java developer in iGaming

GR8_TECH builds B2B iGaming platforms for operators. Its platform provides integrations, consulting, and operational support, powers millions of active players, and supports business growth across brands, markets, and geographies.

• Design and develop Spring Boot microservices across the casino domain, including bonus processing, game launch, lobby, and game catalog management;
• Implement and evolve promotional mechanics from bonus crediting and wagering logic to expiry and settlement with correctness guarantees for real-money operations;
• Integrate third-party game providers, game launch, wallet callbacks, and provider-side bonus features;
• Build and evolve REST APIs for internal services and external providers, including request signing, authentication, and API versioning;
• Ensure correctness of real-money transaction and bonus flows through idempotency, retries, timeouts, and graceful degradation of downstream calls;
• Work with Redis for caching and session state and tune service performance under production load;
• Own observability through metrics, structured logging, dashboards, and alerting;
• Write and maintain unit, integration, and functional tests;
• Ship services via GitLab CI to Kubernetes;
• Participate in code reviews and incident investigations.

• 5+ Years of back-end experience;
• Strong commercial proficiency in Java 17+ and Spring Boot 3.x, including Web, Security, Data, and Actuator;
• Experience building business-critical domain logic involving payments, bonuses, billing, or similar money-adjacent flows;
• Experience integrating third-party REST APIs and designing own APIs;
• Understanding of distributed systems basics, including idempotency, consistency, timeouts, retries, and caching;
• Experience with SQL and at least one NoSQL store: Redis, Cassandra, or Elasticsearch;
• Upper-intermediate or higher level of English;
• Nice to have: Scala, Kafka and event-driven architectures, Kubernetes, GitLab CI, Prometheus, Grafana, iGaming or betting domain experience.

• Benefits cafeteria with an annual budget for sports, medical care, mental health, home office, and language learning;
• Paid maternity and paternity leave;
• Monthly childcare allowance;
• 20+ Vacation days;
• Unlimited sick leave;
• Emergency time off;
• Tech support and coworking compensation;
• Online, offline, and offsite team events;
• Internal courses and growth programs.