ApplySarthiStaff Software Developer (Kotlin Libraries)
JetBrains
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Skills named in this job
Read from the description itself, not inferred.
This role on the market
26 open libraries roles across 8 companies are on ApplySarthi right now.
- Senior Math Libraries Engineer – Emulation in AI and HPCNvidia
- Senior Product Manager, Client LibrariesMongoDB
- Applied Scientist, Amazon Cryptographic LibrariesAmazon Development Center U.S., Inc.
- Sr Applied Scientist, Amazon Cryptographic LibrariesAmazon.com Services LLC
What libraries roles keep asking for: AWS (19%), Python (15%), Rust (15%) — counted across their open postings here.
Remote Software Developer jobs · Java jobs · Kotlin jobs
JetBrains has 65 open roles listed here.
- Senior Product Manager (JetBrains Context)
- Customer Success Engineer EMEA
- Team Lead Kotlin Infrastructure
- Release Engineer
- Senior Software Developer (JCP Core Foundation Licensing and Quotation)
Counted across 14 company job boards, updated as roles open and close.
Preparing for this interview
Interviews for libraries roles keep coming back to AWS, Python, Rust. Practise those questions before you sit with JetBrains.
Questions you are likely to be asked
- Why do you want to join JetBrains?
- What is your experience with Kotlin? Tell me one thing you learned the hard way.
- Walk me through a system you built. How was it designed, and what would you change now?
- Tell me about a hard bug you tracked down. How did you find the cause?
- How do you decide what to test, and what does good code review look like to you?
Prep Sarthi gives you a free mock interview: an AI interviewer asks you questions like these out loud, from your own CV and this job, and shows your score and your weakest answer.
Practise the Staff Software Developer (Kotlin Libraries) at JetBrains interview free →As part of our team, you will:
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Create and maintain foundational libraries for Kotlin core primitives that are used by hundreds of thousands of developers
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Become an expert in specific domains of computer science and software engineering
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Be part of a design committee that decides how the Kotlin API should be shaped
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Participate in creating standard Kotlin tools, specifications and language features
Preferable:
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JVM development experience down to the implementation details of the Java standard library
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Strong understanding of the domain you've been working with
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Ability to write design documents for complex systems with strong reasoning behind each trade-off and technical decision
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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.
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We are an equal opportunity employer
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Match this job to your CV
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Listed on greenhouse · posted 2026-09-22. ApplySarthi collects openings and links to application pages; the role is advertised by JetBrains, not by us.