Must have

• JVM

• Scala

• Performance Optimization

• English (B2)

Nice to have

• Kotlin

• C++

Requirements description

What we expect

• Write high-performance Scala code with a strong focus on runtime efficiency and memory management
• Work confidently with JVM internals, Java (21+), and low-level system behavior
• Apply compile-time or metaprogramming techniques such as macros, compiler plugins, or bytecode manipulation
• Tackle complex problems in concurrency and graph algorithms with practical, scalable solutions
• Optimize performance through careful trade-off analysis across compilation and execution layers
• Communicate technical ideas clearly within a distributed team environment
• Collaborate effectively with peers to maintain a high standard of engineering quality

Nice to have

• Experience with C++ for performance-critical components
• Familiarity with annotation processors or advanced Java tooling

Offer description

VirtusLab is a leading European software consulting and engineering company, home to over 350 EU-based professionals. Our mission is to craft clean code and practical solutions with precision and purpose. We foster a dynamic culture rooted in strong engineering, a sense of ownership, and transparency, empowering our team. As part of the expanding VirtusLab Group, we offer a compelling environment for those seeking to make a substantial impact in the software industry within a forward-thinking organization.

If you’re unsure whether you meet all the requirements, we still want you to apply. What matters most is your passion and willingness to develop. We prefer B2B, but it does not have to be the only form of cooperation. Apply and find out!

Project Graph

Project Scope

The project builds a high-performance framework in Scala focused on object and graph-oriented computing. It integrates deeply with JVM internals and the Scala compiler to solve complex challenges in concurrency, memory allocation, and graph processing. Designed for scalability and efficiency, the framework supports over 1000 engineers globally.

Tech Stack

Scala 2.13, JVM, Java (21 with planned migration to 25), C++, performance optimisation and testing

Team

The team consists of over 10 experienced engineers distributed across North America, Europe, and Asia. They bring deep expertise in Scala, JVM internals, and performance optimization, working closely under a UK-based Project Manager.

A few perks of being with us

• Building tech community
• Flexible hybrid work model
• Home office reimbursement
• Language lessons
• MyBenefit points
• Private healthcare
• Training Package
• Virtusity / in-house training
• And a lot more!

Your responsibilities

1. Design and develop a high-performance object- and graph-oriented framework in Scala
2. Work closely with JVM internals, Scala compiler, and low-level Java to optimize runtime behavior
3. Solve complex problems in concurrent computing, graph processing, and compile-time tooling
4. Analyze performance trade-offs across memory allocation, concurrency models, and compilation strategies
5. Write clean, efficient code with a focus on scalability and maintainability
6. Collaborate with internal tooling teams to ensure seamless integration across systems

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