We are looking for a Senior Full Stack Data Engineer to design, build, and productionize data-driven web applications and reporting tools. The role combines frontend development, backend Java services, and data engineering to deliver scalable, reliable analytics solutions. Send CV to ([email protected])Client: Global technology leader (search & data products)Location: Kraków, PolandWork mode: Hybrid – 3 days/week onsite (Kraków)Contract type: B2B Key ResponsibilitiesFrontend / Full StackBuild, test, and productionize web applications and reporting toolsDevelop interactive dashboards and data visualizations using:AngularTypeScriptDartd3.js / Dart chartsCollaborate closely with product and data stakeholdersBackend & Data EngineeringDesign and develop Java-based web services and APIsArchitect and maintain scalable ETL pipelines processing large volumes of logs and dataCreate and manage derived tables and materialized views for optimized reportingIntegrate multiple services and systems into seamless data workflowsProduction & ReliabilityPerform end-to-end testing to ensure quality, reliability, and performanceMaintain technical documentation, system designs, and data lineageDevelop and follow production playbooks (deployment, monitoring, on-call)✅ Required Qualifications10+ years of professional software engineering experienceStrong full stack development backgroundFrontend:AngularTypeScriptDartData visualization:d3.jsDart chartsBackend:Java (web services, APIs)Data engineering:ETL pipeline designProcessing large-scale logs / datasetsDerived tables & materialized viewsExperience with:End-to-end testingWriting clear technical documentationProduction support & reliability practices⭐ Nice to HaveExperience with large-scale data platforms in global tech environmentsFamiliarity with workflow orchestrationExperience integrating multiple services and systems