Sachin's DevLog

Sachin's DevLog

Reflections on engineering, product design, and the architecture of the web.

The Future of CSS: StyleX, Tailwind v4, and Zero-Runtime CSS-in-JS

Web EngineeringFeatured

The Future of CSS: StyleX, Tailwind v4, and Zero-Runtime CSS-in-JS

CSS-in-JS is great for DX but terrible for performance. Tailwind is fast but ugly. In this 4,000-word analysis, we explore the new wave of 'Zero-Runtime' libraries like StyleX and Panda CSS.

Feb 15, 2026•20 min read

Sachin

Sachin SharmaFeb 14

System Design: Architecting a Real-Time Collaboration Engine (Like Figma)

Searching for 'How to build Figma' only gives you 'Use Socket.io'. This 4,800-word guide goes deeper. We implement CRDTs (Yjs/Automerge), WebSocket scaling strategies, and handle the 'CAP Theorem' in production.

System Design30 min read

System Design: Architecting a Real-Time Collaboration Engine (Like Figma)

Sachin

Sachin SharmaFeb 12

Mobile DevOps at Scale: Automating Flutter Releases with Fastlane & GitHub Actions

Stop manually archiving Xcode builds. In this 5,000-word handbook, we build a complete CI/CD pipeline that runs tests, signs binaries, and uploads to the App Store and Play Store on every git tag.

DevOps35 min read

Mobile DevOps at Scale: Automating Flutter Releases with Fastlane & GitHub Actions

Sachin

Sachin SharmaFeb 10

Mastering tRPC: End-to-End Type Safety Without GraphQL

REST is loose. GraphQL is verbose. tRPC is the future. In this 4,000-word guide, we build a monorepo where changing a database column instantly breaks the frontend build.

Web Engineering22 min read

Mastering tRPC: End-to-End Type Safety Without GraphQL

Sachin

Sachin SharmaFeb 8

Running Llama 3 on Mobile: The Ultimate Guide to Local LLMs with Flutter

The future of AI is offline. In this 4,500-word tutorial, we compile Llama 3 to run on iOS and Android using MLC LLM and Flutter. We benchmark token speed, memory usage, and battery drain.

Mobile Engineering32 min read

Running Llama 3 on Mobile: The Ultimate Guide to Local LLMs with Flutter

Sachin

Sachin SharmaFeb 5

The Era of Edge Databases: Building Global Apps with Turso and Cloudflare D1

Latency is the new downtime. In this 4,200-word guide, we explore how to move your database to the Edge using SQLite, LibSQL, and Cloudflare Workers. Learn about replication, consistency models, and how to query your DB in 10ms from anywhere in the world.

System Design25 min read

The Era of Edge Databases: Building Global Apps with Turso and Cloudflare D1

Sachin

Sachin SharmaFeb 3

React Server Components: The Mental Model Shift for Senior Engineers

The line between Frontend and Backend has vanished. In this 4,000-word analysis, we deconstruct RSCs, Streaming, Suspense, and the 'Waterfalls' problem. Learn how to architect Next.js apps without client-side bloat.

Web Engineering24 min read

React Server Components: The Mental Model Shift for Senior Engineers

Sachin

Sachin SharmaFeb 1

Bun 1.2 vs Node.js 24 vs Deno 2.0: The 2026 Production Benchmark

The JavaScript runtime wars are over. Or are they? In this exhaustive 5,000-word benchmark, we test HTTP throughput, WebSocket latency, Cold Start times, and SQLite performance across the big three.

Backend Engineering26 min read

Bun 1.2 vs Node.js 24 vs Deno 2.0: The 2026 Production Benchmark

Sachin

Sachin SharmaJan 28

WebGPU: The Death of WebGL? A High-Performance Compute Guide

The browser is no longer single-threaded. With WebGPU, we can access the raw power of the GPU for general-purpose computing. In this 4,200-word deep dive, we build a fluid simulation in the browser using WGSL.

Web Engineering28 min read

WebGPU: The Death of WebGL? A High-Performance Compute Guide

Sachin

Sachin SharmaJan 25

The Rise of AI Agents: Building Autonomous Workflows with LangGraph

Chatbots are dead. Long live Agents. In this 4,500-word deep dive, we explore the shift from 'RAG' to 'Agentic Workflows'. Learn how to build self-correcting, tool-using, and stateful AI agents using LangGraph and Next.js.

