lvl#3 · Module 3 of 5

Modular = Better

Level 3 is where you stop writing pages and start writing applications. React and modular architecture take you from solo developer to professional frontend engineer. By the end you build faster, your code is maintainable, and you are ready for a frontend developer career.

"At Product Builders Camp, you learn to build projects that are easy to maintain."

What you'll learn in Modular = Better

Build web applications

The shift from websites (pages) to web apps (state, components, routing). Different mental model, different tooling, much larger projects.

Structure your projects for easier maintenance

Folder layout, component boundaries, separation of concerns, naming conventions. The patterns that make code survive its second month — and that hiring managers look for in your code samples.

ReactJS

The dominant frontend framework. JSX, components, props, state, hooks, conditional rendering, lists, controlled inputs, and the patterns experienced React developers reach for.

Learn to love LeetCode

Daily problem-solving climbs to Medium difficulty. By the end of Level 3 you have 35+ problems solved — the start of a portfolio of solved problems hiring managers actually look at.

Build an awesome frontend application

A real multi-feature React app — typically the project you put at the top of your portfolio for the next two years.

Tools and technologies

ReactJS — The framework
JSX — Writing markup inside JavaScript
React Router — Navigation and URL handling inside an app
Modern build tools — Bundlers and dev servers that make React workable
LeetCode (Medium tier) — Harder algorithm problems

What you'll build

Projects in Modular = Better are designed to compound. Each one reinforces the previous skill while adding the next.

A multi-page React single-page app (a dashboard, a domain-specific tool, or a public utility)
Refactor one of your Level 2 projects into React — feel the difference firsthand
A small component library you reuse in later modules

Who this module is for

Level 2 graduates with solid JavaScript fundamentals
JavaScript developers ready to specialize in modern frontend

By the end of Modular = Better

You'll build faster.
You'll have solved 35+ LeetCode problems.
You'll be ready for a frontend developer career.
You'll be taking higher-paying freelance projects.

Career trajectory: Ready for a frontend developer role. Higher-paying freelance work follows.

Prerequisites

Level 2 — comfortable with JavaScript fundamentals and DOM manipulation.

← Previous module lvl#2 Make It Run Next module → lvl#4 The Full Stack

Ready to start Modular = Better?

Registering for the Full Program includes every module, the guaranteed internship for above-average completers, and access to the Launchpad track for top performers.