React Developer — US SaaS, E-commerce and Startup Teams

React is the default choice for new user interfaces at US SaaS companies, e-commerce brands and startups, which makes "React developer" one of the most common titles in US front end hiring. In practice it covers two quite different jobs: implementing interfaces someone else designed, and owning the front end of a product as an engineer.

What the work involves

Building and maintaining components, wiring them to APIs, and handling the states nobody puts in the design file — loading, empty, error and stale. Above that: deciding where state lives, how data is fetched and cached, what renders on the server and what renders on the client, and keeping the bundle small enough that the app is usable on a mid-range phone.

Requirements

• JavaScript properly — closures, promises, the event loop, immutability. React problems are usually JavaScript problems
• React itself: hooks, the rules that govern them, effects used sparingly, and why a component re-renders
• A current toolchain. Create React App was sunset in February 2025; new work uses Vite or a framework such as Next.js
• State and data fetching at scale: Context, Redux Toolkit, Zustand, TanStack Query — and a reason for the choice
• TypeScript, which is now on the majority of US React postings
• Testing with React Testing Library, plus Git and CI
• Accessibility to WCAG 2.1 Level AA and Core Web Vitals literacy

How the pay is structured

• Interface implementation roles sit against the BLS web developer occupation: a $92,650 median as of May 2025, from under $48,100 to above $162,290
• Product engineering roles that happen to use React sit in the software developer occupation at a $135,980 median
• TypeScript, testing and performance work is what moves a candidate between those two bands — not another component library

Before you apply

Establish which of the two jobs this is. An advert that describes pixel-perfect implementation from Figma is the first. One that describes owning data fetching, rendering strategy and performance budgets is the second. They are advertised under the same title and paid about $43,000 apart at the median.

Note: pay, remote policy and stack requirements are set by each employer — not by Sajad Digital Services. Confirm the details on the employer's own advertisement before applying.