JavaScript is the world’s most widely used programming language, forming the backbone of interactive web development.
It’s the only language that runs natively in all web browsers and is the foundation for dynamic, real-time, and mobile-friendly applications.

React — an open-source library created by Meta (Facebook) — transformed front-end development by introducing reusable “component-based architecture” that makes complex UIs easy to build and maintain.
Together, JavaScript and React dominate global software engineering, from social networks to enterprise systems.

What We Teach at Oliya.tech

At Oliya Academy, students learn modern JavaScript (ES6+) and React by building production-grade user interfaces, websites, and mobile applications.

They begin with JavaScript fundamentals — variables, functions, asynchronous programming, and the Document Object Model (DOM) — before mastering React’s modern hooks and context-based state management.

The course includes:

• Creating modular, responsive websites using React + Tailwind CSS.

• Integrating REST APIs with asynchronous logic (fetch / Axios).

• Building Single Page Applications (SPAs) and routing using React Router.

• Managing state using useState, useReducer, and Context API.

• Testing components using Jest and React Testing Library.

• Deploying front-end builds on AWS Amplify or Vercel, mirroring corporate deployment pipelines.

By the end of Week 12, students have deployed at least one complete React web app and one React Native mobile application with connected APIs and authentication systems.

Industry Examples

Each example below is publicly verified through official engineering blogs, conference talks, or open-source repositories — reflecting how JavaScript and React are genuinely used in production environments worldwide.

1. Meta (Facebook & Instagram)
React was born inside Facebook’s engineering teams to simplify complex UI rendering.
Today, React powers the Facebook web app, Messenger interface, Instagram’s web portal, and numerous internal tools at Meta.
React is still maintained by Meta’s open-source engineers and forms the basis of their global design system.

2. Netflix
Netflix’s front-end architecture heavily depends on JavaScript and React for their interactive video catalogue and personalised dashboards.
Their engineers have detailed React’s role in achieving high performance across devices and browsers, ensuring seamless playback and content discovery.

3. Airbnb
Airbnb’s Design Language System (DLS), publicly documented on GitHub, uses React components for its entire booking interface.
Developers reuse hundreds of modular UI components to maintain consistent branding and accessibility across its global platform.

4. Uber
Uber’s front-end platform runs on React and Redux to render live maps, trip tracking, and driver analytics.
The engineering blog confirms React’s role in powering Uber Eats and Freight applications, managing complex real-time updates efficiently.

5. PayPal
PayPal engineers migrated their user dashboards and merchant portals to React for maintainability and speed.
Their official blog describes how this migration reduced load times and simplified the integration of payments APIs across multiple regions.

6. BBC
The BBC utilises React and Node.js in its “Gel” design system to serve high-performance, accessible web pages globally.
The BBC GEL framework is built around reusable React components to ensure compliance and consistency across all digital services.

7. Atlassian (Jira & Trello)
Jira, Confluence, and Trello — all developed by Atlassian — use React extensively in their web clients.
Their documentation for plugin and UI-extension developers confirms React as the preferred front-end library for integration.

8. Shopify
Shopify’s “Polaris” design system, open-sourced on GitHub, is built entirely in React.
Every merchant interface, from product listings to analytics dashboards, uses React components to deliver a unified experience across millions of stores.

9. Microsoft
Microsoft employs React in its Fluent UI framework — the design language for Office 365, Outlook, Teams, and SharePoint web experiences.
Their open-source Fluent UI repository on GitHub confirms React as a supported library.

10. Discord
Discord’s browser and desktop clients use JavaScript and React for chat interfaces, audio controls, and state synchronisation between millions of active users.
Engineers have openly shared how React’s virtual DOM optimises rendering speed in high-frequency updates.

Summary

Across these ten confirmed organisations, JavaScript and React serve as the visual engine of modern computing:

1. Global consumer platforms — Meta, Netflix, Airbnb, Uber.

2. Enterprise and collaboration tools — Microsoft, Atlassian, Shopify.

3. Media and communication — BBC, PayPal, Discord.

4. Design systems and accessibility frameworks — All of the above rely on React’s open-source foundation.

React’s open ecosystem — combined with JavaScript’s universal reach — ensures that graduates fluent in these technologies can work anywhere in the world.
Virtually every major software product with a web interface employs React either directly or via derivative frameworks (Next.js, Gatsby, React Native).

Career Paths

• Front-End Developer — Create interactive, accessible, and scalable web apps.

• Full-Stack Developer — Combine React front-ends with Python/Django back-ends.

• UI Engineer / Web Designer — Translate wireframes into production-grade UIs.

• JavaScript Developer — Develop SPAs and integrate cloud APIs.

• React Native Engineer — Extend React skills to cross-platform mobile apps.