React JS Development
A React JS development company builds interactive web apps using React, a JavaScript library from Meta that renders fast, component-based user interfaces. I'm Amit Kumar, founder of Cyber Defence and a CEH + CRTA certified developer based in Hisar, Haryana. I build React apps for clients across India — dashboards, SaaS front-ends, and single-page apps that stay fast as they grow. This page explains what I build, real pricing, and when React is the right choice.
Last updated: 2026-07-08 · Written by Amit Kumar (CEH, CRTA), Cyber Defence, Hisar
What React JS Actually Is
React is an open-source JavaScript library maintained by Meta for building user interfaces from small, reusable pieces called components. Instead of reloading a whole page, React updates only the part of the screen that changed using a virtual DOM, which makes apps feel instant. It powers Facebook, Instagram, Netflix, and thousands of production dashboards. React is not a full framework — it handles the view layer, and you add routing, data-fetching, and build tooling around it. That flexibility is a strength for custom apps and a reason many teams pair it with Next.js. When a client tells me they want a highly interactive interface — filters that update live, drag-and-drop, real-time charts, a logged-in app rather than a brochure site — React is usually the honest answer. For simple content sites I'll say so and suggest something lighter, because using React where it isn't needed just adds cost and build complexity.
What I Build With React
Most of my React work falls into a few buckets. Single-page applications (SPAs) — admin panels, internal tools, and customer dashboards where users spend real time and expect app-like speed. SaaS front-ends that talk to a REST or GraphQL API, with authentication, role-based access, and billing screens. Interactive product pages and configurators where users change options and see results update instantly. And component libraries — a shared set of buttons, forms, and cards so a growing product stays visually consistent. I build with modern React: functional components, hooks, and TypeScript for type safety so bugs surface at build time instead of in production. State is handled with the right tool for the job — React Context or Zustand for most apps, Redux Toolkit only when the data genuinely warrants it. Every build ships responsive, tested on real phones, and structured so another developer can pick it up later without a rewrite.
The Stack And How I Work
My default React stack is React 18 with TypeScript, Vite for fast builds, and Tailwind CSS for styling that stays maintainable. For data I use React Query (TanStack Query) to cache API calls and keep the UI in sync without hand-written loading spinners everywhere. Forms use React Hook Form for validation that doesn't slow typing. I connect to whatever backend fits — a Node.js API I build, or your existing Django, Laravel, or Firebase. Testing is Vitest and React Testing Library for the logic that matters, so refactors don't silently break features. Everything lives in Git with clear commits, and I deploy to Vercel, Netlify, or your own server with CI so a push becomes a live build safely. I care about performance budgets: code-splitting, lazy-loading routes, and keeping the JavaScript bundle small, because a React app that ships 3 MB of script feels slower than the plain HTML site it replaced.
React vs Next.js — When Each Wins
This is the question I answer most, so here's the honest version. Use plain React (a client-side SPA) when the app lives behind a login and SEO doesn't matter — internal dashboards, admin tools, SaaS app screens. Nobody Googles your billing page, so server rendering adds complexity you don't need. Use Next.js when the pages need to rank on Google or load instantly on first visit — marketing sites, blogs, e-commerce, and public product pages — because Next.js renders HTML on the server so search engines and users see content immediately. Next.js is built on React, so it's not React versus something alien; it's React with server rendering, routing, and image optimisation added. React vs Angular is a different axis: Angular is a full, opinionated framework good for large enterprise teams that want everything decided for them; React is lighter and more flexible, which suits most Indian startups and SMEs moving fast. I'll recommend whichever actually fits your project, not whichever bills more.
React JS Development Pricing (India)
I keep pricing transparent because most agencies hide it, and that's exactly why clients feel burned. The table below shows real India-market ranges for React work. A small SPA — a dashboard or internal tool with a handful of screens — typically runs ₹40,000 to ₹90,000. A mid-size SaaS front-end with auth, multiple modules, and API integration lands around ₹1,00,000 to ₹2,50,000. Large, ongoing products are better billed monthly. What moves the number is scope, not vanity: how many screens, how custom the design, how many third-party integrations, and whether you need TypeScript and a test suite (I recommend both). I quote a fixed price after a short scoping call so there are no mid-project surprises, and I break payments into milestones tied to working deliverables. If a template or a lighter tool would serve you better and cheaper, I'll tell you before you spend.
Why Work With Me
You deal with me directly — Amit Kumar, the person writing the code — not an account manager relaying messages to an offshore team. I'm CEH and CRTA certified, which means security isn't an afterthought: I sanitise inputs, protect API keys, and handle auth properly, because I've spent years on the offensive side seeing how sloppy front-ends get breached. I run Cyber Defence from Hisar, Haryana, and serve clients across India remotely, with the same care whether you're in Delhi, Bengaluru, or a tier-3 town. I write clean, documented, TypeScript React that the next developer can read, so you're never locked into me. And I'm honest about fit — if React is overkill for your project I'll say so. My work also trains real developers through Cyber Defence's academy, so the standards I hold my code to are the ones I teach.
