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. The candidate should take complete ownership of the architecture and engineering standards that future teams will build upon, fostering a culture of technical excellence. You will work on hard distributed systems problems in regulated environments where failure modes must be explicitly designed, audited, and traceable.
Responsibilities

Design and implement core services (identity, transactional flows, data integrity) within an event‑driven architecture.
Build asynchronous workflows with strong guarantees: idempotency, consistency, and auditability.
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.
Build resilient systems using circuit breakers, retries, timeouts, and graceful degradation patterns.
Manage schema evolution with zero‑downtime migrations (Flyway, Liquibase, or similar).
Integrate authentication and authorisation solutions (Keycloak or similar).
Write meaningful automated tests (contract, integration, e2e) as part of daily development.
Instrument services from day one (metrics, structured logging, tracing).
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.

Qualifications

Higher education diploma in Computer Science or a rel

📌 Group Senior Software Developer (Madrid)
🏢 Feg
📍 Madrid