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Staff Software Developer (Kotlin Libraries)

Remote, Madrid·Added 2 days ago

JetBrains

56 open roles

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Overview

Job details

  • Fully remote

    Per the ad.

  • Relocation help

    Indicative — the ad doesn’t promise sponsorship.

Requirements

  • Work in English

    English is required, per the ad.

The role

What you'll do

  • 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

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?

Requirements

Nice to have

  • 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

Pay & benefits

What you'll get

  • 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.

Hiring process

5 steps4 interviewsa task to do

  1. Application

  2. Application review

  3. Recruiter interview

    With a recruiter

    Your experience, motivation and what excites you about JetBrains.

  4. Team interview

    With the team · Video call

    Online interview exploring your technical knowledge and experience.

  5. Test assignment

    In your own time

    Set for every role, not only developers; most can be done at home.

  6. Assignment review

    With potential future teammates

    Potential teammates review your work and may ask for fixes or clarifications.

  7. Final interview

    Advanced questions on hard skills to confirm you can handle the tasks of the role.

  8. Reference check

  • Application review may take a few weeks because of the volume received.
  • Apply even if you do not meet every requirement.

About JetBrains

JetBrains is a global software development company known for creating intelligent, productivity-enhancing tools for software developers, including IntelliJ IDEA, PyCharm, ReSharper, and the Kotlin programming language. Founded in 2000 and headquartered in Prague, Czech Republic, the company has grown to over 2,000 employees worldwide, with a strong reputation in the developer tools industry. JetBrains is privately held and profitable, with a diverse portfolio that includes IDEs, domain-specific languages, and team collaboration tools like YouTrack and Space.

JetBrains has a significant presence in Spain, with a growing team of engineers, product managers, and designers working remotely or from hubs in Madrid and Barcelona. The company is known for its remote-friendly culture, with many roles open to candidates across Spain. For international professionals, JetBrains offers a collaborative, engineering-driven environment, competitive compensation, and the opportunity to work on widely-used tools that shape the software development landscape. The company values innovation and technical excellence, making it an attractive destination for top talent.

Industry
Developer Tools
Founded
2000
Employees
1,000–5,000
Headquarters
Prague, Czech Republic
In Spain
Madrid, Barcelona
Website
jetbrains.com

Good to know if you are moving

  • JetBrains offers a flexible remote work policy, with many roles open to candidates across Spain, not just in major cities.
  • The company is known for its strong engineering culture and invests heavily in R&D, with a focus on AI and machine learning for developer tools.
  • JetBrains provides a comprehensive relocation package for international hires, including visa support and assistance with moving to Spain.
  • The company has a flat organizational structure, encouraging collaboration and innovation across teams.
  • JetBrains is a profitable, privately held company, offering stability and long-term career growth.

In their own words

Additional information

*Some benefits may vary depending on location.

We are an equal opportunity employer

We know great ideas can come from anyone, anywhere. That's why we do our best to create an open and inclusive workplace - one that welcomes everyone regardless of their background, identity, religion, age, accessibility needs, or orientation.

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