DEV Community: Mahinur Rahman

Introducing Kiro – An Agentic AI IDE That Thinks Like a Developer

Mahinur Rahman — Wed, 16 Jul 2025 19:54:05 +0000

👋 Hey folks,

I'm Sarvar, a Cloud Architect with a strong background in AWS, Azure, DevOps, DataOps, and Generative AI. Over the years, I've had the opportunity to design and deliver scalable, cloud-native solutions that solve real-world business problems. This article kicks off a series where I explore the intersection of AI and developer productivity — starting with an exciting new tool from AWS: Kiro.

🚀 What Is Kiro?

Kiro is an experimental, AI-powered IDE by AWS — but it's not just another autocomplete assistant. It's agentic, meaning it doesn't just generate code line-by-line. Instead, Kiro understands your goals, analyzes your codebase, and autonomously makes decisions — much like a junior engineer on your team.

Kiro is built to work alongside you:

Understanding your intent
Navigating and modifying files
Explaining existing code
Debugging intelligently
Executing complex tasks step-by-step

🧠 Kiro vs GitHub Copilot

While GitHub Copilot focuses on token-level predictions (autocomplete), Kiro takes it several steps further.

Feature	GitHub Copilot	Kiro
Code Completion	✅	✅
Multi-file Understanding	❌	✅
Goal-Oriented Tasks	❌	✅
Debugging & Error Tracing	❌	✅
Agentic Reasoning	❌	✅
Transparent Edits	❌	✅

Kiro is not just reactive — it’s proactive. It reasons through your request, plans its actions, and applies changes with transparency.

🛠️ What Can Kiro Do?

Here are a few standout capabilities:

🔧 Code Generation & Refactoring: Write, refactor, or extend code across multiple files.
🧩 Architecture Explanation: Get high-level overviews or function-level insights.
🐞 Debug with Context: Paste logs or error messages and Kiro will trace the root cause.
🎨 Frontend & Backend Edits: Modify UI logic, APIs, or business logic in one go.
🔁 Follow-up Tasks: Chain tasks naturally like a conversation.
🧠 Integrate Open-Source Agents: Extend Kiro using the MCP protocol.

🔍 Under the Hood – How Kiro Works

Kiro is designed around a few core principles:

Agentic Reasoning Loop: It plans, acts, evaluates, and iterates intelligently.
Local Context Awareness: Tightly integrates with your dev environment via MCP and LSP.
Privacy & Security First: All actions are local by default — no code is shared externally unless you choose to.
Amazon Q Integration: Kiro supports Amazon Q CLI and custom servers for even more advanced analysis.

💡 Why Developers Should Care

Modern dev work is full of context-switching — reading docs, jumping between files, and deciphering legacy code. Kiro reduces that mental load and keeps you focused on the “what”, not the “how”.

Perfect for:

🧭 Navigating large monorepos
⚙️ Automating routine tasks
🚀 Onboarding into unfamiliar codebases
✅ Reviewing changes before applying

⚠️ Limitations (for Now)

Kiro is currently in preview. Here’s what to know:

🧪 Still experimental
🖥️ Requires setup via MCP environment
🐍 Supports Python and JavaScript, more languages on the way
🔐 Only works locally (great for security-conscious devs)

🛠️ Getting Started with Kiro

⚙️ Setup steps below are for Windows, but similar for macOS and Linux.

1. Download the Installer

Visit the official Kiro page
Choose your OS and download the installer
Run and complete the setup

2. Sign In with AWS Builder ID

Launch Kiro
Choose AWS Builder ID to sign in
Unlock Amazon Q integration for enhanced AI assistance

3. Link to Your Local Project

Connect Kiro to your local repo
Let it scan the codebase and start delegating tasks like:
- Add login functionality
- Fix bug in productController
- Explain data flow in cart module

📌 Final Thoughts

Kiro is a paradigm shift — from AI as a helper to AI as a teammate.

Whether you're building features, fixing bugs, or understanding legacy systems, Kiro accelerates your work while keeping you in control. It’s still early, but the potential is game-changing for developer workflows.

Give it a spin, and let me know what use cases excite you the most! 🙌

📫 Follow me for more deep dives into AWS, AI, and cloud-native development. Let’s build the future together.

