Scala Engineer (Senior)
Miejsce pracy : Kielce
Technologies we use
Expected
Optional
Operating system
macOSAbout the project
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
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.
Your responsibilities
Design and develop a high-performance object- and graph-oriented framework in ScalaWork closely with JVM internals, Scala compiler, and low-level Java to optimize runtime behaviorAnalyze and improve memory allocation, concurrency, and performance trade-offs across the systemImplement compile-time features using macros, compiler plugins, or bytecode manipulationSolve complex problems in concurrent computing and graph processingCollaborate with internal tooling teams to ensure seamless integration and performance alignmentContribute to a distributed team of engineers across multiple time zones through clear communication and shared technical ownershipOur requirements
Bring strong expertise in Scala or deep knowledge of JVM internals and high-performance JavaApply hands-on experience with compile-time tools like macros, compiler plugins, or bytecode manipulationTackle complex concurrency and graph algorithm challenges with practical solutionsOptimize performance across memory allocation, runtime behavior, and compilation processesCommunicate clearly within a distributed team and contribute to shared technical goalsBalance technical depth with pragmatic decision-making under real-world constraintsUse English fluently in a professional engineering environmentOptional
Experience with C++ for low-level system integration or performance tuningThis is how we organize our work
Team size
This is how we work
at the client's siteyou focus on a single project at a timeyou can change the projectyou have influence on the technological solutions appliedyou have influence on the productyou focus on product developmentThis is how we work on a project
Continuous DeploymentContinuous IntegrationDevelopment opportunities we offer
conferences in Polanddevelopment budgetindustry-specific e-learning platformsintracompany trainingsubstantive support from technological leaderstechnical knowledge exchange within the companyWhat we offer
Flexible hybrid work model - you decide where & when to start the work. You can work remotely or join us in one of our modern offices (Krakow, Kielce, Wroclaw), always located in the city centers. Just choose what suits you best!Language lessons - we refund up to 500 PLN (per quarter) for learning all languages you would like to take! What’s more, we refund up to 1 000 PLN (per quarter) for learning the English language.Virtusity – our training division - we really value the personal growth of our #VLteam. That’s why we have a rich offer of internal courses, workshops, etc. (technical, as well as soft skills training) conducted by our employees.Training Package - use our training budget and 24 paid work hours for your development. You can choose the training from our Virtusity portfolio or external conferences, courses, workshops, etc.Home office reimbursement - you can rent all the necessary equipment from our offices, but you can also get up to 800 PLN financial support to set up your WFH.Multisport card or MyBenefit points - do you like sports and want free unlimited admission to sports facilities in your city? Or maybe you prefer the cinema, SPA in the mountains, delicious dinner, or Allegro shopping? At VirtusLab, you decide whether you choose a sports card or vouchers for countless attractions.Private healthcare - our insurer's offer allows you to have free health advice, treatments, diagnostic tests, etc., in more than 1,500 clinics operating all over the country.Building tech community - we run 9 meetup groups in Kraków, Kielce, and Rzeszów and support many other local initiatives. We also contribute to numerous open-source projects (world-famous solutions and create our own ones). Check out also Sphere.it - our unique platform with tech videos and online events.Benefits
sharing the costs of sports activitiesprivate medical caresharing the costs of foreign language classessharing the costs of professional training & coursesremote work opportunitiesflexible working timeintegration eventsDon’t worry if you don’t meet all the requirements. What matters most is your passion and willingness to develop. Moreover, B2B does not have to be the only form of cooperation. Apply and find out!VirtusLab Sp. z o.o.
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!
