We are #VLteam – tech enthusiasts constantly striving for growth. The team is our foundation, that’s why we care the most about the friendly atmosphere, a lot of self-development opportunities and good working conditions. Trust and autonomy are two essential qualities that drive our performance. We simply believe in the idea of ​​“measuring outcomes, not hours”. Join us & see for yourself!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.📝Project scopeYou’ll be responsible for improving scalability and performance of a distributed ledger system. This includes going deep into the application code, JVM internals, database queries, server configuration and much more. Previous performance-related work is a great plus.🛠Tech stackScala 2.13, PostgreSQL, Pekko Streams, Docker, OpenTelemetry, Prometheus, Grafana🚵‍♂️TeamLocated in Switzerland and Krakow, it consists of 4-6 people and a Product Manager.What we expect in general Strong proficiency in Scala and its ecosystem, or extensive experience with low-level JVM internals and high-performance Java development. Deep understanding of performance optimization. Strong communication skills and the ability to convey complex technical concepts clearly. A pragmatic approach to problem-solving, balancing technical excellence with real-world constraints. Ability to work effectively within a team, contributing to a collaborative and high-performance engineering culture. Good command of English (B2/C1).