Build a Lightning-Fast Design System in React with Tailwind CSS & ShadCN/UI

Mahinur Rahman — Tue, 15 Jul 2025 10:58:04 +0000

⚡ Build a Lightning-Fast Design System in React with Tailwind CSS & ShadCN/UI

Creating beautiful, consistent, and reusable components shouldn't be a headache. That’s why we’re combining React, Tailwind CSS, and the rising star ShadCN/UI to build a blazing-fast, customizable design system.

Whether you're creating a startup UI kit or a scalable design language for enterprise, this guide will walk you through how to set it up, scale it, and make it shine.

📦 Why ShadCN/UI?

ShadCN/UI is a beautiful, accessible component library built on:

React + Tailwind CSS
Radix UI (headless primitives)
Lucide Icons
Tailwind Variants for dynamic class management

Think of it as Tailwind + Radix + Magic Sauce. You get full control of styling without sacrificing accessibility or flexibility.

🛠️ Project Setup (Vite + Tailwind + ShadCN)

Let’s create the base of our design system.

1. Create the Project

npm create vite@latest my-ui-kit --template react
cd my-ui-kit
npm install

2. Install Tailwind CSS

npm install -D tailwindcss postcss autoprefixer
npx tailwindcss init -p

Update your tailwind.config.js and index.css:

// tailwind.config.js
content: ["./index.html", "./src/**/*.{js,ts,jsx,tsx}"],
theme: {
  extend: {},
},
plugins: [],

/* index.css */
@tailwind base;
@tailwind components;
@tailwind utilities;

3. Install ShadCN/UI

npx shadcn-ui@latest init

Pick your theme and options. It sets up:

components/ui
tailwind.config.ts with custom plugins
@/lib/utils.ts for class merging
Everything you need for atomic components!

🧱 Building the System

Let’s go through how to build your own design system on top of ShadCN.

🧩 1. Atoms – Smallest UI units

Start with base components like Button, Input, Badge.

// components/ui/button.tsx (Already provided by ShadCN)
<Button variant="outline" size="sm">Click Me</Button>

You can create your own:

// components/ui/text.tsx
export function Text({ children }: { children: React.ReactNode }) {
  return <p className="text-sm text-muted-foreground">{children}</p>;
}

🧱 2. Molecules – Composed Components

These are combinations of atoms: Card, FormField, NavbarItem.

// components/shared/ProfileCard.tsx
import { Avatar, AvatarImage } from "@/components/ui/avatar";

export default function ProfileCard({ user }) {
  return (
    <div className="flex gap-4 items-center p-4 rounded-xl border shadow-sm">
      <Avatar>
        <AvatarImage src={user.image} />
      </Avatar>
      <div>
        <h2 className="text-lg font-semibold">{user.name}</h2>
        <p className="text-sm text-muted-foreground">{user.role}</p>
      </div>
    </div>
  );
}

🏗️ 3. Organisms – Larger UI Sections

These are fully functional sections like navbars, sidebars, dashboards.

// components/layout/Navbar.tsx
import { Button } from "@/components/ui/button";

export function Navbar() {
  return (
    <header className="w-full px-6 py-4 flex justify-between items-center shadow-sm border-b">
      <h1 className="font-bold text-xl">MyApp</h1>
      <Button variant="ghost">Logout</Button>
    </header>
  );
}

🧠 Tip: Use Tailwind Variants to Create Themes

ShadCN uses tailwind-variants to dynamically generate variants without manually writing clsx().

import { cva } from "class-variance-authority";

const alert = cva("rounded-md border p-4", {
  variants: {
    variant: {
      default: "bg-background text-foreground",
      error: "bg-red-50 text-red-900",
    },
  },
  defaultVariants: {
    variant: "default",
  },
});

export function Alert({ variant, children }) {
  return <div className={alert({ variant })}>{children}</div>;
}

🌐 Theming the Whole System

In tailwind.config.ts, you can fully customize your design tokens:

theme: {
  extend: {
    colors: {
      brand: {
        DEFAULT: '#6366f1', // Indigo
        light: '#a5b4fc',
        dark: '#4338ca',
      }
    }
  }
}

You can use your custom color:

<Button className="bg-brand text-white hover:bg-brand-dark">Click</Button>

📚 Docs & Storybook Integration

Want to take your design system to the next level?

Add Storybook to preview and test components in isolation.
Use MDX files to document use cases.
Export reusable props and theming tokens to design-tokens.json.