How A Project Runs
Every React project follows the same clear path so you always know where things stand. First a scoping call — we list the screens, the data, and the integrations, and I give you a fixed quote and timeline. Then design or wireframes, so we agree on how it looks before code is written. I build in short, visible increments and share a live staging link early, so you see progress every week instead of waiting months for a big reveal. You test on real devices and send feedback; I fold it in. Before launch I run a performance and security pass — bundle size, accessibility, input handling, and API security — then deploy to your hosting with CI so future updates are safe. After launch I hand over the Git repo, documentation, and a walkthrough, and I offer a support window for fixes. A typical small SPA takes 2 to 4 weeks; larger SaaS front-ends run 6 to 12 weeks depending on scope.
React JS Development Pricing (India)
| Package | Best For | Typical Price (INR) | Timeline |
|---|---|---|---|
| Small SPA / Dashboard | Internal tool, admin panel, single-page app | ₹40,000 – ₹90,000 | 2–4 weeks |
| SaaS Front-End | Auth, multiple modules, API integration | ₹1,00,000 – ₹2,50,000 | 6–12 weeks |
| Component Library | Reusable design system for a growing product | ₹60,000 – ₹1,50,000 | 3–6 weeks |
| React + Node Full Stack | Front-end plus custom Node.js backend | ₹1,80,000 – ₹4,00,000 | 8–14 weeks |
| Monthly Retainer | Ongoing features, fixes, and maintenance | ₹25,000 – ₹80,000 / month | Ongoing |
Frequently Asked Questions
What does React JS development cost in India?
A small React single-page app or dashboard typically costs ₹40,000 to ₹90,000 in India. A mid-size SaaS front-end with authentication and API integration runs ₹1,00,000 to ₹2,50,000. Price depends on the number of screens, design complexity, and integrations. I quote a fixed price after a scoping call, with milestone payments and no hidden charges.
How long does it take to build a React app?
A small React SPA or dashboard usually takes 2 to 4 weeks. A mid-size SaaS front-end with multiple modules, authentication, and API work takes 6 to 12 weeks. Timeline depends on scope, design readiness, and how fast feedback comes back. I share a live staging link early so you see weekly progress rather than waiting for one big reveal.
Is React good for SEO?
Plain client-side React is weak for SEO because it ships an empty HTML page and renders content in the browser, which search engines and social previews may not see fully. If SEO matters, I build with Next.js instead — it's React with server-side rendering, so Google gets complete HTML on first load. For logged-in apps where SEO is irrelevant, plain React is perfectly fine.
React vs Next.js — which should I choose?
Choose plain React for apps behind a login where SEO doesn't matter — dashboards, admin panels, SaaS screens. Choose Next.js for anything that must rank on Google or load instantly on first visit — marketing sites, blogs, e-commerce, and public pages. Next.js is built on React, so it's not a rival; it's React plus server rendering. I'll recommend the one that fits your project.
Should I use React or Angular?
React is lighter and more flexible, which suits most Indian startups and SMEs that need to move fast and keep the stack simple. Angular is a full, opinionated framework better suited to large enterprise teams that want structure enforced for them. For most custom web apps I build with React because it's faster to iterate and easier to hire for later.
Do you use TypeScript with React?
Yes, by default. TypeScript catches whole categories of bugs at build time instead of in production, and it makes the code far easier for another developer to read and extend safely. For anything beyond a tiny prototype I strongly recommend it. It costs a little more upfront and saves far more in avoided bugs and future rework.
Can you connect a React front-end to my existing backend?
Yes. React is just the view layer, so it connects to almost any backend through a REST or GraphQL API — Node.js, Django, Laravel, Firebase, or your existing system. I've integrated React with all of these. If you don't have a backend yet, I can build one in Node.js as part of the same project so everything fits together cleanly.
Will I be locked into you after the project?
No. I write clean, documented, standard React and TypeScript, and I hand over the full Git repository, documentation, and a walkthrough at the end. Any competent React developer can pick it up and continue. I'd rather earn your repeat work by being good than trap you with code only I can read. Vendor lock-in is a red flag, not a business model.
Kya aap chhote business ke liye React app banate hain?
Haan, bilkul. Main chhote aur medium business ke liye React apps banata hoon — dashboards, internal tools, aur SaaS front-ends — poore India mein remotely. Pricing transparent hai aur fixed quote pehle milta hai. Agar aapke project ke liye React zaroori nahi hai to main saaf bata dunga, taaki aapka paisa waste na ho. Call ya WhatsApp karein 75175 72000.
Do you offer support after the React app launches?
Yes. Every project includes a post-launch support window for bug fixes, and I offer ongoing maintenance or feature work on a monthly basis if you want it. You get the Git repo and documentation regardless, so you're never dependent on me — but most clients keep me on for updates because I already know the codebase inside out.
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