle analysis tools
    • Hot module replacement
    • Development vs production builds

1:00-3:00 PM: Machine Coding

  • Build Code Editor
    • Syntax highlighting
    • Auto-completion
    • Error detection
    • Multiple tabs
    • Theme support

7:00-8:00 PM: Monitoring

  • Error tracking setup
  • Performance monitoring
  • User analytics

Day 24: Wednesday

6:00-7:00 AM: LeetCode Practice

  • #4 Median of Two Sorted Arrays (Hard)
  • #315 Count of Smaller Numbers After Self (Hard)
  • #493 Reverse Pairs (Hard)

7:00-8:00 AM: Accessibility

  • ARIA labels and roles
  • Keyboard navigation
  • Screen reader support

9:00-12:00 PM: Core Learning

  • Web Accessibility
    • WCAG guidelines
    • Semantic HTML importance
    • ARIA attributes and roles
    • Keyboard navigation patterns
    • Screen reader compatibility
    • Color contrast requirements
    • Focus management

1:00-3:00 PM: Machine Coding

  • Build Music Player
    • Audio controls
    • Playlist management
    • Visualizations
    • Shuffle and repeat
    • Offline support

7:00-8:00 PM: Mobile First

  • Responsive design principles
  • Touch interactions
  • Mobile performance

Day 25: Thursday

6:00-7:00 AM: LeetCode Practice

  • #32 Longest Valid Parentheses (Hard)
  • #10 Regular Expression Matching (Hard)
  • #44 Wildcard Pattern Matching (Hard)

7:00-8:00 AM: Internationalization

  • i18n implementation
  • RTL language support
  • Date/time localization

9:00-12:00 PM: Core Learning

  • Internationalization & Localization
    • i18n library implementation
    • Translation key management
    • Pluralization rules
    • RTL language support
    • Currency and date formatting
    • Dynamic language switching

1:00-3:00 PM: Machine Coding

  • Build Video Conference UI
    • Grid layout for participants
    • Screen sharing UI
    • Chat integration
    • Controls overlay
    • Mobile adaptation

7:00-8:00 PM: Design Systems

  • Component library creation
  • Design tokens
  • Documentation strategy

Day 26: Friday

6:00-7:00 AM: LeetCode Practice

  • #329 Longest Increasing Path in a Matrix (Hard)
  • #212 Word Search II (Hard)
  • #37 Sudoku Solver (Hard)

7:00-8:00 AM: Advanced Patterns

  • Observer pattern
  • Publisher-subscriber pattern
  • Command pattern

9:00-12:00 PM: Core Learning

  • Design Patterns in Frontend
    • Singleton pattern implementation
    • Observer pattern for events
    • Factory pattern for components
    • Module pattern for organization
    • MVC/MVP/MVVM patterns
    • Flux/Redux pattern

1:00-3:00 PM: Machine Coding

  • Build Calendar Component
    • Month/week/day views
    • Event creation and editing
    • Recurring events
    • Different calendars
    • Export functionality

7:00-8:00 PM: Month 1 Final Review

  • Complete skills assessment
  • Identify strengths and gaps

Day 27: Saturday

8:00-10:00 AM: LeetCode Marathon

  • #52 N-Queens II (Hard)
  • #37 Sudoku Solver (Hard)
  • #140 Word Break II (Hard)
  • #126 Word Ladder II (Hard)
  • #132 Palindrome Partitioning II (Hard)

10:00-12:00 PM: Portfolio Project

  • Build Full-Stack Social Media App Frontend
    • User authentication UI
    • Post creation and editing
    • News feed with infinite scroll
    • Real-time notifications
    • Search functionality

1:00-4:00 PM: System Design Practice

  • Design Twitter Frontend
    • Tweet composition
    • Timeline rendering
    • Real-time updates
    • Media handling
    • Performance optimization

4:00-6:00 PM: Mock Interview

  • Full technical interview simulation
  • Algorithm + System Design + Machine Coding
  • Behavioral questions

7:00-8:00 PM: Comprehensive Review

  • Month 1 complete assessment

Day 28: Sunday

8:00-10:00 AM: LeetCode Marathon

  • #472 Concatenated Words (Hard)
  • #123 Best Time to Buy and Sell Stock III (Hard)
  • #188 Best Time to Buy and Sell Stock IV (Hard)
  • #309 Best Time to Buy and Sell Stock with Cooldown (Medium)
  • #714 Best Time to Buy and Sell Stock with Transaction Fee (Medium)

10:00-12:00 PM: Portfolio Project Completion

  • Complete social media app
  • Add comprehensive testing
  • Performance optimization
  • Documentation

1:00-4:00 PM: Month 1 Integration

  • Combine all learned concepts
  • Create comprehensive demo
  • Performance benchmarking

4:00-6:00 PM: Gap Analysis

  • Identify weak areas
  • Plan Month 2 focus
  • Adjust study strategy

7:00-8:00 PM: Month 2 Planning

  • Set Month 2 goals
  • Plan advanced topics

MONTH 2: ADVANCED FRONTEND & SYSTEM DESIGN (Weeks 5-8)

