We're hiring: Senior Java Developers i Gaming / Sportsbook / Online Casino | Senior Java Backend | Kafka or Rabbit MQ | Hybrid in Madrid.
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Salary: From €65k to €70k gross/year (DEO) + 10% bonus Ideally with experience in payments, i Gaming/Gambling or Fin Tech (integrations and payments gateways)My client in the i Gaming 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 Overview We are looking for a Senior Java developer 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, Dev Ops,



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 payments, i Gaming or Fin Tech industry1+ years of experience with platforms integrations and payments gateway.2+ years of experience with Kafka or Rabbit MQ.
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. xqbhyrx
Contribute to internal tools, CI/CD, infrastructure, and leverage AI tools to enhance development efficiency.

📌 Senior software engineer (España)
🏢 Pentasia
📍 España