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Sachin Kasana

Principal Engineer by day, DevTools builder by night 🌙 | Love working with Node.js, React & AI | Sharing insights on clean code, performance, and web development. https://json-formatter-dev.vercel.ap

Location india Joined Joined on  Personal website https://sachinkasana-dev.vercel.app/ github website twitter website

Education

MCA

Work

Full-stack Developer | Principal Engineer

I Stopped Using Online Diff Checkers and JWT Tools Blindly. Here’s Why I Built My Own
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I Stopped Using Online Diff Checkers and JWT Tools Blindly. Here’s Why I Built My Own

#webdev #programming #devtool #productivity
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2 min read

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Production-Grade System Design in Node.js (2025): 20 Concepts Every Developer Should Master
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Production-Grade System Design in Node.js (2025): 20 Concepts Every Developer Should Master

#systemdesignconcepts #backenddevelopment #javascripttips #bestpractices
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1 min read
13 Modern Node.js Features That Made Popular npm Packages Obsolete (with Real Use Cases)
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13 Modern Node.js Features That Made Popular npm Packages Obsolete (with Real Use Cases)

#javascript #bestpractices #backenddevelopment #softwareengineering
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1 min read
️ 10 Node.js Security Best Practices You Shouldn’t Ignore in 2025
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️ 10 Node.js Security Best Practices You Shouldn’t Ignore in 2025

#softwaresecurity #node #security #backend
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1 min read
Production-Grade Node.js Permission Model: Lock Down Your Runtime
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Production-Grade Node.js Permission Model: Lock Down Your Runtime

#javascriptdevelopmen #javascripttips #backendsecurity #node
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1 min read
Node.js 24 vs 22 in 2025: What’s New, What Breaks, and How to Upgrade Safely
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Node.js 24 vs 22 in 2025: What’s New, What Breaks, and How to Upgrade Safely

#node #upgradesandmigration #backenddevelopment #bestpractices
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1 min read
Retry Logic in Node.js: How to Handle Flaky APIs Without Losing Your Mind
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Retry Logic in Node.js: How to Handle Flaky APIs Without Losing Your Mind

#bestpractices #backend #javascripttips #optmization
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2 min read
REST vs GraphQL vs OData — Choosing the Right API for the Right Job
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REST vs GraphQL vs OData — Choosing the Right API for the Right Job

#architecture #graphql #odata #restapi
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3 min read
I Replaced My Spinner with a Skeleton — And My UX Skyrocketed
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I Replaced My Spinner with a Skeleton — And My UX Skyrocketed

#webdev #performancemanagemen #javascriptdevelopmen #uxdesign
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3 min read
Stop Using Switch Statements — Use a Lookup Object Instead
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Stop Using Switch Statements — Use a Lookup Object Instead

#webdev #cleancode #javascript #codingpatterns
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3 min read
How Node.js Handles High Concurrency Without Threads (And Why It Still Blocks Sometimes)
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How Node.js Handles High Concurrency Without Threads (And Why It Still Blocks Sometimes)

#programming #performance #node #optimization
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4 min read
How Web Workers Saved My JavaScript App from Freezing on Every CSV Upload
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How Web Workers Saved My JavaScript App from Freezing on Every CSV Upload

#webdev #webworker #optimization #performance
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3 min read
Most people think lazy loading is always good.
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Most people think lazy loading is always good.

#performance #react #javascript
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1 min read
Avoid These Lazy Loading Mistakes That Could Slow Down Your Website (with Real Fixes)
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Avoid These Lazy Loading Mistakes That Could Slow Down Your Website (with Real Fixes)

#javascript #react #bestpractices #performance
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3 min read
Dockerizing Node.js for Developers (Not DevOps)
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Dockerizing Node.js for Developers (Not DevOps)

#devopstool #node #javascript #dockerimage
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2 min read
SOLID Principles in JavaScript & TypeScript — Real-World Examples You Can Actually Use
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SOLID Principles in JavaScript & TypeScript — Real-World Examples You Can Actually Use

#architecture #javascript #designpatterns #soliddesignprinciple
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4 min read
10 Node.js Best Practices I Wish I Knew Sooner
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10 Node.js Best Practices I Wish I Knew Sooner

#performance #javascript #programming #bestpractices
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4 min read
I Built a Free JSON Formatter & Viewer for Developers — Feedback Welcome!
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I Built a Free JSON Formatter & Viewer for Developers — Feedback Welcome!

#webdev #devtools #productivity
2
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1 min read
Design Patterns in JavaScript — Part 4: The Adapter Pattern
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Design Patterns in JavaScript — Part 4: The Adapter Pattern

#programming #cleancode #designpatterns #javascript
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2 min read
️‍️ Design Patterns in JavaScript — Part 3: The Observer Pattern
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️‍️ Design Patterns in JavaScript — Part 3: The Observer Pattern

#javascript #architecture #designpatterns #programming
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2 min read
Design Patterns in JavaScript — Part 2: The Factory Pattern
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Design Patterns in JavaScript — Part 2: The Factory Pattern

#architecture #designpatterns #cleancode #javascript
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2 min read
Design Patterns in JavaScript — Part 1: Singleton & Module (With Real Examples)
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Design Patterns in JavaScript — Part 1: Singleton & Module (With Real Examples)

#designpatterns #javascript #architecture #cleancode
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3 min read
How to Monitor Frontend Errors Like a Backend Pro
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How to Monitor Frontend Errors Like a Backend Pro

#sentry #observability #frontend #javascript
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3 min read
⚡ From 5s to 500ms: How I Reduced My Page Load with Real Metrics
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⚡ From 5s to 500ms: How I Reduced My Page Load with Real Metrics

#corewebvitals #webperf #pagespeed #frontendperformance
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2 min read
10x Your App’s Speed: Migrate to the New Node.js and Unlock Performance Features
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10x Your App’s Speed: Migrate to the New Node.js and Unlock Performance Features

#javascriptperformanc #nodejsdevelopment #performance #backend
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3 min read
From 10 Seconds to 2: Real Techniques for Reducing Load Times with Practical Examples
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From 10 Seconds to 2: Real Techniques for Reducing Load Times with Practical Examples

#webperf #weboptimization #sitespeed #optimization
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2 min read
Mastering Web Rendering: Choosing the Right Strategy for Your Site’s Speed and SEO
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Mastering Web Rendering: Choosing the Right Strategy for Your Site’s Speed and SEO

#javascriptdevelopmen #webrendering #javascript #rendering
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5 min read
Node.js Array Limits: What’s the Maximum Length You Can Reach?
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Node.js Array Limits: What’s the Maximum Length You Can Reach?

#javascriptdevelopmen #javascript #node #nodejsdevelopment
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2 min read
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