Week 5: Advanced React Patterns & Hard Algorithms

Day 29: Monday

6:00-7:00 AM: LeetCode Practice

  • #1220 Count Vowels Permutation (Hard)
  • #1235 Maximum Profit in Job Scheduling (Hard)
  • #1402 Reducing Dishes (Hard)

7:00-8:00 AM: React 19 Deep Dive

  • Server Components architecture
  • use() hook patterns
  • Server Actions implementation

9:00-12:00 PM: Core Learning

  • React 19 Advanced Features
    • Server Components vs Client Components
    • Streaming with Suspense
    • use() hook for data fetching
    • Server Actions for forms
    • Concurrent features deep dive
    • Migration strategies

1:00-3:00 PM: Machine Coding

  • Build Advanced Search Interface
    • Multi-faceted search
    • Search suggestions with highlighting
    • Search history
    • Saved searches
    • Search analytics

7:00-8:00 PM: Concurrent React

  • useTransition and useDeferredValue
  • Concurrent rendering concepts
  • Priority-based updates

Day 30: Tuesday

6:00-7:00 AM: LeetCode Practice

  • #1335 Minimum Difficulty of a Job Schedule (Hard)
  • #1278 Palindrome Partitioning III (Hard)
  • #1312 Minimum Insertion Steps to Make a String Palindrome (Hard)

7:00-8:00 AM: State Management Advanced

  • Zustand advanced patterns
  • Redux Toolkit Query
  • State machines with XState

9:00-12:00 PM: Core Learning

  • Advanced State Management
    • Zustand with TypeScript
    • RTK Query advanced patterns
    • State machines with XState
    • Recoil for atomic state
    • SWR advanced features
    • State synchronization patterns

1:00-3:00 PM: Machine Coding

  • Build Advanced Data Grid
    • Virtual scrolling
    • Column resizing and reordering
    • Advanced filtering
    • Grouping and aggregation
    • Export to multiple formats

7:00-8:00 PM: Performance Patterns

  • Memoization strategies
  • Virtualization techniques
  • Bundle optimization

Day 31: Wednesday

6:00-7:00 AM: LeetCode Practice

  • #1187 Make Array Strictly Increasing (Hard)
  • #1547 Minimum Cost to Cut a Stick (Hard)
  • #1458 Max Dot Product of Two Subsequences (Hard)

7:00-8:00 AM: Micro-frontends

  • Module Federation setup
  • Independent deployments
  • Shared dependencies

9:00-12:00 PM: Core Learning

  • Micro-frontend Architecture
    • Module Federation with Webpack 5
    • Single-SPA framework
    • Independent team workflows
    • Shared component libraries
    • Cross-app communication
    • Deployment strategies

1:00-3:00 PM: Machine Coding

  • Build Collaborative Whiteboard
    • Real-time drawing
    • Shape tools
    • Text annotations
    • Collaboration cursors
    • Undo/redo system

7:00-8:00 PM: Architecture Patterns

  • Component composition
  • Inversion of control
  • Dependency injection

Day 32: Thursday

6:00-7:00 AM: LeetCode Practice

  • #1449 Form Largest Integer With Digits That Add up to Target (Hard)
  • #1494 Parallel Courses II (Hard)
  • #1595 Minimum Cost to Connect Two Groups of Points (Hard)

7:00-8:00 AM: Web Assembly

  • WASM basics
  • Integration with JavaScript
  • Performance benefits

9:00-12:00 PM: Core Learning

  • Web Assembly Integration
    • WASM module compilation
    • JavaScript and WASM communication
    • Performance optimization use cases
    • Rust/C++ to WASM
    • Memory management
    • Browser support considerations

1:00-3:00 PM: Machine Coding

  • Build Advanced Image Editor
    • Canvas manipulation
    • Filter effects
    • Layer management
    • History system
    • Export functionality

7:00-8:00 PM: WebGL Basics

  • Three.js fundamentals
  • 3D graphics in web
  • Performance considerations

Day 33: Friday

6:00-7:00 AM: LeetCode Practice

  • #1397 Find All Good Strings (Hard)
  • #1659 Maximize Grid Happiness (Hard)
  • #1681 Minimum Incompatibility (Hard)

7:00-8:00 AM: Advanced Testing

  • Visual regression testing
  • Performance testing
  • Cross-browser testing

9:00-12:00 PM: Core Learning

  • Advanced Testing Strategies
    • Storybook for component testing
    • Chromatic for visual testing
    • Percy for visual regression
    • WebPageTest integration
    • Lighthouse CI
    • Cross-browser testing tools

1:00-3:00 PM: Machine Coding

  • Build Advanced Chart Library
    • Multiple chart types
    • Interactive legends
    • Zoom and pan
    • Real-time data updates
    • Accessibility features

