Group Senior Platform Software Engineer - Madrid

Hey there! 

We're Fortuna Entertainment Group, and we’re excited to share why we’re a team worth joining. 

Who We Are?

Founded in 1990, FEG is a top player in the betting and gaming industry. We proudly serve millions of customers across five European countries – Czech Republic, Slovakia, Poland, Romania, and Croatia – with our Business Intelligence operations based in India. 

Why Join Us?

You’ll be part of a team that embraces bold ideas and delivers on its promises. We’re committed to providing exceptional betting and gaming experiences tailored to our customers’ needs, bringing fun and games to them. We also know that behind these experiences there is a great team, which is why we invest in and value each of our colleagues.

Where We Work?

We’re expanding our international presence by building a brand‑new hub in Madrid, strengthening our footprint in one of Europe’s most dynamic markets. At the same time, our headquarters and strategic heart of Fortuna Entertainment Group remain in Prague, where key decisions, cross‑market collaboration, and long‑term vision come together. This setup allows us to combine strong local expertise with a truly international way of working.

Current Opportunity:

Right now, we are´ seeking a Group Senior Platform Software Engineer to join our Group Technology Team in Spain (Madrid). You will be responsible for preparing test cases and their automation including data automation and 3rd parties mocking in Fortuna Entertainment Group. The candidate should be able to take complete ownership of the quality of a project, feature or system. You will ensure continuous development of test automation, analyze risks, write and execute a full spectrum of automated tests including their data provisioning or mocking. We will appreciate a flexible person with a strong testing and technical background that is able to work independently in a dynamic environment with frequent changes.

What You’ll Be Doing:

The main responsibilities are to:

• Design and implement core services (identity, transactional flows, data integrity) within an event-driven architecture.
• Build asynchronous workflows with strong guarantees: idempotency, consistency, 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 authorization 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 Backoffice 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.

What We’re Looking For:

You should have experience in:

• 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.
• Solid understanding of concurrency, transactions, and the JVM memory model.
• 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 containerized environments (Docker).
• Familiarity with caching strategies (Redis or similar).
• Security awareness (authentication flows, input validation, encryption in transit and at rest).
• Experience with observability tools (Prometheus, OpenTelemetry, or similar).
• Demonstrable curiosity and hands-on experimentation with AI-assisted development tools (GitHub Copilot, Claude, ChatGPT, Cursor, or similar).
• Fluent English and strong communication skills.

Nice to have:

• Experience in fintech, payments, iGaming, or other regulated domains.
• Keycloak customization or identity federation.
• Experience building internal tools or Backoffice applications with a modern JavaScript/TypeScript framework (React, Vue, Angular, or similar).
• Kubernetes experience.
• Stream processing (Flink or similar).
• Event schema evolution (Avro/Protobuf, Schema Registry).
• Experience in small, high-ownership teams.

Why You’ll Love It Here:

The specific compensation and benefits associated with this role may differ based on the hiring location, in order to remain compliant with local practices and competitive within each market. 

If this sounds like your kind of place, let us know by applying! We can’t wait to hear from you.

#LI-JB1 

#LI-Hybrid