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# Staff Software Developer (Kotlin Libraries)

- **Company:** JetBrains
- **Location:** Amsterdam, Netherlands (Remote available)
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Software Design Documents, Java Virtual Machine (JVM), Software Engineering, Kotlin, Information Technology, Api Design
- **Published:** September 22, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=d2f237626d34836c

## About the Role

* JVM development experience down to the implementation details of the Java standard library
 * Strong understanding of the domain you've been working with
 * Ability to write design documents for complex systems with strong reasoning behind each trade-off and technical decision
 * Experience in performance engineering or API design

In general, if you see yourself reading a Unicode standard, exploring how five other languages transform strings to bytes, figuring out why some Oceania islands changed their timezone from -10:00 to +14:00 and whether it should be expressed in the API of Kotlin timezones, optimizing interface hierarchy to be more JIT-friendly and is not afraid of re-iterating over documentation a multitude of times, you won't get bored in our team.

## Description

* Create and maintain foundational libraries for Kotlin core primitives that are used by hundreds of thousands of developers
 * Become an expert in specific domains of computer science and software engineering
 * Be part of a design committee that decides how the Kotlin API should be shaped
 * Participate in creating standard Kotlin tools, specifications and language features


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