Founder-led · technically screened
Kotlin is the default for Android and a strong, modern choice for JVM backends. We screen Kotlin developers for the fundamentals underneath — and for whether you actually need a mobile or a backend engineer, which are different hires.
Kotlin is the primary language for Android development and increasingly used for backend services (with Ktor or Spring). Its null-safety and coroutines make it a modern, pragmatic choice on the JVM.
Every Kotlin developer is technically assessed by us, a former software developer, before you spend a minute interviewing.
Talk to us and we’ll recommend the right approach.
Kotlin developer pay tracks the software engineer ladder, so these are the reference bands we benchmark against, by seniority and city. See the full salary benchmarks for the detail.
| Seniority | London | Berlin | Amsterdam | New York |
|---|---|---|---|---|
| Mid-level | £55k–£85k | €55k–€85k | €55k–€85k | $120k–$150k |
| Senior | £85k–£120k | €85k–€120k | €80k–€115k | $150k–$200k |
| Staff / Principal | £120k–£150k | €115k–€145k | €110k–€140k | $190k–$240k |
Reference bands, benchmarked to our software-engineer placement data · reviewed July 2026.
FAQ
Kotlin fundamentals (null-safety, coroutines, idiom) plus platform depth: Android SDK and app architecture for mobile roles, or Ktor/Spring and JVM fundamentals for backend, assessed with a realistic task on the relevant platform.
Both — Kotlin is the standard for Android and a growing backend language. These are different hires, so we scope which one you need before searching.
Pay tracks the software engineer ladder below, by seniority and city.
Tell us what you’re hiring for and we’ll come back with a plan, and usually a technically screened shortlist faster than you’d expect.