React Web App Development

Develop fast performing web apps using React

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Not only does Callstack have tremendously talented engineers, but I know they care about the success of the project as much as I do. Having a true partner is a wonderful experience and gives us the ability to move so much faster than we could without them

TC Davis

What is React.js?

React.js is an open-source JavaScript library used for building user interfaces for single-page apps. It’s used to create view layers for web and mobile apps and allows developers to create reusable UI components.

How does it work?

React.js is an open-source JavaScript library used for building user interfaces for single-page apps. React is used to create view layers for web and mobile apps. The library allows developers to create reusable UI components.


React Web apps are built of reusable components. The first thing to do is to create such components or use existing ones.


The reusable components are combined to create the desired screens of the app.


When the previous steps are completed, after joining all the screens by navigation, the app is ready to deploy.

When to use React?

Dashboards or data presenting tools
Ecommerce or retail apps
Cross-platform mobile apps

Who uses React Web App Development

Faster start-up time. Better UX.
Improved accessibility. Faster performance. Better interactivity.

Improved performance.
Smoother and more satisfying booking experience.

Immediate page loading (even on slower connections). Offline capabilities. Push notifications.

Improved performance of the app.
Zero unnecessary data serialization.

Benefits of building a web app with React

What kind of technological advantages does React app development have to offer?

Reusable components

Reuse once created components to build multiple UI instances

One-way data flow

Ensure stable code with the one-way data flow

Virtual DOM

Update changes faster without memory waste

Zero dependencies

Fix and configure the technology stack to the product’s needs

Convert to mobile

Share functionalities between the web and mobile versions of the app

What can you gain with React Web App Development?

Examples of our clients whom we provided react web app dev services

The scalable and clutter-free education platform
Outcomes and business benefits:

Better user experience thanks to the easier process of creating and editing Schemes of Work. 

More approachable and simpler way teachers can manage their schedules. 

+60k of active teachers

The app is trusted by 80% of secondary schools in UK.

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Business benefits

Less time spent on coding, maintaining, and managing apps
Easier planning and debugging process
Better performance and user experience

Why partner with

On the market since 2016

Official Facebook partners

Core Contributors to React Native

Proud member of React Native community

Owners and maintainers of popular Open Source projects

Experienced in working with a wide range of clients, from startups to enterprises

How do we work?

We offer flexible solutions adjusted to your needs. Our process is crafted to fit small and enterprise clients.

We join your team, dive into your project and tell you what we can do together. Our partnership model of collaboration can be broken down into six steps:

How it looks in practice


Initial call

We set up an initial call to understand your application and learn about the issues you have.



Based on the initial call, we prepare a proposal and assign you a developer that best suits your needs in terms of skills and knowledge.


Research phase

We become your team members to learn everything about your project and organization. We join your meetings, chat with your programmers to look at the project from your perspective.


Pair-programming and knowledge sharing

We cooperate with your developers on your project and share our knowledge with them at the same time. 


Report with measurable improvements

At the end of the first month, we present you a report with our recommendations based on the research described in Step 3.You decide if you want to continue the cooperation or implement what we recommend yourself.


Further cooperation and support

Once you decide to continue the cooperation, we will implement the recommendations and support your further efforts. We will be happy to guide you through your next steps. You can always count on our expertise.

I would have no hesitation in recommending Callstack to others, to provide a flexible solution to an existing workforce or on a longer-term basis as part of a remote team

Ben Caulfield
CEO & Co-founder @ Eedi

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Reach out to us and deliver great performing apps that your clients will love!