Senior Java DevelopersiGaming / Sportsbook / Online Casino | Senior Java Backend | Kafka or Rabbit MQ |Hybrid in Madrid.

Salary:
From €65k to €70k gross/year (DEO) + 10% bonusMUST have iGaming/Gambling or FinTech experience (integrations and payments gateways)My client in the iGaming industry (online Casino and Sportbooks) is looking for a Senior Java developer, to work hybird from Madrid (3 days in the office, 2 days remote). Role OverviewWe are seeking a Senior backend engineer to build and scale core platform services in a distributed, event-driven environment. The role focuses on designing reliable, high-performance systems, including APIs, asynchronous workflows, and distributed transactions. You will ensure system resilience, data integrity, and observability while contributing to testing, security, and CI/CD practices. Collaboration with engineering, DevOps, and compliance teams is key to shaping architecture and maintaining high standards across performance, scalability, and reliability.




Skills & Experience8+ years of experience with Java, 5+ of experience with Spring, Springboot and Microservices1+ years of experience within the iGaming or FinTech industry1+ years of experience with platforms integrations and payments gateway.2+ years of experience with Kafka or RabbitMQ.1+ year of experience with Redis (cashing system)

Key Responsibilities
Develop and maintain core backend services (identity, transactions, data integrity) within an event-driven architecture.
Build reliable, asynchronous workflows and high-performance APIs with proper versioning and consistency guarantees.
Implement distributed transactions, concurrency controls, and resilience patterns to ensure system stability and correctness.
Manage database evolution, security (auth/authz), testing, and observability across services.

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