7:00-8:00 PM: Week Review

  • Advanced React patterns review
  • Performance optimization recap

Day 34: Saturday

8:00-10:00 AM: LeetCode Marathon

  • #664 Strange Printer (Hard)
  • #546 Remove Boxes (Hard)
  • #312 Burst Balloons (Hard)
  • #375 Guess Number Higher or Lower II (Medium)
  • #486 Predict the Winner (Medium)

10:00-12:00 PM: Portfolio Project

  • Build Advanced Portfolio Website
    • 3D elements with Three.js
    • Advanced animations
    • Dark/light theme
    • Performance optimized
    • SEO optimized

1:00-4:00 PM: System Design

  • Design Figma-like Design Tool
    • Canvas architecture
    • Real-time collaboration
    • Version control
    • Plugin system
    • Performance optimization

4:00-6:00 PM: Mock Interview

  • Advanced system design
  • Performance optimization
  • Architecture decisions

7:00-8:00 PM: Review & Planning

  • Week 5 comprehensive review

Day 35: Sunday

8:00-10:00 AM: LeetCode Marathon

  • #174 Dungeon Game (Hard)
  • #514 Freedom Trail (Hard)
  • #691 Stickers to Spell Word (Hard)
  • #741 Cherry Pickup (Hard)
  • #1463 Cherry Pickup II (Hard)

10:00-12:00 PM: Integration Project

  • Build Comprehensive CMS Frontend
    • Content management
    • Media library
    • User roles and permissions
    • SEO optimization
    • Performance monitoring

1:00-4:00 PM: Advanced Concepts

  • Edge Computing for Frontend
    • CDN optimization
    • Edge functions
    • Geo-distributed applications
    • Performance implications

4:00-6:00 PM: Practice Integration

  • Combine advanced patterns
  • Performance testing
  • Code review

7:00-8:00 PM: Week Planning

  • Plan Week 6 system design focus

Latest Interview Questions from 2025

Meta/Facebook Frontend Interview Questions (2025)

  • Machine Coding: Build Instagram story viewer with autoplay
  • System Design: Design Facebook news feed with real-time updates
  • React: Implement custom hooks for data fetching with caching
  • Performance: Optimize React app for Core Web Vitals
  • Algorithm: LeetCode Hard - Custom data structure for social graph

Google Frontend Interview Questions (2025)

  • Algorithm: Design and implement LRU cache with O(1) operations
  • System Design: Design Google Docs collaborative editing
  • Vanilla JS: Implement event delegation for dynamic content
  • Performance: Optimize page load time for image-heavy application
  • Security: Implement XSS prevention in rich text editor

Amazon Frontend Interview Questions (2025)

  • Machine Coding: Build Amazon product recommendation carousel
  • Leadership: Tell me about a time you had to make a trade-off between features and performance
  • Algorithm: Design autocomplete system for search suggestions
  • System Design: Design shopping cart with offline capability
  • Accessibility: Implement screen reader compatible data table

Recent Startup Interview Questions (2025)

  • Full-Stack: Build real-time chat with message status indicators
  • Performance: Implement virtual scrolling for 100k+ items
  • Modern Stack: Build SSR application with Next.js 14
  • State Management: Design global state for multi-tenant application
  • Testing: Write comprehensive tests for complex form validation

Daily Checklist Template

Morning Routine (6:00-8:00 AM)

  • LeetCode problems completed (mark difficulty)
  • Concepts reviewed and understood
  • Notes taken for future reference

Core Learning (9:00-12:00 PM)

  • All topics covered from daily plan
  • Hands-on coding practice completed
  • Documentation reviewed
  • Edge cases considered

Machine Coding (1:00-3:00 PM)

  • Component/feature fully implemented
  • Accessibility features included
  • Performance optimizations applied
  • Tests written and passing
  • Code reviewed and refactored

Evening Review (7:00-8:00 PM)

  • Daily concepts summarized
  • Weak areas identified
  • Next day preparation completed
  • Progress updated in tracking sheet

Weekend Integration

  • Weekly project completed
  • System design case study finished
  • Mock interview conducted
  • Week assessment completed
  • Next week planned

Monthly Assessment Checkpoints

Month 1 (JavaScript + React Fundamentals)

  • 100+ LeetCode problems solved (Easy: 30, Medium: 60, Hard: 10)
  • 20+ UI components built and deployed
  • 4 full applications completed
  • 8 system design case studies completed
  • 12 mock interviews conducted

Month 2 (Advanced Patterns + System Design)

  • 100+ LeetCode problems solved (Easy: 10, Medium: 50, Hard: 40)
  • 5+ advanced features implemented
  • 2 complex applications completed
  • 8 advanced system design studies
  • 16 mock interviews conducted

Final Success Metrics

  • 300+ LeetCode problems solved (mix of difficulties)
  • 50+ UI components in personal library
  • 10+ full applications in portfolio
  • 20+ system design case studies documented
  • 50+ mock interviews completed
  • 80%+ success rate in mock technical rounds

This intensive plan is designed to make you interview-ready for top-tier frontend engineering positions. Follow it religiously, track your progress daily, and adjust based on your strengths and weaknesses.

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    Frontend Engineering Technical Preparation Guide 2025 | Claude