Staff Software Developer (Kotlin Libraries)

JetBrains; United States; Hybrid; USD 140,000 - 180,000; Full time

Benefits offered by this job

Strong base salary

Flexible work location

Remote work abroad

Meal/Lunch allowance

Medical insurance allowance

Learning and development

Relocation support

Language classes

Mental health support

On-site gym / sports stipend

Internal events

Job summary

JetBrains is expanding the Kotlin team to build foundational libraries for core primitives used by developers worldwide. You will become an expert in select computer science domains and join a design committee that shapes the Kotlin API.

You will help create standard Kotlin tools, specifications, and language features, contributing to ongoing API evolution and performance improvements. Preferred candidates have deep JVM understanding, strong domain knowledge, and the ability to write concise

Qualifications

• Proficiency in Kotlin and JVM internals with deep technical skills.
• Strong ability to design robust APIs and document trade-offs clearly.
• Experience writing design docs for complex systems.

Responsibilities

• Create and maintain foundational libraries for Kotlin core primitives 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.

Skills

Kotlin

JVM internals

API design

Design docs

Job description

As part of our team, you will:

• 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

Preferable:

• 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.

Why join JetBrains?

• Strong base salary. We offer competitive pay that reflects your skills and experience.
• Flexible work location. Enjoy the freedom to work from home or from the office.
• Remote work. Spend up to 30 days per year working remotely from abroad.
• Extra time off. More days to relax, recharge, and do the things you love.
• Medical insurance allowance. Enjoy peace of mind for you and your family
• Learning and development opportunities. Access to conferences, courses, and language classes.
• Relocation support. We help make your move as smooth and stress-free as possible. (keep if relevant for the role)
• Language classes. Pick up the local language or sharpen your English skills.
• Fuel your day. Enjoy a hot meal or receive a lunch allowance on workdays.
• Mental health support. To help you feel your best, we provide easy access to professional mental health services.
• Sports benefit. Enjoy an on-site gym or sports club stipend.
• Internal events. Join company-wide celebrations and team gatherings.

*Some benefits may vary depending on location.

We are an equal opportunity employer

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