Data Engineer (Kafka/ Flink)

In Halcyon Labs we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are seeking an experienced Data Engineer to design, build, and evolve data-driven services and streaming pipelines. You will work closely with business requirements and product teams to deliver robust, scalable, and high-performance solutions in a modern cloud and streaming environment. Project information: Type of project: core data platform for global logistics Office location: Warsaw, Poland Work mode: Remote from Poland Budget: 110-130 PLN net/ h- b2b Project length: Tiill the end of 2026, possible to extend it Only candidates with citizenship in the European Union and residence in Poland Start date: ASAP (depending on candidate’s availability) Project scope: Implement features and user stories based on business requirements Develop and deliver sprint backlog items end-to-end Build and maintain stream processing pipelines using Kafka and Apache Flink Develop backend services using Java (Spring / Quarkus) Ensure strong test coverage and code quality Implement and evolve Avro schemas with Schema Registry Maintain and improve data integration flows across systems Monitor and fine-tune application and streaming performance Contribute to architecture improvements and design decisions Work with AWS services (Lambda, DocumentDB, S3) for supporting platform components Collaborate with cross-functional teams in an agile environment Competence demands: 6+ Years of experience with Kafka/ Flink Apache Kafka / Confluent (producers, consumers, Kafka Connect) Apache Flink (stream processing, stateful/stateless concepts) Strong experience in Java (with Spring and/or Quarkus) Experience with Avro schema design Hands-on experience with Confluent Schema Registry and API usage Experience with AWS services (such as Lambda, DocumentDB, S3, etc.) Strong understanding of event-driven architectures Very good English skills Nice to have: Terraform, Python Snowflake AsyncAPI BDD / Cucumber GitOps / CI/CD (PR-based workflows, GitFlow) We offer: Remote working model Dynamic and innovation-driven engineering environment Full-time job agreement based on b2b Private medical care with dental care (covering 70% of costs) Multisport card (also for an accompanying person) Life insurance