Blogs
Technical articles, backend guides, SaaS architecture notes, and DSA interview prep
Featured Articles
Learning Paths
Backend Development Complete Guide
Comprehensive 31-article series covering backend development from fundamentals to production systems
DSA Interview Playbook
A structured DSA roadmap covering arrays, linked lists, stacks, queues, trees, graphs, dynamic programming, greedy, and advanced patterns
Backend Development
Getting Started
High-Level Understanding of Backend and Frontend
Learn the fundamental differences between frontend and backend development
HTTP Protocol
Understanding the protocol that powers web communication
Routing
How backend servers decide which code to run for a given URL
Serialization and Deserialization
Converting data between formats for storage and transmission
Authentication and Authorization
Securing your applications with proper auth mechanisms
Validation and Transformation
Ensuring data integrity and proper formatting
Architecture and Design
Middlewares
Building modular request processing pipelines
Request Context
Managing context across request lifecycles
Handlers, Controllers, and Services
Organizing your application logic
CRUD Deep Dive
Mastering create, read, update, delete operations
RESTful Architecture and Best Practices
Building scalable REST APIs
Business Logic Layer (BLL)
Separating business rules from data access
Advanced Topics
Database Basics, Schema Design, Performance, and PostgreSQL Deep Dive
Everything you need to know about databases
Caching
Improving performance with caching strategies
Transactional Emails
Handling email communications reliably
Task Queuing and Scheduling
Processing background jobs efficiently
Full Text Search and Elasticsearch
Implementing powerful search functionality
Error Handling
Graceful error management in production systems
Production and Operations
Config Management
Managing application configuration across environments
Logging, Monitoring, and Observability
Understanding your system in production
Graceful Shutdown
Ensuring clean application shutdown
Security
Comprehensive security practices for backend systems
Scaling and Performance
Techniques for scaling your applications
Concurrency and Parallelism
Handling multiple operations efficiently
Specialized Topics
Object Storage and Large Files
Handling file uploads and storage
Real-Time Backend Systems
Building real-time features with WebSockets
Testing and Code Quality
Ensuring reliability through testing
12-Factor App
Building cloud-native applications
OpenAPI Standards and Tools
Documenting and standardizing your APIs
Webhooks
Implementing event-driven integrations
DevOps for Backend Engineers
Modern DevOps practices for backend development
DSA Interview Prep
Topic Collections
Arrays and Binary Search
Two pointers, sliding windows, prefix sums, Kadane, and the binary search family
Linked List Patterns
Reverse, merge, fast-slow pointers, nth-from-end, k-group reversal, and random pointers
Stack, Queue, and Heap Patterns
Valid parentheses, monotonic stack, BFS, deque patterns, heaps, top-k, and LRU thinking
Recursion, Backtracking, and Trees
Subsets, permutations, N-Queens, traversals, diameter, LCA, serialization, and BSTs
Graphs and Union-Find
DFS, cycle detection, topological sort, bipartite graphs, Dijkstra, Bellman-Ford, Kruskal, and Prim
Dynamic Programming and Greedy
Fibonacci, knapsack, LIS, LCS, grids, trees, interval scheduling, and jump game
Advanced Strings, Bits, Math, and Range Queries
KMP, Z algorithm, XOR tricks, sieve, fast power, segment tree, and Fenwick tree
Arrays and Binary Search
Two Pointer
Interview guide for Two Pointer with intuition, dry run, C++ code, complexity, and practice problems
Sliding Window
Interview guide for Sliding Window with intuition, dry run, C++ code, complexity, and practice problems
Prefix Sum
Interview guide for Prefix Sum with intuition, dry run, C++ code, complexity, and practice problems
Kadane's Algorithm
Interview guide for Kadane's Algorithm with intuition, dry run, C++ code, complexity, and practice problems
Binary Search
Interview guide for Binary Search with intuition, dry run, C++ code, complexity, and practice problems
Linked List Patterns
Reverse Linked List
Interview guide for Reverse Linked List with intuition, dry run, C++ code, complexity, and practice problems
Fast & Slow Pointer
Interview guide for Fast & Slow Pointer with intuition, dry run, C++ code, complexity, and practice problems
Merge Two Sorted Lists
