System Design Interview: Ticketing System (Ticketmaster)
9 min read Ticketmaster sells 500M+ tickets per year. A Taylor Swift tour launch can generate 3.5 billion system requests in a single […] Read article
System Design
System Design
System Design Interview: Fraud Detection System
8 min read Payment fraud costs $32 billion annually. Every payment processor, bank, and marketplace needs a fraud detection system that identifies fraudulent Read article
Algorithms
Java Interview Questions: JVM Internals, Concurrency, and Design Patterns (2025)
9 min read Senior Java interviews at Google, Amazon, LinkedIn, and enterprise shops go deep on JVM internals, concurrency, and the language semantics Read article
System Design
System Design Interview: E-Commerce Platform (Amazon)
9 min read Amazon processes 100K+ orders per minute on Prime Day. Designing an e-commerce platform covers product catalog management, inventory at scale, Read article
Algorithms
C# Interview Questions: .NET, LINQ, async/await, and Memory Management (2025)
8 min read C# is the dominant language at Microsoft, enterprise .NET shops, Unity game studios, and fintech companies running on Windows infrastructure. Read article
System Design
System Design Interview: Code Repository and CI/CD (GitHub / GitLab)
9 min read GitHub hosts 300M repositories and processes 2B+ Git operations daily. Designing a code hosting platform combines distributed storage (Git objects), Read article
Algorithms
Bit Manipulation Interview Patterns: A Complete Guide (2025)
8 min read Bit manipulation problems appear at Google, Meta, and Amazon interviews. They test low-level reasoning and often offer O(1) space solutions Read article
Algorithms
Graph Interview Patterns: A Complete Guide (2025)
8 min read Graph problems appear in every serious technical interview. They cover a wide range of difficulty — from simple BFS/DFS traversal Read article
System Design
System Design Interview: Music Streaming Service (Spotify)
8 min read Spotify serves 600M users, 100M tracks, and 9M daily podcast episodes. Designing a music streaming service covers audio delivery, catalog Read article
Algorithms
Trie Interview Patterns: A Complete Guide (2025)
9 min read A trie (prefix tree) is a tree where each node represents a character and the path from root to a Read article
System Design
System Design Interview: Distributed Task Queue (Celery / SQS / Sidekiq)
9 min read A distributed task queue decouples work production from work execution. Instead of processing a request synchronously (blocking the HTTP response), Read article
Algorithms
Backtracking Interview Patterns: A Complete Guide (2025)
8 min read Backtracking is systematic trial and error — explore a decision tree, and when you reach a dead end, undo the Read article
System Design
System Design Interview: Microservices Architecture Patterns
9 min read Monolith vs Microservices A monolith deploys all application functionality as one unit. Simple to develop initially, but becomes harder to Read article
Algorithms
Two Pointers Interview Patterns: A Complete Guide (2025)
8 min read Two Pointers Fundamentals Two pointers use two indices traversing an array or string to solve problems in O(n) that would Read article
System Design
System Design Interview: Data Pipeline and ETL System (Airflow / Spark)
8 min read What Is a Data Pipeline? A data pipeline moves and transforms data from source systems (databases, APIs, event streams) to Read article