AI Engineering30 min read

The Rise of AI Agents: Building Autonomous Workflows with LangGraph

Sachin

Sachin SharmaJan 22

The Definitive Guide to SEO for Next.js Developers

Don't leave your ranking to chance. This 3,500-word masterclass covers advanced SEO, AEO (AI Engine Optimization), and GEO (Generative Engine Optimization) specifically for Next.js engineers.

Web Engineering22 min read

The Definitive Guide to SEO for Next.js Developers

Sachin

Sachin SharmaJan 20

Flutter Performance Optimization: The Ultimate 60 FPS Guide

Is your Flutter app dropping frames? This 4,000-word masterclass covers everything from RepaintBoundaries and Isolate management to the internal workings of the Impeller engine.

Mobile Engineering28 min read

Flutter Performance Optimization: The Ultimate 60 FPS Guide

Sachin

Sachin SharmaJan 18

The Tech Stack Behind MojoDocs: Scaling to 10k Users

Building a document platform is easy. Building a high-performance, private, and scalable document platform is a battle. Here is the 3,500-word engineering breakdown of MojoDocs.

System Design24 min read

The Tech Stack Behind MojoDocs: Scaling to 10k Users

Sachin

Sachin SharmaJan 15

Hiring a Flutter Developer in 2026? Here Are 5 Red Flags to Watch For

The market is flooded with 'Flutter Developers,' but few are Engineers. If you are a founder or recruiter, this 3,000-word guide will help you spot the red flags that lead to expensive technical debt and failed launches.

Leadership & Business18 min read

Hiring a Flutter Developer in 2026? Here Are 5 Red Flags to Watch For

Sachin

Sachin SharmaJan 12

Why I Switched from Freelancing to Full-Time Engineering (And What I Learned)

The freelance life promises freedom, but enterprise engineering delivers scale. Here is my 3,500-word deep-dive into why I moved from 'hired gun' to 'product owner' and how it changed my technical perspective.

Career & Mindset22 min read

Why I Switched from Freelancing to Full-Time Engineering (And What I Learned)

Sachin

Sachin SharmaJan 10

Top 5 Open Source Flutter Libraries I Use in Every Project (2026 Edition)

Don't reinvent the wheel. After shipping 50+ apps, I've consolidated my 'Standard Library' of Flutter packages that guarantee performance, scalability, and developer happiness. Here is the deep-dive.

Mobile Engineering25 min read

Top 5 Open Source Flutter Libraries I Use in Every Project (2026 Edition)

Sachin

Sachin SharmaJan 7

Building a PDF Compressor in the Browser: WebAssembly & Next.js

Why process sensitive documents on a server when you can do it in the browser? Dive into this 3,500-word masterclass on porting C++ libraries to WebAssembly and building a high-performance, private PDF compressor with Next.js.

Web Engineering20 min read

Building a PDF Compressor in the Browser: WebAssembly & Next.js

Sachin

Sachin SharmaJan 5

Next.js 14 Server Actions vs API Routes: Benchmarking Performance

Are Server Actions just hype? We benchmarked 10k requests on Vercel Edge. The results reveal a 40% reduction in cold starts and a massive shift in how we handle data mutations.

Web Performance14 min read

Next.js 14 Server Actions vs API Routes: Benchmarking Performance

Sachin

Sachin SharmaJan 3

Replacing Redux with Riverpod: A Practical Migration Guide (with Code)

Buried under Redux boilerplate? This guide walks through migrating a production Flutter app from Redux to Riverpod. Cut your codebase by 40% and gain compile-time safety.

State Management12 min read

Replacing Redux with Riverpod: A Practical Migration Guide (with Code)

Sachin

Sachin SharmaJan 1

How to Build a Production-Ready Flutter App: The Complete Architecture Guide

Stop building spaghetti code. This 3,000-word guide dissects the exact Scalable Architecture I use for enterprise Flutter apps. Learn Clean Architecture, Riverpod, Freezed, and Folder Structure.

Mobile Engineering15 min read

How to Build a Production-Ready Flutter App: The Complete Architecture Guide