Interview guide for Merge Two Sorted Lists with intuition, dry run, C++ code, complexity, and practice problems
Remove Nth Node from End
Interview guide for Remove Nth Node from End with intuition, dry run, C++ code, complexity, and practice problems
Reverse in K Groups
Interview guide for Reverse in K Groups with intuition, dry run, C++ code, complexity, and practice problems
Clone Linked List With Random Pointer
Interview guide for Clone Linked List With Random Pointer with intuition, dry run, C++ code, complexity, and practice problems
Stack, Queue, and Heap Patterns
Valid Parentheses
Interview guide for Valid Parentheses with intuition, dry run, C++ code, complexity, and practice problems
Monotonic Stack
Interview guide for Monotonic Stack with intuition, dry run, C++ code, complexity, and practice problems
Largest Rectangle in Histogram
Interview guide for Largest Rectangle in Histogram with intuition, dry run, C++ code, complexity, and practice problems
BFS
Interview guide for BFS with intuition, dry run, C++ code, complexity, and practice problems
Sliding Window Maximum (Deque)
Interview guide for Sliding Window Maximum (Deque) with intuition, dry run, C++ code, complexity, and practice problems
Heap Toolkit
Interview guide for Heap Toolkit with intuition, dry run, C++ code, complexity, and practice problems
LRU Cache
Interview guide for LRU Cache with intuition, dry run, C++ code, complexity, and practice problems
Recursion, Backtracking, and Trees
Basic Recursion
Interview guide for Basic Recursion with intuition, dry run, C++ code, complexity, and practice problems
Backtracking Toolkit
Interview guide for Backtracking Toolkit with intuition, dry run, C++ code, complexity, and practice problems
N-Queens
Interview guide for N-Queens with intuition, dry run, C++ code, complexity, and practice problems
Tree Traversal Toolkit
Interview guide for Tree Traversal Toolkit with intuition, dry run, C++ code, complexity, and practice problems
Height, Diameter, Balanced Tree, and Path Sum
Interview guide for Height, Diameter, Balanced Tree, and Path Sum with intuition, dry run, C++ code, complexity, and practice problems
Lowest Common Ancestor
Interview guide for Lowest Common Ancestor with intuition, dry run, C++ code, complexity, and practice problems
Serialize / Deserialize and BST Toolkit
Interview guide for Serialize / Deserialize and BST Toolkit with intuition, dry run, C++ code, complexity, and practice problems
Graphs and Union-Find
DFS and Connected Components
Interview guide for DFS and Connected Components with intuition, dry run, C++ code, complexity, and practice problems
Cycle Detection and Bipartite Graph
Interview guide for Cycle Detection and Bipartite Graph with intuition, dry run, C++ code, complexity, and practice problems
Topological Sort
Interview guide for Topological Sort with intuition, dry run, C++ code, complexity, and practice problems
Dijkstra
Interview guide for Dijkstra with intuition, dry run, C++ code, complexity, and practice problems
Bellman-Ford
Interview guide for Bellman-Ford with intuition, dry run, C++ code, complexity, and practice problems
Union-Find, Kruskal, and Prim
Interview guide for Union-Find, Kruskal, and Prim with intuition, dry run, C++ code, complexity, and practice problems
Dynamic Programming and Greedy
Fibonacci-Style DP
Interview guide for Fibonacci-Style DP with intuition, dry run, C++ code, complexity, and practice problems
0/1 Knapsack and Unbounded Knapsack
Interview guide for 0/1 Knapsack and Unbounded Knapsack with intuition, dry run, C++ code, complexity, and practice problems
LIS
Interview guide for LIS with intuition, dry run, C++ code, complexity, and practice problems
LCS and DP on Strings
Interview guide for LCS and DP on Strings with intuition, dry run, C++ code, complexity, and practice problems
DP on Grids and Trees
Interview guide for DP on Grids and Trees with intuition, dry run, C++ code, complexity, and practice problems
Greedy Toolkit
Interview guide for Greedy Toolkit with intuition, dry run, C++ code, complexity, and practice problems
Advanced Toolkit
String Matching Toolkit
Interview guide for KMP, Z algorithm, Rabin-Karp, and Manacher's algorithm
Bit Manipulation
Interview guide for XOR tricks, bitmasking, and subset generation using bits
Mathematics Toolkit
Interview guide for GCD, sieve of Eratosthenes, and fast exponentiation
Range Query Data Structures
Interview guide for segment trees and Fenwick trees for range queries and updates