Hire JavaScript developers with fundamentals that outlast frameworks

Frameworks change every few years; the language underneath does not. Cubehire JavaScript developers are tested on closures, async code, the event loop and the DOM, so they can work in React today, a legacy jQuery page tomorrow and a Node.js script the day after.

Hire JavaScript Developers How we vet them
The work

What our JavaScript Developers build

Typical projects companies bring a JavaScript developer in for.

1

Interactive website features

Calculators, configurators, filters and forms that work without a heavy framework.

2

Legacy code modernization

jQuery and older scripts refactored into modern ES modules with tests.

3

Browser extensions

Chrome and Firefox extensions that add workflows on top of the tools your team uses.

4

Third party integrations

Payment widgets, analytics, maps and embedded scripts added without slowing the page.

Skills

Skills we test every JavaScript developer on

  • ES2023 JavaScript
  • Async and Promises
  • DOM and browser APIs
  • Node.js
  • React or Vue
  • jQuery
  • Webpack and Vite
  • Fetch and REST
  • Web Components
  • Chrome extension APIs
  • Jest
  • Debugging in DevTools
Vetting

How we vet JavaScript Developers

Every JavaScript developer sits the Cubehire AI interview: multiple choice fundamentals, a timed written and coding round, and a recorded video round. A person on our team then reviews the profile before any company sees it. For this role, the interview checks that they can:

  1. Check 1

    Fixes a subtle async bug involving promises and the event loop in a timed coding task.

  2. Check 2

    Explains scope, closures and this binding with practical examples.

  3. Check 3

    Refactors messy legacy code into readable modules without changing behavior.

Available now

Vetted JavaScript Developers in the network

Each profile carries a scored AI interview and a human review.

See the whole network

Tell us about your JavaScript developer role

New profiles are approved every week. Describe the role and we will send matched, interview scored JavaScript Developers within 48 hours.

Describe the role
How it works

Hire in 4 easy steps

From the first conversation to a signed engineer, without the six-week search in between.

01
Define
Tell us what you need

Describe the role, the stack and the work. No job spec required, a conversation is enough.

02
Discover
Meet the top engineers

Three to five matched engineers within 48 hours, each with their AI interview score attached.

03
Evaluate
Interview with ease

Pick who you want to meet and we handle the scheduling on both sides.

04
Onboard
Hire with confidence

Contracts, USD payroll and compliance handled. You get an engineer, not an admin project.

Terms

Simple terms for US companies

Shortlist in 48 hours

Three to five interview scored profiles that match your stack, delivered within two days.

Hours that overlap yours

A shifted working day agreed during hiring, with daily overlap with Eastern or Pacific time.

Contracts and payroll handled

We carry the paperwork and pay the developer in USD, so you are not opening an entity abroad.

Replacement guarantee

If the fit is not right, we replace the developer at no extra cost within the guarantee period.

Hiring JavaScript Developers

Questions about hiring JavaScript Developers

What companies ask before they hire a JavaScript developer through Cubehire.

Talk to our team
Hire a JavaScript developer when the work spans several tools, legacy pages, extensions or scripts rather than one React app. For a dedicated React product, a React developer is the closer match.
Many can, for scripts, integrations and simple APIs. For backend services at scale, see our Node.js developers.
Yes. Modernizing jQuery and inline scripts into maintainable modules is a common first project, and it often speeds up the site too.
Yes. Unit tests with Jest or Vitest and end to end checks with Playwright or Cypress are part of how they work.
A flat rate quoted before you interview anyone: a one time fee for full time placements, or a fixed monthly rate for contract work. There is no percentage of salary. See the pricing page for current rates.

Still have a question about Cubehire?

Ask about vetting, pricing, contracts or how the AI interview works. Cubie, our assistant, answers straight away and raises a ticket for the team when it cannot.

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Ready to hire a JavaScript developer?

Tell us the stack and the work. You get matched, interview scored JavaScript Developers within 48 hours.

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