Job Description, Responsibilities & Requirements
About the Position
Staff Backend Engineer - Sports Engineering
Company: LeoVegas Polska
Location: Warsaw, Poland
Employment Type: Full-Time
Date Posted: 2026-05-06
About the Role
LeoVegas Group is building a world-class Sportsbook platform. Within the Sports domain, we work in a high-volume, real-time environment where speed, correctness, scalability, and reliability are critical, building the services that transform incoming sports, trading, and pricing data into experiences used by millions of customers.
We are looking for a highly experienced Staff Backend Engineer to help lead the design, development, and evolution of these distributed systems. You will provide technical leadership across architecture, engineering practices, and platform evolution while remaining hands-on, helping teams make better technical decisions, raise engineering standards, simplify complex systems, and balance business needs with long-term platform health.
This role suits someone who enjoys understanding the technical and business context behind problems rather than implementing solutions mechanically. We value engineers who are curious and proactive, comfortable with ambiguity, and who lead through collaboration and ownership rather than authority.
Responsibilities
- Lead architecture and design discussions for scalable, resilient, and maintainable distributed systems, evaluating options through spikes, experiments, and proofs of concept.
- Drive simplification of complex systems while holding a high bar for performance, reliability, and code quality.
- Identify scalability, resiliency, and operational risks before they reach production, and lead root cause analysis when incidents occur.
- Improve observability, monitoring, and operational readiness, and drive down technical debt across the platform.
- Promote best practices around event-driven and reactive architectures, performance optimization, testing, automation, and CI/CD.
- Mentor engineers through design reviews, code reviews, pair programming, and technical guidance.
- Partner with Product, Engineering Managers, and Architects to translate business problems into practical solutions, and help shape and break down technical initiatives.
- Contribute to a culture of ownership, collaboration, continuous improvement, and engineering excellence.
Requirements
Essential Skills
- Proven experience designing, building, and operating distributed systems at scale, owning complex backend systems end-to-end in production.
- Strong backend expertise in Java (preferably 21+), with a solid understanding of JVM internals, concurrency, and multithreading.
- Hands-on experience with Reactive Programming and non-blocking systems using Spring Boot and/or Vert.x.
- Hands-on experience with Apache Kafka and event-driven architectures; familiarity with streaming and messaging technologies such as Redis or NATS.
- Experience with Redis for caching and low-latency data access, and with SQL and NoSQL databases (e.g., PostgreSQL, MariaDB, MongoDB).
- Experience with observability and monitoring platforms such as Datadog, Grafana, or Kibana, and with debugging complex production incidents.
- Strong system design and architectural decision-making, balancing latency, throughput, consistency, operational complexity, and maintainability.
- Ability to influence technical decisions and communicate effectively with engineers, architects, product managers, and other stakeholders.
Nice to Have
- Experience with Kubernetes, AWS, and/or GCP, and cloud-native architecture patterns.
- Experience with OpenSearch and/or Elasticsearch for search, analytics, and operational troubleshooting.
- Experience building internal platforms, shared frameworks, or developer productivity tooling, with a strong SRE mindset.
- Experience within sports betting, gaming, or other real-time, data-intensive domains.
We Offer
- Competitive salary aligned with your experience, expertise, and impact.
- A collaborative, inclusive, and fast-paced engineering environment where ideas are welcomed, ownership is encouraged, and continuous learning is valued.
- Hybrid work policy.
- 4 weeks of Workation (T&C apply).
- Benefits package - 800 PLN net (B2B)/gross (UOP) monthly with access to the cafeteria platform (private medical care, insurances, sports card).
- Training budget.
- ICAS's assistance program can provide help and guidance during challenging moments.
- Our office provides complimentary snacks and drinks; on Mondays, we serve complimentary breakfast.
- Team and office social events throughout the year.
- Free parking for bicycles and motorcycles.
- Free gym in the building.
- Equipment: MacBook Pro + smartphone (iPhone 16/17 or Samsung Galaxy S25).
About the Company
At the core of LeoVegas Group is Team Leo. Our culture is our foundation and is what enables us to innovate, build, and lead as we trailblaze our way through the igaming industry. We’re a team of over 2000 innovators, initiators, and groundbreakers working in a fast-paced and agile environment across 21 offices worldwide.
Join Us!
In our pride, we empower our teammates to find their roar and run with their wildest ideas. We don’t wait for things to happen; we pounce and make it happen!
Would you be a good fit for the Leo Pride - give us a roar!
As our company's working language is English, we’d like to see your CV in English, please
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