React, Next.js and TypeScript engineeringSOC 2 Type II
ReactJS Development Company for Fast, Scalable Web Apps
SDLC Corp is a ReactJS development company that builds fast, accessible web apps with React, Next.js and TypeScript. We design component systems, connect your APIs and move legacy front ends to React. After launch, we keep your app tested, current and quick.
- SOC 2 Type II
- ISO 27001 Certified
- ISO 9001 Certified
- CMMI Level 3
- Projects delivered
- 3,400+
- Global engineers
- 1,200+
- Countries served
- 30+
- Years of delivery
- 10+
Trusted by teams at
Why React
A ReactJS Development Company for Front Ends That Last
React lets teams build a user interface from small, reusable parts. That makes it a strong fit for dashboards, portals, SaaS products and online stores. However, a React app can still turn slow and hard to change. It happens when state, data fetching and components grow without a plan.
As a ReactJS development company, we plan that structure before we write code. Designers, React engineers, backend developers and QA work in the same sprints. So you get one plan, one point of contact and a preview link you can click every sprint. Need the full product, back end included? See our full stack development company page.
- React and Next.js in TypeScript, with clear rules for state and data
- Shared component libraries that keep every screen consistent
- Speed, accessibility and tests checked in every pull request
Services
React Development Services From Our ReactJS Development Company
Start with one service, such as a design system or a migration. Or let our ReactJS development company take the full product, from first sketch to launch and beyond.
Custom React Web Apps
Dashboards, portals, SaaS products and internal tools built in React and TypeScript. We shape the app around your users and your rules.
Web app developmentNext.js Development
Server rendering, static pages and React Server Components for fast first loads. In turn, search engines can read every page.
Component Libraries and Design Systems
One shared set of tested, documented components in Storybook. As a result, new screens look the same and ship faster.
UI/UX designMigration to React
We move AngularJS, Angular, jQuery or server-rendered pages to React step by step, so users never face a risky big switch.
Legacy modernizationReact Performance Tuning
We find slow renders, heavy bundles and layout shifts. Then we fix them with code splitting, caching and leaner components.
API and Backend Integration
REST and GraphQL clients, auth, payments and live updates over WebSockets, wired into React with clean data hooks.
Backend developmentReact Native Touchpoints
Need a mobile app too? We share logic and design tokens between React on the web and React Native on phones.
Mobile app developmentTesting, Upgrades and Support
Unit, component and end-to-end tests, React version upgrades and fixes after launch. Your app stays secure and current.
Testing services
Technology
The React Stack We Build With
React is a library, so the choices around it decide how well an app ages. Pick an area to see where it fits and how our ReactJS development company uses it. Our patterns follow the official React documentation.
Rendering
Next.js App Router, SSR, SSG, ISR, React Server Components
- Where it fits
- Marketing sites, stores and content-heavy apps where first load and search visibility matter.
- How we build it
- We pick server, static or client rendering per route. That way, each page loads fast and stays fresh without extra cost.
TypeScript
TypeScript strict mode, typed API clients, Zod schemas
- Where it fits
- Any app that many developers will touch for years.
- How we build it
- We type props, API responses and forms end to end. As a result, many bugs surface in the editor instead of in production.
State and data
Redux Toolkit, Zustand, TanStack Query, Apollo Client, GraphQL
- Where it fits
- Apps with shared carts, filters, live data or complex forms.
- How we build it
- We keep server data in a query cache and only true app state in a store. This keeps components small and renders cheap.
UI and design systems
Storybook, Tailwind CSS, CSS Modules, MUI, Radix UI
- Where it fits
- Products with many screens, several teams or a brand to protect.
- How we build it
- We build tokens and base components first, then document them in Storybook. Next, every team reuses the same parts.
Performance
Code splitting, React.lazy, memoization, image and font loading
- Where it fits
- Apps that feel slow, fail Core Web Vitals or ship large bundles.
- How we build it
- We profile first, then fix the slowest paths. We also set a bundle budget in CI so the app stays quick after launch.
Testing and a11y
Jest, Vitest, React Testing Library, Playwright, axe
- Where it fits
- Teams that want to release often without breaking things.
- How we build it
- We test components the way users use them and run end-to-end flows in CI. We also check WCAG 2.2 contrast, focus and labels.
Build and release
Vite, Turborepo, GitHub Actions, Docker, AWS, Vercel
- Where it fits
- Teams that want preview links per pull request and calm releases.
- How we build it
- We automate builds, tests and previews for each change. Then we deploy with feature flags and quick rollbacks.
