Senior Software Engineer – Group Technology Team (Madrid, Hybrid)
We are seeking a Senior Software Engineer to join our Group Technology Team in Madrid (Hybrid). You will be responsible for designing and delivering a next‑generation Player Account Management platform, engineered for transactional correctness, data integrity, and operational resilience. Design and implement core services (identity, transactional flows, data integrity) within an event‑driven architecture.
Design high‑performance REST APIs with clear contracts and versioning.
Implement distributed transaction patterns (sagas/orchestration or choreography) and reason about compensation and eventual consistency.
Apply concurrency control (optimistic/pessimistic locking, distributed locking) to ensure correctness under concurrent writes.
Integrate authentication and authorisation solutions (Keycloak or similar).
Write meaningful automated tests (contract, integration, e2e) as part of daily development.
Build back‑office tools and embeddable UI widgets on top of the platform APIs.
Contribute to infrastructure, CI/CD,



and DevOps practices in collaboration with the team.
Use AI‑assisted development tools pragmatically to improve productivity and quality.
Higher education diploma in Computer Science or a related field, or equivalent practical experience.
~8+ years of backend engineering experience in systems where correctness and reliability mattered.
~ Strong Java and Spring Boot experience in production environments.
~ Production experience with messaging systems (Kafka, RabbitMQ, or similar).
~ Strong SQL knowledge: transactions, isolation levels, indexing, performance tuning.
~ Experience with distributed systems and eventual consistency patterns.
~ Experience with containerised environments (Docker).
~ Familiarity with caching strategies (Redis or similar).
~ Experience with observability tools (Prometheus, OpenTelemetry, or similar).
~ Demonstrable curiosity and hands‑on experimentation with AI‑assisted

📌 (Senior) Software Engineer (España)
🏢 Feg
📍 España