Senior Java Developer – Real-Time Event-Driven Systems @ Link Group

5 days ago

Warsaw, Czech Republic Link Group Full time

7+ years of professional experience in Java development  Strong hands-on skills in Java, Spring Boot, Reactive programming (RxJava)   Proven experience with Kafka in production systems  Solid understanding of event-driven architecture and data serialization   Practical experience with microservices, containerization, and cloud deployment (OpenShift / Kubernetes / Helm / Docker)  Good understanding of SQL databases (Oracle) and distributed data stores (Hazelcast, Cassandra)  Familiarity with CI/CD pipelines (preferably Azure DevOps)  Experience with monitoring tools such as ELK, Prometheus, Grafana   Strong problem-solving and debugging skills  Fluent English communication skills (spoken and written)  Nice to Have Experience in financial systems, especially trading, pricing, or risk-related applications  Knowledge of derivatives or e-trading workflows   Background in high-performance or low-latency systems   Familiarity with React and TypeScript for full-stack development  Exposure to DevOps practices and automated deployment processes  We’re looking for a Senior Java Developer to join a global engineering team building a large-scale, event-driven platform for pricing, trade execution, and processing in the financial markets domain. The system supports multiple trading desks and asset classes — including FX Options, Interest Rate Derivatives, Commodities, and Credit Derivatives — providing real-time pricing, risk, and booking capabilities. You will work on a distributed microservices architecture, leveraging Kafka, Reactive programming, and Spring Boot to build scalable and performant systems that handle large volumes of real-time data. Why Join Work on a strategic real-time financial platform with a global impact Engage in complex, large-scale engineering challenges Collaborate with international teams and domain experts Be part of a strong technical culture — open, intellectual, and delivery-focused Opportunity to shape architecture and influence technical direction ,[Design, implement, and maintain microservices using Java, Spring Boot, and RxJava , Develop event-driven systems based on Kafka and WebSocket communication , Participate in the full software development lifecycle — from requirements to production release , Collaborate with business analysts, developers, and stakeholders across global teams (Europe & Asia) , Optimize application performance and ensure system reliability , Write efficient, testable, and well-documented code following best engineering practices , Contribute to technical design discussions and architecture evolution , Support and mentor other developers within the local team ] Requirements: Java, Kafka, Spring Boot, Microservices, RxJava, WebSocket, OpenShift, Kubernetes, Helm, Docker, SQL, Oracle, Hazelcast, Prometheus, Cassandra, CI/CD Pipelines, Azure, DevOps, ELK Stack, Grafana, Communication skills, React, TypeScript Additionally: Integration events.

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