🧪 Testing Components

Install @testing-library/react:

npm install --save-dev @testing-library/react

Example test:

import { render, screen } from "@testing-library/react";
import { Button } from "@/components/ui/button";

test("renders the button", () => {
  render(<Button>Click Me</Button>);
  expect(screen.getByText("Click Me")).toBeInTheDocument();
});

🔚 Wrapping Up

With React + Tailwind CSS + ShadCN, you can:

✅ Build accessible, themeable, and composable components

✅ Create a lightning-fast design system from scratch

✅ Scale with confidence in teams or solo dev mode

✅ Make beautiful UIs without getting stuck in CSS hell

💬 What’s Next?

Planning to build a full design system?

✨ Want to open-source your UI kit?

Have a cool ShadCN-based design system? Drop the repo below!👇

📌 Follow for more frontend and design system magic!

React Performance Optimization: From Slow to Lightning Fast

Mahinur Rahman — Tue, 15 Jul 2025 10:47:15 +0000

🚀 React Performance Optimization: From Slow to Lightning Fast

React is fast — but it can feel slow if we’re not careful. As applications scale, so do the risks of poor rendering performance, bloated bundles, and unnecessary re-renders.

In this post, we’ll go from sluggish to lightning fast by mastering memoization, lazy loading, and bundle splitting — powerful techniques to supercharge your React apps. Let’s dive in!

💡 1. Memoization: Stop Unnecessary Re-renders

React components re-render more often than you think. Sometimes, that’s harmless — but when large trees or expensive calculations are involved, it can become a major bottleneck.

✅ Use `React.memo` for Functional Components

Wrap functional components with React.memo to prevent re-renders if props haven’t changed:

const ExpensiveComponent = React.memo(({ data }) => {
  // Only re-renders when 'data' changes
  return <div>{data}</div>;
});

✅ Use `useMemo` for Expensive Computations

const sortedData = useMemo(() => {
  return heavySortFunction(data);
}, [data]);

✅ Use `useCallback` to Memoize Functions

const handleClick = useCallback(() => {
  doSomething();
}, []);

⚠️ Tip: Use memoization wisely. Overusing useMemo or useCallback for cheap calculations can hurt performance.

💤 2. Lazy Loading: Load Only What’s Needed

Why load your entire app upfront when users may only visit one or two pages?

✅ Code-Splitting with `React.lazy` + `Suspense`

import React, { Suspense } from 'react';

const AboutPage = React.lazy(() => import('./AboutPage'));

function App() {
  return (
    <Suspense fallback={<div>Loading...</div>}>
      <AboutPage />
    </Suspense>
  );
}

This delays loading the AboutPage component until it's actually rendered, reducing initial bundle size.

📦 3. Bundle Splitting: Break the Monolith

Bundle splitting separates your code into smaller chunks that can be loaded on demand.

✅ Use `react-router` + Lazy Loading

import { BrowserRouter, Routes, Route } from 'react-router-dom';
const Home = lazy(() => import('./pages/Home'));
const Dashboard = lazy(() => import('./pages/Dashboard'));

<BrowserRouter>
  <Suspense fallback={<div>Loading route...</div>}>
    <Routes>
      <Route path="/" element={<Home />} />
      <Route path="/dashboard" element={<Dashboard />} />
    </Routes>
  </Suspense>
</BrowserRouter>

Use tools like Webpack, Vite, or Parcel to enable automatic bundle splitting.

🛠 Bonus Tips for Performance Wins

✅ Use production builds (npm run build) to enable React’s optimizations.
✅ Avoid anonymous functions inside render().
✅ Throttle/debounce input events (e.g., scroll, resize).
✅ Virtualize long lists with libraries like react-window or react-virtualized.
✅ Avoid unnecessary context updates — use selectors or memoized providers.

📈 Tools to Measure Performance

React DevTools Profiler – inspect component render times.
Lighthouse – audit performance, accessibility, and more.
Web Vitals – track real-world performance metrics (FCP, LCP, TTI).

⚡ Final Thoughts

Performance is a feature — and in a world where users expect instant gratification, a fast app can mean higher engagement and conversions.

By applying memoization, lazy loading, and bundle splitting, you’ll significantly improve your React app’s speed and responsiveness.

🧠 Have you used any of these techniques in your projects? Got a favorite tip? Share it in the comments!

Follow me on Dev.to for more web dev insights! 💙
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