Ukraine onlyFrom our hubs in Ukraine, Georgia, the UK, and the Philippines, we blend real-world experience, a battle-tested Tech Radar, all within an open-door culture.
Turnkey isn’t just our biggest team — it’s the engine room of everything we build.
It’s the tech our partners bet their business on: no patchwork, no plug-ins. Just one battle-tested ecosystem designed to launch, grow, and lead in the most dynamic markets.
Turnkey unites VeliHorizon (our core platform), VeliX (the experience layer), and VeliPayments — the trio powers every player's journey and operator’s next big leap.
We invite a Senior Scala/Java Engineer to join the VeliHorizon (Reward) team.
VeliHorizon — our battle-tested platform built on real gaming floors. High-performance, microservices at its core, API-first by design — it keeps operations smooth, data sharp, and transactions flying.
Every click, spin, and payout runs through Horizon — proven in the toughest conditions, powering thousands of moments a second. Built by cross-functional teams who own every detail — from first idea to live performance.
In this role, you will:
- Proficiency in Java with practical experience using Quarkus(Rest, Mutiny, Reactive PG SQL), or similar Spring Framework, Vert.x
- Scala development experience required. Akka or ZIO will be a huge advantage
- Strong understanding of functional programming principles and best practices.
- Practical experience of JVM application garbage collection, memory management, understanding and troubleshooting
- Solid experience with Kafka (event-driven architecture, message delivery semantics, stream processing).
- Strong command of relational databases, especially PostgreSQL.
- Experience designing and maintaining RESTful HTTP APIs for client communication.
- Hands-on experience with gRPC for efficient inter-service communication.
- Understanding and application of Clean Architecture principles in designing modular and maintainable systems.
System Architecture and Infrastructure:
- Experience working in distributed microservice environments with domain-driven service decomposition.
- Understanding of asynchronous messaging patterns and event-driven communication, especially over Kafka.
- Good understanding of CAP theorem, message delivery strategies (at-most-once, at-least-once, exactly-once), and fault tolerance in distributed systems.
- Hands-on experience deploying and managing applications in Kubernetes, using containerd or other container runtimes.
- Software Design and Engineering Best Practices:
- Deep understanding of software design principles: SOLID, GRASP, and other key OOP/FP paradigms.
- Ability to write clean, maintainable, and well-tested code.
- Experience with concurrent and parallel programming, thread management, and async task orchestration
- Experience with high-load, low-latency systems, with the focus on reliability and latency optimisation
Will be a plus:
- A relevant university degree in Computer Science, Software Engineering, or a related field is preferred.
- Experience with Akka, ZIO, and the Slick library
- Familiarity with Elasticsearch and its integration in search-heavy services.
- Experience with Grafana, Prometheus (ViktoriaMetrics), ELK, or other monitoring solutions.
- Familiarity with CI/CD workflows and observability tools.Familiarity with analytical databases, especially ClickHouse.
Hiring process: Intro Call with TA Specialist → Technical Interview (with Live coding session)→ Final interview → Offer
Benefits:
Level up daily. Real mentorship, a clear career path, and support to lead your product.
Battle-tested tech stack. Work with what we bet on: microservices, serverless, SRE strength.
Health comes first. Insurance and 10 days' sick leave — because your health is a priority.
Work your way. Remote, hybrid, Kyiv office — find your rhythm.
Time off that matters. 20 days paid vacation, public holidays — to recharge your way.
Build your brand. Share your story, grow your voice — inside and out.
Culture with a pulse. Team offsites, community events, and the energy of people who care.
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