Our React toolkit
Core
- React
- Next.js
- TypeScript
- JavaScript (ES2023)
- Vite
State and data
- Redux Toolkit
- Zustand
- TanStack Query
- Apollo
- GraphQL
- REST
UI
- Storybook
- Tailwind CSS
- CSS Modules
- MUI
- Radix UI
- Framer Motion
Testing
- Jest
- Vitest
- React Testing Library
- Playwright
- Cypress
- axe
Backend pairing
- Node.js
- NestJS
- Python
- .NET
- PostgreSQL
- MongoDB
Cloud and CI
- AWS
- Azure
- Vercel
- Docker
- GitHub Actions
- Turborepo
Want an installable, offline-ready web app? See our progressive web app development page.
Why SDLC Corp
Why Choose Us as Your ReactJS Development Company
Many teams can write React. Fewer can keep a large React app fast, accessible and easy to change for years. That is the part we focus on.
Architecture first
We agree on folders, state rules and data flow before the first sprint. So the app stays easy to change as it grows.
Accessible by default
Keyboard paths, focus states, labels and contrast are part of each component. They are never a last-minute fix.
Secure delivery
We work under SOC 2 Type II, ISO 27001, ISO 9001 and CMMI Level 3 processes. Your data and code stay protected.
You own everything
The source code, the design files and the cloud accounts stay in your name. Even after the project ends, nothing is locked.
Progress you can click
Each pull request gets a preview link, and each sprint ends with a demo. You also get access to the board and the repo.
Kept current
We plan React and Next.js upgrades, patch packages and watch errors. Then we fix issues before your users notice.
Is your React app slow, fragile or stuck on an old version?
Share the repo or a demo link. In one call, a React lead will review it and suggest the next steps.
Process
How Our ReactJS Development Company Works
Every project follows the same six steps. As a result, you always know what we are building, what comes next and why.
- 01
Discovery and audit
We define users, goals and key flows. For an existing app, we also audit code, speed and accessibility.
- 02
UX and components
Next, we design flows in Figma and list the shared components. You can test a prototype before we code.
- 03
Architecture
We choose rendering, state, data fetching and folder rules. Then we set up CI, linting and preview links.
- 04
Build in sprints
We build in two-week sprints. After each one, you get a preview link and a short demo.
- 05
Test and harden
We run component, end-to-end and accessibility tests, then tune speed and fix the issues we find.
- 06
Launch and improve
We release with feature flags, watch errors and real user speed, and plan updates from feedback.
Engagement
Ways to Work With Our React Team
Pick the model that fits your stage. Our ReactJS development company also lets you switch later, for example from a fixed MVP to a dedicated team.
Fixed-scope project
Good fit for: New apps, MVPs and migrations with a clear scope
We agree on scope, milestones and price before work starts. Then we deliver in phases you can test.
MVP development- Most chosen
Dedicated React team
Good fit for: Products with a long roadmap
A full team of designers, React and backend engineers, QA and a project lead works only on your product.
Dedicated team model Hire React developers
Good fit for: In-house teams that need more React capacity
Add React and Next.js developers to your own team. They join your standups, tools and code review.
Hire developers
Proof
React Projects We Have Delivered
These projects show how our ReactJS development company works with product teams in very different fields. Each card links to the full case study.
- Education
University Event Platform
One platform for registration, room scheduling, hybrid streaming and QR check-in across six campuses, linked to the SIS and LMS.
Read the case study - Creator economy
Audience Pool UGC Marketplace
A web and mobile marketplace where brands buy creator content, with separate creator, brand and admin screens and wallet payouts.
Read the case study - Maritime
Port of Fujairah Anchorage System
A live web workspace for vessel requests, anchorage allocation, maps and alerts, built for port operators in the UAE.
Read the case study
Building an online store? Read how we built The Snus Life eCommerce platform with React.js and Node.js.
Client feedback
What Our Clients Say
Verified reviews from web and software projects, shown as published on Clutch.
- 5.0 on Clutch
What impressed us most about SDLC Corp was their ability to understand our clinical requirements.
Dr. Tannavi YadavCEO, Dental Care Center
Verified review on ClutchCustom Software Development for Dental Services Company
- 5.0 on Clutch
Their ability to complete the various stages of the project at specified timeframes has impressed us very much.
Sharad JainCofounder, Kahuna
Verified review on ClutchWeb & Mobile Dev for Cryptocurrency Platform
- 5.0 on Clutch
They've been guiding me through every step, and I am really happy about the work they've done.
