Hire Offshore JavaScript Developers

Core language & browser work

• • Write modern ES2023+ JavaScript — destructuring, optional chaining, generators, and iterators — without transpiler crutches
• • Manipulate the DOM, delegate events, and manage focus and forms without reaching for a framework when one is not needed
• • Handle async flows with promises, async/await, AbortController, and correct error propagation

TypeScript & code quality

• • Add and tighten TypeScript types, generics, and discriminated unions across an existing JS codebase
• • Configure ESLint and Prettier and enforce them in CI so review stays about logic, not style
• • Refactor callback-heavy or legacy code into readable async modules without changing behavior

Tooling & builds

• • Set up and tune Vite, esbuild, or Webpack — code splitting, aliases, and environment config
• • Manage dependencies, lockfiles, and monorepo workspaces with npm, pnpm, or Bun
• • Write build and automation scripts in Node so releases are one command, not a runbook

Full-stack JavaScript

• • Build REST or GraphQL endpoints in Node with Express, Fastify, or Hono and validate input at the boundary
• • Consume and shape APIs from the client with fetch, caching, retries, and typed responses
• • Wire the browser and server together — auth cookies, SSR data flow, and shared validation schemas

Testing & review

• • Write unit and integration tests in Vitest or Jest that cover behavior, not implementation detail
• • Add Playwright or Cypress end-to-end tests for the critical user paths
• • Review pull requests for correctness, async bugs, and clear naming, and leave feedback that unblocks

What is the difference between hiring a JavaScript developer and a React or Node developer?

A generalist JavaScript developer knows the language and its ecosystem broadly — the DOM, the event loop, async patterns, TypeScript, and tooling — and can work on both the browser and the server. Hire one when your project spans the stack or when you are not sure which framework the work will lean on. If the work is clearly one-sided, hire the specialist: a [React developer](/hire/react-developer/) for component and design-system work, a [Node.js developer](/hire/node-js-developer/) for backend services and APIs, or a [frontend developer](/hire/frontend-developer/) for browser-heavy UI. Most of our JS generalists have real depth in at least one of those areas too, so tell us your stack in the kickoff call and we match accordingly.

Do your JavaScript developers know TypeScript?

Yes. Every developer we shortlist writes TypeScript in production, not just plain JavaScript. TypeScript is on the take-home and the final interview — we check that they can add generics, model a discriminated union, and tighten types on an existing untyped module without breaking it. If your codebase is still plain JavaScript and you want to migrate incrementally, we can match a developer who has done a JS-to-TS migration before, because doing it file by file with allowJs and gradual strictness is a different skill from starting a TS project greenfield.

Can a JavaScript developer work on both the frontend and the backend?

That is the point of hiring a generalist. Because Node.js runs the same language as the browser, a strong JavaScript developer can ship a UI feature and its API endpoint in the same pull request, share validation schemas between client and server, and debug across the boundary instead of throwing the bug over a wall. That said, "full-stack" is a spectrum — some are stronger on the client, some on the server. We tell you honestly where each candidate is strongest so you can match them to where the work sits, and we will not oversell a frontend specialist as a backend owner.

How much does an offshore JavaScript developer cost, and how fast can they start?

A full-time dedicated offshore JavaScript developer starts at $2,600 per month with Remoteria for a mid-level engineer, rising for senior hires who can own a full-stack feature area and set conventions. US JavaScript developers cost $110,000–$150,000 per year fully loaded, so you typically save 60–70%. Onboarding runs 10–14 business days: we shortlist 3 vetted candidates within a week, you run the final interview, and your developer is pushing their first PR by around day 10 of kickoff.

Which frameworks do your JavaScript developers know?

Most of our JavaScript developers are current on React and at least one Node framework (Express, Fastify, or Nest), and many have worked in Vue, Svelte, or Next.js as well. But we match on the language and the fundamentals first — closures, the event loop, async correctness, and clean async error handling transfer to any framework, whereas framework-specific knowledge is quick to pick up on top of a strong base. Tell us your exact stack at kickoff and we shortlist developers whose recent production work matches it, so the first PR looks like it belongs.

How do you vet for real JavaScript ability versus framework memorization?

Our technical screen is deliberately framework-light. We ask candidates to explain closures, the prototype chain, this-binding, and the event loop, and to reason about the output of a snippet mixing setTimeout, promises, and microtasks — the things you cannot fake by memorizing a framework tutorial. The take-home is a small vanilla or lightly-frameworked task graded on correctness, async handling, and readable code. A developer who can only work inside one framework and freezes on plain JavaScript does not pass, because framework churn is constant and the language underneath is what lasts.