Staff Backend Engineer – Real-Time Sports Platform

LeoVegas Group; Warszawa; Hybrid; PLN 260,000 - 380,000; Full time

Benefits offered by this job

Competitive salary package

Hybrid work policy

Workation benefits

Private medical care & insurances

Sports card

Training budget

ICAS assistance programme

Snacks & breakfasts in office

Team events

Gym in building

MacBook Pro & iPhone

Job summary

LeoVegas Group is seeking a highly experienced Staff Backend Engineer to lead design, development and evolution of distributed systems in a fast-paced sportsbook platform. You will provide technical leadership while remaining hands-on, mentoring teams, shaping architecture and driving reliability in production.

The role focuses on scalable, event-driven backends, observability, and high-performance systems. A hybrid work setup in Poland is offered with competitive compensation and benefits.

Qualifications

• 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.

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 optimisation, 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.

Skills

Distributed systems design

Java (21+)

Reactive programming

Kafka & event-driven

Redis & caching

SQL & NoSQL databases

Observability & debugging

System design & decisions

Stakeholder communication

Tools

Kubernetes

AWS

GCP

OpenSearch/Elasticsearch

Job description

LeoVegas Group is seeking a highly experienced Staff Backend Engineer to lead design, development and evolution of distributed systems in a fast-paced sportsbook platform. You will provide technical leadership while remaining hands-on, mentoring teams, shaping architecture and driving reliability in production.

The role focuses on scalable, event-driven backends, observability, and high-performance systems. A hybrid work setup in Poland is offered with competitive compensation and benefits.