Languages
Hire JavaScript developers
JavaScript engineers fluent in modern ECMAScript, runtimes and the platform itself.
Mid-level base · UK · DE · US
£60k–£80k · €70k–€90k · $85k–$115k
3
Markets
UK · DE · US
24h
First shortlist
from kick-off call
14–21
Days to hire
median across stacks
£60k–£80k
Typical mid pay (UK)
Why Haystack
The fastest way to hire JavaScript developers - without the agency tax.
Modern JavaScript spans the browser, Node, edge runtimes, build tooling and serverless. We help teams hire JS engineers who treat the language as a platform, not a syntax.
What they ship
Production JavaScript work, not tutorials.
- Browser apps with vanilla JS or framework code
- Node.js services, CLI tools and build pipelines
- Edge functions on Cloudflare Workers, Vercel, Deno Deploy
- Library code published to npm with proper module exports
Salary benchmark
Salary benchmark for JavaScript developers across UK, Germany & US
Anchored to live Haystack data. London, Berlin tech hubs and US coastal markets skew toward the upper bound.
GBP · base salary
Junior · 0–3 yrs
£40k–£60k
Mid · 3–6 yrs
£60k–£80k
Senior · 6+ yrs
£85k–£120k
EUR · base salary
Junior · 0–3 yrs
€45k–€70k
Mid · 3–6 yrs
€70k–€90k
Senior · 6+ yrs
€100k–€140k
USD · base salary
Junior · 0–3 yrs
$60k–$85k
Mid · 3–6 yrs
$85k–$115k
Senior · 6+ yrs
$125k–$175k
EUR and USD bands are indicative conversions from live UK data using current market multipliers. Local seniority, sector and equity packages can push offers higher.
The JavaScript ecosystem your hire should know
4 core · 4 nice to have
Core stack
TypeScript
Node.js
React
VueNice to have
Webpack
Babel
ESLintWhere the talent lives
Hire JavaScript developers by city
Explore localised salary benchmarks and top employers in any of our cities.
UK
8 cities · GBPDE
8 cities · EURHires made on Haystack by teams like
Interview prep
Sample JavaScript interview questions
Use these across technical and behavioural rounds. Tap a card for what to listen for.
Blueprint
Hiring through Haystack takes days, not months
A repeatable five-step playbook our employers run for every role.
- 01
30-min kick-off
Day 0We capture the brief, scorecard and salary band. No long forms.
- 02
Matches in 24h
Day 1A curated shortlist of vetted candidates lands in your dashboard.
- 03
Interview rounds
Day 2–10We handle scheduling. You focus on the conversation.
- 04
Offer & references
Day 10–14We support both sides through offer and reference checks.
- 05
Onboard
Day 14–21Structured ramp template so your new hire ships in week one.
92%
Offer acceptance
Because every JavaScript candidate has aligned on level, comp and working pattern before you meet, offers via Haystack are accepted 92% of the time.
Leading tech employers use Haystack to hire world-class candidates
"For anyone in the industry struggling with tech hiring and finding those really niche candidates, I'd highly recommend using Haystack. Ultimately Haystack helped us find great candidates that we couldn't find anywhere else."
"Working with Haystack has helped us widen our brand, it's helped us recruit great people, and it's been an easy thing to do. When we think about our candidate experience and the experience of people in my team, I want that rounded experience and that's what we've seen with Haystack."
"I'm really impressed with the candidates that I'm finding on Haystack, I'm looking at them and thinking, 'wow, this looks like a great engineer'. We made multiple hires in our first year. It's been a really nice way to hire tech talent, with a very unique approach."
FAQ
Hiring JavaScript developers - common questions
Keep exploring
Related stacks & roles
Stay inside the Haystack network - every link is interview-ready.
More Languages
Ready to hire JavaScript developers?
Book a quick chat with the Haystack team and start matching with vetted candidates this week.