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Performance is the concern that separates production-quality React code from tutorial-grade code. Most React applications do not have a rendering problem — but...

Introduction In a surprising twist of fate, the world of spirits and science have found Tito's Handmade Vodka, founded by Tito Beveridge in Austin, Texas, has a...

Small infrastructure decisions that quietly turn into large cloud bills In theory, this should make infrastructure both predictable and efficient. In practice,...

Vấn đề muôn thuở của Rails dưới tải cao Bạn có một Rails API. Mọi thứ chạy tốt ở môi trường dev, production cũng ổn ở lượng traffic vừa phải. Rồi một ngày đẹp t...

I Asked OpenClaw to Summarize a File. It Tried to Steal My Credentials Instead. I tested indirect prompt injection against OpenClaw 2026.3.13 with Gemini 2.0 Fl...

Automated Accessibility Testing API: Run WCAG 2.1 Audits Programmatically Accessibility testing is broken. Teams run desktop tools axe DevTools, WAVE. Get resul...

If you've ever tried generating PDFs in Flutter, you know it can get messy fast — coordinates, layouts, rendering issues 😵‍💫 But what if building PDFs felt ju...

Your local LLM is smart but blind — it can't see the internet. Here's how to give it eyes, a filter, and a citation engine. This is a hands-on tutorial. We'll i...

When users share links in your React app, showing a rich preview — title, description, image — makes the experience feel polished and professional. Think Slack,...

I recently needed to add a LinkedIn feed on a website I was working on. Sounds simple, right? Turns out… not really. LinkedIn doesn’t offer a proper native widg...

Three months ago I started an experiment. I wore a sleep-tracking wearable to bed every night and kept a handwritten sleep diary on my nightstand. I logged when...

Over the past four years I have sat on the hiring side of the table for three different tech companies. I have personally reviewed somewhere north of 500 resume...

I remember the first time I compared my salary offer letter to my actual direct deposit. The offer said $75,000. My bank account said something very different....

Previous articles: P2P For Web Devs, Prologue: Why should I care? P2P For Web Devs, Part 1: Networking dht-rpc dht-rpc is a Kademlia based DHT implementation. Q...

The Problem Clerk handles authentication beautifully, but your app logic lives in Supabase. Every time a user signs up or updates their profile, you need a corr...

For years, software engineering had a clear hierarchy. The best developers were often the ones who: wrote the cleanest code mastered complex frameworks optimise...

Debugging Professionalism: 7 Behavioral Patterns That Reveal the Source Code In software architecture, we don't just trust the dashboard; we look at the logs. I...

URL: https://isaacfei.com/posts/building-ai-apps-with-go Date: 2026-03-15 Tags: Go, AI, LangChain Description: Hands-on exploration of building AI applications...

Developer productivity isn't about working faster — it's about eliminating friction. Every context switch, every manual task, every slow feedback loop compounds...

The JavaScript build tool landscape has undergone a seismic shift. For nearly a decade, Webpack dominated frontend tooling — bundling everything from React apps...

URL: https://isaacfei.com/posts/making-your-blog-ai-readable Date: 2026-03-15 Tags: Astro, AI, llms-txt Description: A practical guide to implementing the llms....

Have you ever tried to build a link preview card—like the ones you see in Discord, Twitter, or Slack—only to be instantly blocked by CORS errors? If you try to...

CloudDev v0.2.0 is here! 🎉 Following the success of v0.1.0, I've released CloudDev v0.2.0 📣 SNS — pub/sub with SQS delivery 🔐 Secrets Manager — local secret...

URL: https://isaacfei.com/posts/deploy-tanstack-start-neon-cloudflare Date: 2026-02-23 Tags: TanStack Start, Cloudflare Workers, Neon, Drizzle ORM, Deployment D...

URL: https://isaacfei.com/posts/editor-autosave-tanstack-start Date: 2026-02-23 Tags: TanStack Start, React, TanStack Query, Auto-save, Editor Description: Buil...

URL: https://isaacfei.com/posts/cmsketch-py-cpp Date: 2025-09-13 Tags: Python, C++, pybind11, CMake, Data Structures Description: Learn how to develop Python pa...

What Is OAuth 2.0? OAuth 2.0 is the industry-standard authorization framework that enables third-party applications to obtain limited access to a user's resourc...

Every phase of learning teaches us something new — but one realization keeps repeating itself: What we learn in theory is often very different from what we expe...

Problem Statement Given an unsorted array containing both positive and negative integers, rearrange the array such that all negative elements are moved to the...

Quick Update Heatmap Bot v1.2.0 has been released. Main Change – Automated Ko‑fi Activation Previous flow 1. Customer pays on Ko‑fi. 2. I receive an email noti...

The Client Nick runs a non‑medical personal care agency serving 8 cities in the Dallas‑Fort Worth area. He had no website, no online presence, and was competin...

Building a Secure GCP Foundation: An AWS Engineer's First Lab I have two AWS certifications and essentially zero GCP experience. I set a constraint for myself:...

!Cover image for Rotifer v0.3: TypeScript WASM — Zero-Barrier Gene Authoringhttps://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,for...

Problem Statement Given an array of numbers, we need to find the smallest minimum and largest maximum elements. Example Input: 1, 4, 3, 5, 8, 6 Output: 1, 8 Ap...

markdown !Cover image for The Coordination Problem Nobody Talks About When You Give AI Agents Real Workhttps://media2.dev.to/dynamic/image/width=1000,height=420...

Porting Test Drive II from SNES to PC, Part 5: Making generated evidence intentional The next cleanup problem in this repo was not glamorous. It was git status...

markdown !Takashi Abehttps://media2.dev.to/dynamic/image/width=50,height=50,fit=cover,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fu...

When I was a boy, I sold Scout‑O‑Rama tickets. The math was simple: knock on more doors, get more sales, win a bigger prize. Selling software isn’t that differe...

What is Razorpay Route? Razorpay Route is a feature provided by Razorpay that enables the splitting of incoming funds among different sellers, vendors, third p...

What is Rate Limiting? Why it matters It protects your API from: - Brute‑force attacks - DDoS attempts - API abuse Example Express.js javascript import express...

'The Developer's Guide to In‑Flight Internet Tracking Starlink Aviation Deployment Across Airlines

!Cover image for I burned $250 in tokens on day one with OpenClaw. Here's why.https://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,f...

Background I frequently handle site migrations and move large media files. My previous workflow was inefficient: download a huge zip from an FTP server often t...

Tiny CLI Tools That Save You Minutes Every Day Every developer has their toolkit—VS Code, Git, maybe a fancy terminal. But the best productivity gains come fro...

Introduction I've spent over a dozen years experimenting with Python in environments where it traditionally doesn't belong. From mobile app tooling to interact...

!Cover image for Top 5 File Sharing Mistakes Remote Teams Make And How to Fix Themhttps://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=au...

Introduction: Why Signal Matters Signal is one of the most trusted messaging platforms in the world, boasting over 40 million monthly active users who choose i...

One Agent or Many? This Choice Changes Everything 🤔🤖🤖 When teams start building agentic systems, a key question appears early: Should we build one powerful...