JavaScript
JavaScript engineers fluent in modern ECMAScript, runtimes and the platform itself.
- Browser apps with vanilla JS or framework code
- Node.js services, CLI tools and build pipelines
- Edge functions on Cloudflare Workers, Vercel, Deno Deploy
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.
JavaScript engineers fluent in modern ECMAScript, runtimes and the platform itself.
TypeScript engineers who treat types as a design tool, not just a linter.
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.
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.
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.
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.
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.
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.
Tell us the role, level and salary band. We'll send shortlists for either stack within 24 hours.