React (React.js) was developed at Facebook in 2011 and currently, it’s the most popular JavaScript library for building user interfaces. React is a declarative, efficient, and flexible for building user interfaces. User Interface is anything we show in front of users on their computers’ displays and building user interfaces is what React does really well.

User Interfaces are everywhere, from the simple buttons on a fridge to the dashboard of airplanes or cruise ships. Almost every of such interfaces can be successfully implemented with React.

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React Development Illustration

Solutions we usually develop with React

Data visualizations

Web applications

Mobile applications

SaaS applications

High-load applications

Geo-based applications

Education portals

News & media portals

CRM & ERP systems

Why React is a perfect choice for your project

Based on JavaScript

React is based on JavaScript. JavaScript XML (JSX) is one of the greatest features that not only make React easy but entertaining also.

Easy for debugging

Debugging is very easy with React. When something goes wrong, it is important to be able to track quickly the mistake to its source in the codebase and then easily solve it.


React is a component-based library. Components let you split the UI into independent, reusable pieces (components), and work with each piece separately.

Super for SEO

Not every JavaScript frameworks are search engine friendly, but React stays apart and helps to search WEB pages on the Internet efficiently.

Ready for heavy load

React is also strong and enduring enough because in combination with ES6/7 it can stand up to any amount of load.

Why do we prefer React?

In our portfolio, we have many completed and active projects of different complexities. It was necessary to have a simple, readable and very efficient solution for creating UI for all of them. We found it in React.

React helps us to create UIs fast and clear, because of its component-oriented structure. We also can use React for different scaled projects and it is really cool thing about React. We like this framework because it is progressive. React develops constantly and a lot of many new and useful features appear.

Our development process

Clarify and set project requirements
Create a system design and UX/UI wireframes
Define and prioritize development tasks, create a backlog, prioritize all the tasks and provide estimates
Select the tasks from the top of the backlog for a 2-week sprint cycle
Deliver sprint results and iterate based on the feedback
Finally, deploy the project after all goals were met

Our projects


Web Development for a Telemedicine Service in Ophthalmology

Web Development for a Telemedicine Service in Ophthalmology

Charity Donation Platform Development

Charity Donation Platform Development

Web Development Services for a Music Tech Company

Web Development Services for a Music Tech Company
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Other services we provide

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Kenny R. Lienhard

CTO, Medignition Inc

We wanted to implement a new education platform that offered online courses in finance. The scope focused on the implementation of multiple user interfaces. UpsilonIT used React, GraphQL, and GatsbyJS. UpsilonIT had strong coding skills. The app had a clean codebase and complied with all specifications. They complied with our requirements for the UI. We communicated daily via Slack.

Matt Wong

CTO, Civic Connect

Upsilon’s work was always on time and met all customer expectations. Their team had an ease of communication but what was the most impressive about them is the integrity and work ethic of each member. We had a business manager, a lead architect, and a mix of senior and regular engineers. The workflow was extremely effective - the teams had a regular cadence for communication.

Zhanar Serikpayeva

Creative Consultant, Etage Group

We needed help with mobile app development, data analytics, and beacon installation to be able to collect, store, and analyze our customer data. The finished application met the requirements perfectly, with the team finding an excellent solution to collect, analyze, and store customer data. They were highly professional throughout the work, always making themselves available, and responding well to any changes.

Dmitry Tsybin

Director of Engineering, Carggo

Upsilon provided front- and backend development for an online logistics platform. The team designed and launched a business intelligence platform and ensured scalability according to customer requirements. We were most impressed by the technical background of the specialists, their meaningful approach to task accomplishment, and aspiration to deliver the results in due time. We’re also pleased with how fast the team started the development.

Amazing companies who trust us: