We are seeking a Principal Java Engineer with more than 10 years of experience in designing and building Java applications with a proven track record of modernising legacy applications in regulated environments. In this role, you will drive cloud-based transformations, design microservices platforms, and mentor developers through complex technical transitions. Your expertise in cloud, DevOps, microservices, and API design will be critical in migrating customer data and ensuring high-performance, scalable, and compliant solutions.

Experience in iGaming is a strong plus.Technical Leadership &

• ModernisationLead themodernisation of legacy applications, ensuring they meet regulatory standards while improving performance, scalability, and maintainability.Design, develop, and deploycloud-native microserviceson AWS.Architecthigh-performance, large-scale applications in Java, optimising for efficiency, reliability, and security.Cloud &

• DevOps TransformationDrivecloud migration strategies, including lifting, shifting, and refactoring applications for cloud compatibility.Prometheus, Grafana, ELK). Ensure seamlesscustomer data migrationbetween platforms, maintaining data integrity, security, and compliance.Microservices &

• API DevelopmentDesign and implementscalable microservices architectures in Java, leveraging RESTful APIs, with event-driven systems (e.Kafka, RabbitMQ). IntegrateAI-driven solutionsto enhance application intelligence, automation, and user experiences.Mentorship &

• CollaborationMentor junior and mid-level developers, fostering aculture of code quality, innovation, and continuous learning . Lead code reviews, architectural discussions, and troubleshooting to ensure high standards of engineering excellence.Strong focus on automation,



levergaing pipelines and AICompliance &

• Data ManagementEnsure all solutions adhere toregulatory and security standards(e.GDPR, PCI-DSS, or iGaming regulations). Implementdata protection best practicesfor managing and migrating customer data in compliance with industry regulations.Work closely with legal and compliance teams to mitigate risks and ensure auditability.15+ years ofexperience in Javaand large-scale, high-performance applications (e.Spring Boot). Hands-on expertise incloud platforms(AWS, Azure, or GCP) andmicroservices architecture.Strong understanding ofDevOps, including CI/CD (Jenkins, GitLab CI), containerisation (Docker, Kubernetes), and infrastructure automation (Terraform, Ansible). Prometheus, ELK Stack) and performance tuning.online casinos, sports betting, or fintech for gaming). Knowledge of event-driven architectures (Kafka, RabbitMQ) and serverless technologies.TensorFlow, PyTorch) and their integration into applications.Work on high-impact, transformative projects that shape the future of our regulated business.A competitive and attractive salaryPrivate health insuranceAnnual wellbeing benefit allowanceSocial events for building strong relationships with colleaguesAbout LCKY Group:LCKY Group brings together a portfolio of leading online casino brands - LuckyCasino, HappyCasino, FlaxCasino, Vera&John;, OneCasino and RoyalCasino - alongside its in-house game studio, Swintt. The Group is home to a diverse and multiskilled workforce, based in a range of locations, includingMalta, Stockholm, Sofia, Barcelona, Hoorn, Estepona, Gibraltar and Melilla.The Group also operates in theB2Bvertical through its in-house game development studio, Swintt, which delivers high-quality slot games to operators worldwide.

📌 Principal Java Engineer (Madrid)
🏢 LCKY Group
📍 Madrid