At JetBrains, code is our passion. Since 2000, we’ve been building the most effective developer tools in the world – tools that automate routine tasks and empower developers to focus on creativity, exploration, and problem-solving.
We’re looking for a Kotlin Backend Developer to join the Kocelot team and help us build the foundation of a new platform for developing domain-specific languages (DSLs).
Kocelot is an experimental project aimed at rethinking how DSLs are designed, analyzed, and embedded into modern applications. The platform combines language definition tools, reactive data processing infrastructure, and a new take on projectional editing – all designed to work seamlessly in web environments. Our goal is to make it easier for teams to build expressive, embeddable languages tailored to their domains.
You’ll be working on the core backend layer: a system that manages structured user data, tracks changes over time, and powers live, incremental processing of language semantics.
As part of our team, you will:- Design and develop scalable backend services for DSL semantic analysis and execution.
- Work on versioned, structured data storage for reactive data processing.
- Build Kotlin-based SDKs that expose the platform’s capabilities to DSL authors.
- Contribute to a unified graph-based workspace model used across the platform.
- Participate in architectural discussions and long-term technical decisions.
- Extensive JVM backend development experience.
- Extensive experience with the Kotlin programming language.
- A solid understanding of distributed systems and scalable service design.
- Prior experience with various modern storage technologies (relational databases, key-value stores, graph databases, and/or triple stores).
- Familiarity with event-driven architectures.
- The ability to prototype and iterate quickly in an experimental setting.
- A passion for clean code and maintainable systems.
- The ability to work effectively in a distributed team.
- Experience with Kotlin Multiplatform.
- Hands-on work experience with compiler plugins or meta-programming.
- Experience building collaborative editing or reactive data systems.
- Experience building DSLs, IDEs, and language processors.
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What We Do
JetBrains creates intelligent software development tools consistently used and trusted by 11.4 million professionals and 88 Fortune Global Top 100 companies. Our lineup of more than 30 products includes IDEs for most programming languages and technologies, such as IntelliJ IDEA, PyCharm, and others, as well as products for team collaboration, like YouTrack and TeamCity. JetBrains is also known for creating the Kotlin programming language, a cross-platform language used by more than 5 million developers worldwide yearly and recommended by Google as the preferred language for Android development. The company is headquartered in Prague, Czech Republic, and has offices around the world.
JetBrains IDEs
* IntelliJ IDEA (Java and Kotlin Developers)
* PyCharm (Python developers)
* PhpStorm (PHP developers)
* GoLand (Go developers)
* Rider (.NET developers)
* CLion (C and C++ developers)
* Rust Rover (Rust developers)
* WebStorm (JavaScript & TypesScript developers)
* RubyMine (Ruby and Rails developers)
* DataGrip (Tool for multiple databases)
* ReSharper (Extension for Visual Studio)
* Fleet (Multilingual IDE and code editor)
* Aqua (IDE for test automation engineers)
.NET & Visual Studio:
* Rider (IDE for .NET developers)
* ReSharper (Extension for Visual Studio)
* ReSharper C++ (Visual Studio Extension for C++ developers)
* dotCover (.NET Unit Test Runner and Code Coverage Tool)
* dotMemory (.NET Memory Profiler)
* dotTrace (.NET Performance Profiler)
* dotPeek (.NET decompiler and assembly browser)
Team Tools:
* TeamCity (Powerful CI out of the box)
* YouTrack (Project management for all your teams)
* Space (Intelligent code collaboration platform)
* Datalore (Collaborative data science platform)
* Qodana (Code quality platform for teams)
Programming Languages:
* Kotlin (Programming Language for the JVM and Android)
* MPS (Create Your Own Domain-Specific Language)
Education:
* JetBrains Academy (Learn and Teach Computer Science)
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