Senior Research Engineer (Agentic Behavior)

JetBrains; Poland; Remote; PLN 180,000 - 300,000; Full time

Benefits offered by this job

Strong base salary

Flexible work location

Remote abroad

Extra time off

Medical insurance

Learning opportunities

Relocation support

Language classes

Lunch allowance

Mental health support

Sports stipend

Internal events

Job summary

JetBrains is seeking a Research Engineer for the Kotlin AI Value Stream. You will own the end-to-end loop: analyze how AI agents fail on Kotlin, build evals to capture failures, research and implement fixes, and measure improvements.

Your work will shape how developers experience Kotlin through AI coding agents. Join a team that drives evaluation infrastructure, error analysis tools, and post-training pipelines across Android, Kotlin Multiplatform, server, web, and desktop platforms.

Qualifications

• End-to-end research on AI agents for Kotlin code quality.
• Analyze agent failures, build evals, and implement fixes.
• Measure improvements to guide development.

Responsibilities

• Own the end-to-end loop for Kotlin AI agents.
• Analyze failures, design evaluation suites, and implement improvements.
• Quantify impact of fixes on Kotlin development tasks.

Job description

At JetBrains, code is our passion. Ever since we started, back in 2000, we've been striving to make the strongest, most effective developer tools on earth. Today, AI-powered coding agents are becoming a core part of how developers write Kotlin – and we want to make sure they write it well.

The Kotlin AI Value Stream team is responsible for how AI agents understand, generate, and improve Kotlin code across all platforms: Android, Kotlin Multiplatform, server-side, web, desktop, and others. We build the evaluation infrastructure, error analysis tools, and post-training pipelines that measure and improve agent behavior on real Kotlin developer tasks.

As a Research Engineer on this team, you'll own the end-to-end loop: Analyze how agents fail on Kotlin → build evals that capture those failures → research and implement methods to fix them → measure the improvement. Your work will directly shape how millions of developers experience Kotlin through AI coding agents.

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.
• 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.