Middle Java Engineer (Payments)

About Patrianna Patrianna is a fast-scaling product development company headquartered in Gibraltar, with a dynamic, global team powering our growth. We operate at the intersection of technology and entertainment, building innovative solutions that shape the future of social gaming and deliver outstanding experiences to millions of players worldwide. We’re driven by speed, ambition, and bold ideas. At our core, we’re product creators and problem-solvers who thrive in a high-performance environment. We’re looking for exceptional talent-smart, adaptable, and motivated individuals eager to make an impact, scale business functions at pace, and continuously improve. AI-DRIVEN ENGINEERING CULTURE We are actively building an AI-driven engineering organization with a clear and deliberate stance: artificial intelligence is a core part of how we build and deliver software — not an experiment, not a trend, and not an optional add-on. AI is embedded into our engineering workflows, from system design and prototyping to refactoring, testing, and code review. We expect engineers to be fully comfortable working in AI-driven environments and to treat AI as a primary productivity multiplier. Strong engineering judgment, architectural ownership, and accountability remain essential—AI amplifies our engineers, it doesn’t replace responsibility for technical decisions. What you will be doing • Develop and maintain robust Java applications using cutting-edge technologies like Java, Spring, and Kafka • Optimize SQL performance and troubleshoot complex systems using metrics, monitoring, and profiling tools • Build scalable, high-load systems that handle massive user volumes with seamless performance • Collaborate with cross-functional teams to deliver features that directly impact player experience • Implement automation and ensure code quality standards across development and production environments • Work with modern tech stack including Docker, GCP, ELK, and reactive programming frameworks Main technologies we use: Java 25 Spring 7 Spring boot 4 Ebean-ORM Quartz Maven Resteasy Flyway Postgresql 15 HTTP/Websockets Netty K8S/Docker GCP Jenkins ELK, Grafana Google Business Suite, JIRA/Confluence, Slack What we are looking for • Solid experience as a Java Engineer with strong knowledge of Java Core (Java 8+) • Expertise in multithreading, high-load systems, and Spring framework • Proven experience with SQL optimization and troubleshooting complex production issues • Background working in product companies within collaborative, cross-functional teams • Strong English communication skills for effective collaboration • Passion for delivering high-quality code and driving technical excellence Would be a plus: • Production experience with Kafka and ecosystem • Experience with Ebean • Experience with Protobuf • Experience with Kibana/ElasticSearch • Experience with Grafana Why you will love it You’ll be at the forefront of AI-driven engineering in a fast-scaling environment where your code directly impacts millions of users. Work with cutting-edge technology (latest Java, Spring Boot, GCP, Kubernetes) while enjoying full remote flexibility, generous leave, and real opportunities for growth. Join a team that treats AI as a core engineering tool—not an experiment—and where engineering excellence, speed, and meaningful impact are part of everyday work.