Akash YadavManaging Director, Akash Consultancy
Verified review on ClutchCRM Dev & Web Redesign for Recruitment Firm
Industries
React Apps for Every Kind of Business
Each sector brings its own rules, data and user habits. These are the areas where our ReactJS development company works most often. For store builds, see our ecommerce development page.
SaaS and B2B platforms
Multi-tenant dashboards, role-based screens, billing pages and admin panels.
Fintech and banking
Secure portals, live charts, onboarding flows and clear screens for balances and payments.
Retail and ecommerce
Fast storefronts with Next.js, smart search, saved carts and headless commerce links.
Healthcare
Patient and staff portals with strict access rules, built for HIPAA requirements when needed.
Education and e-learning
Course players, quizzes, event booking and accessible layouts for every student.
Logistics and ports
Live maps, tracking boards and alerts that update over WebSockets without page reloads.
Media and creators
Content feeds, marketplaces, uploads and subscriptions with fast, smooth scrolling.
Enterprise and internal tools
Staff apps with single sign-on, complex forms and data grids that stay quick.
Buying guide
Choosing a ReactJS Development Company: Cost and Key Questions
No two React apps cost the same, so a fair quote starts with scope. These six factors shape the budget and the timeline. Not sure React is the right fit? Our software consulting team can help you compare options.
- 1
Screens and user roles
First, the number of flows, roles and screens sets most of the design and build effort.
- 2
Rendering needs
A Next.js site with server rendering and SEO needs differs from a private dashboard behind a login.
- 3
Data and integrations
New APIs, live updates, payments or links to your CRM or ERP add work beyond the UI.
- 4
Design system
A shared component library costs more at the start but saves time on every later screen.
- 5
Migration scope
Moving from AngularJS or jQuery depends on how much code, test cover and business logic exist.
- 6
Support after launch
Finally, upgrades, monitoring and new features form an ongoing budget line.
FAQs
ReactJS Development Company FAQs
Clear answers to what founders, CTOs and product owners ask us most about React, cost, timelines and ownership.
Ask Your Own QuestionWhat does a ReactJS development company do?
A ReactJS development company plans, designs, builds, tests and supports web apps made with React. At SDLC Corp, that also covers Next.js, TypeScript, design systems, API work and migrations. You work with one team from idea to release.
Should I use React or Next.js for my project?
Next.js is a framework built on React. Choose it when you need server rendering, static pages or strong SEO, such as for a store or a content site. Plain React with Vite can suit a private dashboard behind a login. We help you choose after a short review.
Is React better than Angular or Vue?
Each one can work well. React offers a huge ecosystem, flexible patterns and an easy path to React Native for mobile. Angular gives more built-in structure, and Vue is light and simple to learn. We look at your team, your app and your roadmap before we recommend one.
Can you migrate my AngularJS or jQuery app to React?
Yes. We usually migrate step by step, one route or widget at a time, so the old and new code run side by side. This keeps the app live and lowers risk. We add tests as we go, so each step is safe to release.
How long does it take to build a React app?
It depends on scope. A focused MVP takes far less time than a full product with many roles, integrations and a design system. After discovery, we share a phased timeline, and you get a preview link every sprint.
How much does ReactJS development cost?
Cost depends on screens, rendering needs, integrations, the design system, migration scope and support. After a short call, we send a scope and an estimate, so you can see what each phase includes.
Can I hire dedicated React developers?
Yes. Our ReactJS development company lets you hire React and Next.js developers for your team, or take a full dedicated team with a project lead and QA. Both models give you full control of priorities and code.
Who owns the code and the design files?
You do. The repository, the design files and the cloud accounts stay in your name, and you get full documentation. We can also sign an NDA before we see your idea.
How do you keep React apps fast?
We profile renders and bundles, split code by route, cache server data and load images and fonts with care. We also track Core Web Vitals after launch, so speed does not slip as features grow.
What support do you offer after launch?
We fix bugs, patch packages, plan React and Next.js upgrades and ship new features. In addition, we watch errors and real user speed, so issues get fixed before users report them.
Start with a free estimate
Ready to Work With a ReactJS Development Company That Ships?
Tell us about your idea or your current React app. After one short call, you will get a clear scope, a phased plan and an estimate.
- Free consultation
- NDA on request
- You own the code
Contact Us
Share a few details about your project, and we’ll get back to you soon.
Let's Talk About Your Project
- Free Consultation
- Support options based on your engagement
- Agreed delivery milestones
- sales@sdlccorp.com
- +1(510-630-6507)