React Mastery
Roadmap.

JavaScript is the language React is written in. Without a solid grasp of how JS executes — scope, closures, prototypes, async — React hooks and lifecycle will feel like magic instead of mechanics.

React renders to HTML and CSS. Developers who only know JSX syntax miss accessibility, layout, and responsive design — the things users actually experience.

React is a library for building UIs with components. This phase covers the mental model: UI = f(state), unidirectional data flow, and declarative rendering.

Hooks let function components use state, lifecycle, and context without classes. They are the primary API surface in modern React.

Understanding React's render cycle, reconciliation, and Fiber architecture separates developers who debug efficiently from those who guess-and-check.

Not every app needs Redux. Learn when local state, Context, or dedicated libraries fit — and when server state should live outside the client entirely.

Forms are where UX meets validation meets security. Modern React form libraries eliminate boilerplate while keeping performance and accessibility.

Client-side routing enables SPA navigation without full page reloads. React Router v6+ and Next.js App Router are the two dominant solutions.

Performance is a feature. Users abandon sites that feel slow. React provides tools, but measurement must come first.

Patterns that scale component APIs beyond simple props. These are how design systems and headless UI libraries are built.

Production apps fail. Error boundaries, retry logic, and proper logging distinguish polished apps from fragile ones.

React apps are shells around data. Master fetching patterns, real-time communication, and pagination for production apps.

Auth is security-critical. Understand JWT flows, session management, OAuth, and how to protect routes without exposing tokens.

Tests are documentation that executes. Focus on user-visible behavior, not implementation details.

TypeScript catches bugs at compile time and serves as living documentation. Essential for any team-scale React project.

Next.js is the production React framework. App Router, Server Components, and Server Actions redefine how React apps are architected.

Modern tooling makes React development fast and reliable. Understand what happens between your code and the browser.

How you organize code determines how fast teams ship and how easy bugs are to find. Architecture is about trade-offs, not dogma.

Accessibility is not optional. 15%+ of users rely on assistive technology. Legal requirements (ADA, WCAG) apply to most products.

Frontend security is real security. XSS, CSRF, and insecure token storage are exploitable vulnerabilities, not theoretical risks.

System design for frontend engineers: how to architect dashboards, real-time apps, and data-heavy interfaces that scale.

Machine coding rounds test your ability to build working UI components in 45–90 minutes. Practice these patterns until they are muscle memory.

Technical interviews test breadth and depth. Prepare structured answers for React, JavaScript, system design, and behavioral questions.

Capstone projects prove you can ship production-grade applications. Each project should demonstrate multiple skills from earlier phases.