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Scala Engineer (Senior)

Scala Engineer (Senior)
B2B21 000 - 27 000 PLN NET
LOCATION + Remote Poland: Kielce, Kraków, Wrocław
Apply now

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!

About the role

Scala Advanced
Databases Regular
Distributed systems Regular
English Advanced
View available projects
Project
Smart Contracts - Scala & Algorithms
Project Scope

We are working on the project together with a partner from the Smart Contracts industry. We are developing our own language for defining contracts, ensuring consistency and security of transactions, as well as infrastructure for their launch. We are also creating components that enable the integration of the above-mentioned language with new and existing solutions in the area of Distributed Ledger Technology (DLT). The work is divided between several teams responsible for individual components and the performance of the solution. The product is used by large international companies in the financial industry.

This role specifically involves improving algorithmic performance and stack safety in transaction processing.

Apart from Scala proficiency, you must have a strong background in algorithms and data structures together with good JVM understanding.

Challenges

You’ll be responsible for implementing algorithmic performance and safety improvements, such as:

  • ensuring stack safety and maximum performance of recursive method calls in transaction processing, 
  • measure, identify and resolve bottlenecks in transaction processing,
  • …with other critical algorithmic performance improvements over complicated data structures to follow.

You will be working closely with a highly skilled core team, so this is also an opportunity to learn and grow, improving critical parts of a large productive system.

Tech stack

Scala, algorithms, data structures, JVM

Project
Lapis
Project Scope

In partnership with Smart Contract industry leaders, we are developing a high-performance Distributed Ledger Technology access layer for the global financial sector. Our platform provides international institutions with a secure gateway to manage and execute smart contracts at an enterprise scale.

Challenges
  • Working with complex Scala codebase
  • Implementing new features in a gRPC-based API
  • Improving performance and resource management
Tech stack

Scala 2.13, Cats, PostgreSQL, gRPC API

Team

Located in Switzerland and Krakow, it consists of 4-6 people and a Technical Lead.

Project
Build migration & Open Source Transition
Project Scope

We are managing a large-scale CI/CD infrastructure for a project that is currently transitioning its build system to an Open Source model. The existing environment is hosted on Azure and utilizes CircleCI. Our goal is to migrate this entire ecosystem to GitHub Actions, merging private repositories into public ones to foster community collaboration.

This is a high-stakes environment supporting over 40 developers where “every minute counts.” The CI pipeline is big – a single test run can utilize up to 30 machines – meaning performance and reliability are important.

Challenges
  • Strategic Migration: You will be responsible for architecting and executing the move from CircleCI to GitHub Actions 
  • Scalability at Scale: Managing a complex CI that handles 30-machine parallel test runs and optimizing it for speed.
  • Repository Consolidation: Merging codebases into public Open Source repositories.
  • Ownership: You won’t just be executing tasks; you will be coming up with the plan, testing it, and adjusting the strategy to ensure the final success of the migration.
Tech stack

CircleCI, GitHub Actions, Bash, Scala, sbt, Azure

Project
Bazar
Project Scope

The client is a trading technology company that provides a professional platform for futures trading. The company offers advanced charting tools, trade execution, market analysis, and supports the creation of automated trading strategies. In addition to its platform, the client also operates as a registered futures broker, giving users access to global futures markets and low-cost trading.

Tech stack

Scala 2, Akka Cluster, GCP, k8s, MySQL, Google/PubSub, Cloud Build/GitHub Actions

Team

6 Scala Developers, 4 TS (Fullstack) Developers, 2 DevOps Engineer, 1 ML Engineer

What we expect in general:

  • Strong proficiency in Scala and its ecosystem.
  • Ability to solve complex problems.
  • Experience with PostgreSQL (or other relational databases).
  • Knowledge about caching and queueing.
  • General knowledge about software engineering and good practices.
  • 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.
  • Good command of English (B2/C1).

A few perks of being with us

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

Apply now

Scala Engineer (Senior)

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Current recruitment process: For the purpose of recruitment, I hereby give consent as per art. 6.1.a of the GDPR to processing of my personal data (other than that listed in art. 22 [1] § 1 Labour Code) by Virtus Lab Sp. z o. o. (as Co-Controller for a full list of joint controllers, see Privacy Policy) with its headquarters at Szlak 49 Street, 31-153 Cracow. At the same time I accept the Privacy Policy of the Data Controller. I acknowledge that my personal data will be kept for the duration of the recruitment process and as regards any potential claims, for the period of 36 months maximum, and that I have the right to access this data or have it rectified or deleted on demand. This consent can be withdrawn at any time, but this withdrawal does not make the previous processing illegal*.

(Required)
Future recruitment processes: I hereby give consent as per art. 6.1.a of the GDPR to the processing of my personal data by Virtus Lab Sp. z o. o. (as Co-Controller for a full list of joint controllers, see Privacy Policy) with its headquarters at Szlak 49 Street, 31-153 Cracow, in order to use this data in future recruitment processes. I hereby agree to possible storage of my personal data for this purpose in Virtus Lab’s database for a period of 36 months maximum. At the same time I accept the Privacy Policy of the Data Controller. I acknowledge that I have the right to access this data or have it rectified or deleted on demand. This consent can be withdrawn at any point, but this does not make the previous processing illegal*.

Future recruitment processes: I hereby give consent as per art. 6.1.a of the GDPR to the processing of my personal data by Virtus Lab Sp. z o. o. (as Co-Controller for a full list of joint controllers, see Privacy Policy) with its headquarters at Szlak 49 Street, 31-153 Cracow, in order to use this data in future recruitment processes. I hereby agree to possible storage of my personal data for this purpose in Virtus Lab’s database for a period of 36 months maximum. At the same time I accept the Privacy Policy of the Data Controller. I acknowledge that I have the right to access this data or have it rectified or deleted on demand. This consent can be withdrawn at any point, but this does not make the previous processing illegal*.

Paulina Radzimowska
Coordinated by
Paulina Radzimowska
Senior IT Talent Acquisition Specialist
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Scala Engineer (Senior)
B2B21 000 - 27 000 PLN NET
LOCATION + Remote Poland: Kielce, Kraków, Wrocław
Apply now
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