(Senior) Machine Learning Developer (Junie)

JetBrains creates intelligent software development tools used by over 15 million users and 300,000 companies, including 88 of the Fortune Global Top 100. The company focuses on making development teams more productive and AI adoptable at scale.

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

• 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.