Logeshwaran, Author at CheatCoders

React Performance Optimization: Every Technique From memo to Virtualization

React apps slow down for predictable reasons: unnecessary re-renders, missing memoization, unvirtualized long lists, and oversized bundles. Every technique to fix them — with when to use each.

System Design

Go Concurrency Patterns: Goroutines, Channels, and the Patterns Senior Engineers Use

Go concurrency is powerful and dangerous in equal measure. These goroutine and channel patterns — worker pools, fan-out/fan-in, context cancellation, errgroup — are what senior Go engineers actually use in production.

JavaScript

JavaScript Async/Await: Every Pattern, Pitfall, and Performance Trick

Async/await looks simple but hides deadly traps — sequential execution when you meant parallel, uncaught rejections, missing AbortController, await in forEach. Every pattern and pitfall covered.

Debugging

SQL Query Optimization: 15 Techniques That Turn Slow Queries Into Fast Ones

These 15 SQL optimization techniques are the difference between a 30-second report and a 200ms one — from reading EXPLAIN ANALYZE to covering indexes to replacing self-joins with window functions.

Python

Python Performance Secrets: 20 Techniques to Make Your Code 10x Faster

Python is slow only when you write it slowly. These 20 production-tested techniques make your Python code dramatically faster — from profiling to vectorization to multiprocessing.

AWS

How Netflix Handles 250M Users: Event-Driven Video Processing Architecture on AWS

How a Netflix-scale platform handles video upload, transcoding, metadata management, and global delivery for 250 million users using event-driven AWS architecture — full production breakdown with data flow, scaling strategy, and cost optimization.

AWS

How to Build a Real-Time Fraud Detection and Decisioning Architecture on AWS with EventBridge, Step Functions, and DynamoDB

Build a real-time fraud detection architecture on AWS with Lambda, DynamoDB, Redis, Step Functions, EventBridge, and S3-backed audit trails.

AWS

AWS Clickstream Analytics at Massive Scale: Kinesis, Lambda, Firehose, S3, Athena, and OpenSearch in Production

Learn a production AWS clickstream analytics architecture using Kinesis, Firehose, S3, Glue, Athena, and OpenSearch at massive scale.

AWS

Production-Grade Multi-Region E-Commerce Checkout on AWS with Aurora Global Database, EventBridge, and SQS

Design a resilient AWS checkout architecture with Aurora Global Database, ECS, Step Functions, EventBridge, and SQS for production e-commerce.

AWS

Designing an Active-Active Global Collaboration Platform on AWS with API Gateway, EKS, DynamoDB Global Tables, and EventBridge

Design an active-active collaboration platform on AWS with EKS, API Gateway, Route 53, Redis, EventBridge, SQS, and DynamoDB global tables.