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

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

Link GroupWarsaw, Poland
19 days ago
Job description

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
  • 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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    Senior Java Developer • Warsaw, Poland

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