Hire JavaScript vs TypeScript developers

Side-by-side hiring data for JavaScript and TypeScript - salary bands, ecosystem skills, what each engineer actually ships, and how to brief Haystack for either.

Languages

JavaScript

JavaScript engineers fluent in modern ECMAScript, runtimes and the platform itself.

Mid-level base · UK£60k–£80kJunior £40k–£60k · Senior £85k–£120k
Ecosystem
TypeScriptNode.jsReactVueViteWebpack
What they ship
  • Browser apps with vanilla JS or framework code
  • Node.js services, CLI tools and build pipelines
  • Edge functions on Cloudflare Workers, Vercel, Deno Deploy
Hire JavaScript developers
Languages

TypeScript

TypeScript engineers who treat types as a design tool, not just a linter.

Mid-level base · UK£70k–£90kJunior £45k–£65k · Senior £95k–£135k
Ecosystem
ReactNode.jsNext.jstRPCZodTurborepo
What they ship
  • End-to-end type-safe APIs with tRPC, GraphQL Code Generator or OpenAPI
  • Monorepos with Turborepo / Nx and shared type packages
  • Library code with conditional types and template literal types
Hire TypeScript developers

JavaScript vs TypeScript - at a glance

DimensionJavaScriptTypeScript
CategoryLanguagesLanguages
Mid-level UK base£60k–£80k£70k–£90k
Senior UK base£85k–£120k£95k–£135k
Best forBrowser apps with vanilla JS or framework codeEnd-to-end type-safe APIs with tRPC, GraphQL Code Generator or OpenAPI
Core ecosystemTypeScript, Node.js, React, VueReact, Node.js, Next.js, tRPC
First shortlist24 hours24 hours

JavaScript vs TypeScript - common hiring questions

Is JavaScript or TypeScript easier to hire for in 2026?

Both JavaScript and TypeScript have active talent pools on Haystack. We see first shortlists for JavaScript and TypeScript land within 24 hours of kick-off, with the median JavaScript hire closing in 14-21 days alongside comparable TypeScript roles.

What does a JavaScript developer cost vs a TypeScript developer?

Mid-level JavaScript engineers anchor around £60k–£80k UK base, with seniors reaching £85k–£120k. TypeScript engineers sit around £70k–£90k mid and £95k–£135k senior. German bands run 5-20% higher in EUR and US bands 40-50% higher in USD.

Which ecosystem libraries should I screen for - JavaScript or TypeScript?

For JavaScript we look for working experience with TypeScript, Node.js, React. For TypeScript the equivalents are React, Node.js, Next.js. Both ecosystems get surfaced on every Haystack profile so you can filter on exact tooling.

Can the same engineer cover both JavaScript and TypeScript?

Often yes - particularly when both stacks live in the same category (Languages vs Languages). On Haystack we let you require both as primary or secondary skills; senior generalists typically carry one as their main stack and one as supporting.

Should I bet on JavaScript or TypeScript for a greenfield project?

Pick on hiring depth, your team's current strengths and the ecosystem fit. JavaScript suits browser apps with vanilla js or framework code; TypeScript suits end-to-end type-safe apis with trpc, graphql code generator or openapi. We can shortlist both in parallel so you can interview against the same brief.

Do you cover senior and staff JavaScript and TypeScript engineers?

Yes - the full ladder from junior through staff/principal in both JavaScript and TypeScript. The kick-off call captures the level and shipped-work bar you need, and shortlists are filtered accordingly.

Brief Haystack on JavaScript or TypeScript - or both

Tell us the role, level and salary band. We'll send shortlists for either stack within 24 hours.