Senior Machine Learning Developer

About the Position

Are you an engineer who loves diving deep into ML models, building standalone CLI tools, and exploring how far AI agents can go in autonomous coding? Do you want to rethink how software is built and use the tools you create every single day?

We are looking for a Senior Machine Learning Developer to join our team at JetBrains. You will be instrumental in shaping the future of autonomous development with our AI coding agent, Junie.

Responsibilities

• Develop and ship new features for Junie across CLI and model integrations.
• Experiment with model setups, ensembling, and cost efficiency strategies.
• Build and test autonomous agent behaviors for long-term project maintenance.
• Own the full development cycle from initial research to production-ready code.
• Use Junie daily to continuously iterate on its quality and user experience.

Requirements

• Comfort taking full ownership of decisions and implementation.
• The curiosity to challenge assumptions and experiment with new ideas.
• The ability to learn new concepts quickly and adapt quickly.
• A mindset focused on long-term impact rather than short-term workarounds.
• Strong interest in autonomous AI systems and software engineering tools.

Skills

• Proven track record of developing and shipping machine learning or full-stack software products.
• Hands-on experience working with LLMs, prompt engineering, or agentic workflows.
• Ability to write high-quality production code across the full development lifecycle.
• Practical experience building or fine-tuning ML models.

We Offer

• Strong base salary.
• Flexible work location.
• Remote work options.
• Extra time off.
• Medical insurance allowance.
• Learning and development opportunities.
• Relocation support.
• Language classes.
• Fuel your day.
• Mental health support.
• Sports benefit.
• Internal events.

About the Company

We create intelligent software development tools for developers and teams. More than 15 million users, over 300,000 companies, and 88 of the Fortune Global Top 100 rely on our products to solve real, complex problems. Our mission is simple: make development teams more productive and AI adoptable at scale.

Locations

• Amsterdam, Netherlands
• Belgrade, Serbia
• Berlin, Germany
• Limassol, Cyprus
• London, United Kingdom

Why Join JetBrains?

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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