🚀 Frontend DSA Master Roadmap

Build With Kiran

Kiran Kumar P · Senior Frontend / Full-Stack Developer

Complete Data Structures & Algorithms syllabus in JavaScript + TypeScript, designed specifically for Frontend Engineers targeting product companies, FAANG, and AI-based interviews.

Level 0 — Programming Foundations

JavaScript Core
Scopes, Hoisting, Closures, this, Call/Apply/Bind, Prototypes

Async JS
Event Loop, Promises, Async/Await, Microtasks, Web APIs

TypeScript
Types, Interfaces, Generics, Enums, Utility Types

OOP
Classes, Inheritance, Polymorphism, Composition

Big-O
Time, Space, Amortized Complexity

Recursion Basics
Stack Frames, Tail Recursion

Level 1 — Arrays & Math

Traversal, Rotation, Sorting, Searching

Prefix Sum, Difference Array

Two Pointer Technique

Sliding Window (fixed & dynamic)

Kadane’s Algorithm

Binary Search Variants

Math: GCD, LCM, Modulo, Powers

Bitwise Basics

Level 2 — Strings & Hashing

Character Frequency Maps

Anagram Detection

Palindrome Techniques

Substring Search

Rolling Hash

Rabin-Karp

Set Operations

Custom HashMap Design

Level 3 — Recursion & Backtracking

Subsets & Power Sets

Permutations

Combinations

N-Queens

Sudoku Solver

Maze Problems

Decision Trees

Level 4 — Linked Lists

Singly & Doubly Linked List

Fast/Slow Pointer

Cycle Detection

Reverse in Groups

Merge Sorted Lists

LRU Cache Base

Level 5 — Stack & Queue

Array & Linked Stack

Infix/Postfix

Monotonic Stack

Undo/Redo Systems

Circular Queue

Deque

Sliding Window Maximum

Level 6 — Trees & Tries

Binary Tree Traversals

Height, Diameter

Balanced Trees

BST Insert/Delete

Kth Smallest

Trie Auto-Suggest

DOM Tree Traversal

Level 7 — Heap & Priority Queue

Min/Max Heap

Top-K Elements

Median from Stream

Task Scheduling

Merge K Lists

Level 8 — Graphs

Adjacency List/Matrix

BFS / DFS

Cycle Detection

Topological Sort

Dijkstra

Union-Find

Dependency Graphs

Level 9 — Greedy Algorithms

Activity Selection

Interval Scheduling

Jump Game

Huffman Coding

Fractional Knapsack

Level 10 — Dynamic Programming

Memoization vs Tabulation

0/1 Knapsack

LCS / LIS

Grid DP

Partition DP

DP on Trees

Bitmask DP

Level 11 — Advanced Algorithms

KMP Pattern Search

Manacher’s Algorithm

Segment Tree

Fenwick Tree

Mo’s Algorithm

A* Pathfinding

Level 12 — Frontend System DSA

Virtual DOM Diffing

LRU Cache Design

Debounce & Throttle

Search Auto-Complete

Infinite Scroll Buffer

Drag-Drop Reordering

Undo/Redo Architecture

State Normalization