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 Stack Build, test, and productionize web applications and reporting tools Develop interactive dashboards and data visualizations using: Angular TypeScript Dart d3.js / Dart charts Collaborate closely with product and data stakeholders Backend & Data Engineering Design and develop Java-based web services and APIs Architect and maintain scalable ETL pipelines processing large volumes of logs and data Create and manage derived tables and materialized views for optimized reporting Integrate multiple services and systems into seamless data workflows Production & Reliability Perform end-to-end testing to ensure quality, reliability, and performance Maintain technical documentation, system designs, and data lineage Develop and follow production playbooks (deployment, monitoring, on-call) ✅ Required Qualifications 10+ years of professional software engineering experience Strong full stack development background Frontend: Angular TypeScript Dart Data visualization: d3.js Dart charts Backend: Java (web services, APIs) Data engineering: ETL pipeline design Processing large-scale logs / datasets Derived tables & materialized views Experience with: End-to-end testing Writing clear technical documentation Production support & reliability practices ⭐ Nice to Have Experience with large-scale data platforms in global tech environments Familiarity with workflow orchestration Experience integrating multiple services and systems