Senior Backend Kotlin Developer (JetBrains AI Platform LLM)

Senior Backend Kotlin Developer (JetBrains AI Platform LLM)

At JetBrains, our mission is to make professional software development more productive and enjoyable. We are dedicated to continuous innovation, providing solutions that empower developers and teams. We are developing a microservice platform that provides AI capabilities to all JetBrains products through a unified cloud‑based API, supporting OpenAI, Anthropic, Google, and our own models.

In This Role

• Work on existing support for large language models (LLMs) and introduce support for new ones.
• Develop various APIs on top of LLM features.
• Engage with external LLM providers and internal clients.
• Review code written by colleagues and provide valuable feedback during architecting sessions.
• Maintain the service to ensure server stability.

Qualifications

• Experience in JVM server and microservice development.
• Deep understanding of frameworks such as Ktor or Spring.
• Ability to write clean, readable, and maintainable code.
• Knowledge of modern concurrency practices.
• Strong teamwork skills, listening to diverse opinions and supporting points with reasoning.
• Ability to work in a self‑organized manner.
• Proficiency in English, both written and verbal.

Nice to Have

• Previous experience working with LLMs.
• Professional experience with Kotlin, Ktor, and Kotlin coroutines.
• Ability to combine routine tasks with creative thinking, analyze information, clarify details, suggest alternative solutions, and choose appropriate technologies.
• Prior experience building with Gradle.
• Passion for learning new things and trying new approaches.

Technological Stack

• Kotlin Multiplatform/JVM, coroutines, Gradle.
• Ktor.
• AWS (ECS, EKS) and GCP.
• GitHub and TeamCity.
• Redis, Exposed, RabbitMQ.