Kafka Data Platform Developer/Analyst

Quick Facts

• Role: Data Platform Developer/Analyst (Kafka)

• Focus: Kafka-based data platform development, data mapping, microservices, and streaming/query integration

• Work style: Hybrid (Wrocław, 2 days/month) + ability to work in Poland

Description

You will analyze data requirements and map information between source systems, a streaming platform, and an ODS database.

You will design and implement data-platform solutions, including microservices, a query layer exposing data, and communication/data-integration structures.

You will also implement monitoring and observability, troubleshoot data-flow issues, and optimize performance and costs in an Agile (Scrum/Kanban) team.

Responsibilities

• Analyze requirements and translate business needs into technical specifications and data mapping

• Design and implement data-platform solutions (microservices, query layer, communication structures)

• Integrate data between systems (sources → streaming platform → ODS)

• Implement metrics/observability and diagnose streaming/data-flow problems

• Optimize performance and cost; provide operational support

• Work in an Agile environment (Scrum/Kanban, Jira/Confluence)

Requirements

Must have:

• 3+ years of production experience with Apache Kafka (brokers, topics, partitioning, schemas, replication)

• Fluent Kafka Streams and kSQL

• Kafka Connect experience (configuring and developing ready and custom connectors)

• Strong Spring Boot skills: fluent Java and Spring framework (Boot, Cloud, Security, Data) and knowledge of Python

• MongoDB experience (document schema design, indexing, query optimization)

• GraphQL experience (service implementation, schema definitions, resolvers)

• Basic knowledge of Apache Iceberg (table formats, metadata management)

• Monitoring/observability tools knowledge (Prometheus, Grafana, OpenTelemetry)

• Data security knowledge (TLS, SASL, ACL; encryption in transit and at rest)

• Agile experience (Scrum/Kanban, Jira/Confluence)

• Ability to analyze business requirements and communicate with stakeholders; create use-case/user-story documentation

• Hybrid work readiness (Wrocław, 2 days/month)

• Eligibility to work in Poland (citizenship, residence permit, visa, etc.)