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Data Engineer Miejsce pracy: Warszawa Rekrutujemy dla We are recruiting for a client from the energy sector who is building an internal application supporting back-office operations, risk analysis, and process optimization. Technologie u pracodawcy System operacyjny Windows Twój zakres obowiązków Design, build, and maintain end-to-end ETL/ELT pipelines (Python/SQL). Orchestrate workflows using Apache Airflow (scheduling, retries, SLA management, monitoring). Design and implement data models (staging → core → marts) for reporting and application/API consumption. Implement automated data quality controls: completeness, consistency checks, reconciliation, anomaly detection, and alerting. Integrate with source systems (databases, APIs, files) and publish processed datasets to relational databases. Define and maintain data contracts and metrics in collaboration with backend and business stakeholders. Maintain clear documentation (field definitions, lineage, schema evolution). Improve reliability and reduce manual interventions (runbooks, debugging, observability). Wymagania pracodawcy Strong SQL expertise and hands-on experience in relational data modeling (MySQL/PostgreSQL). Production experience with Python in a data engineering context (integrations, transformations, automation). Practical experience with Apache Airflow (or another orchestrator), including SLA and monitoring mindset. Strong data quality ownership: testing, validation, reconciliation, debugging, accountability for outcomes. Experience working with Git in a collaborative environment (code reviews, versioning). Polish (C1/C2) and English (min. B2). Mile widziane Experience with Kafka/streaming or CDC (for near-real-time data refresh). Experience with dbt or similar SQL transformation/testing frameworks. Pracodawca oferuje Competitive salary ranging from 18 000 to 24 000 PLN monthly Health insurance, cafeteria card, language lessons Opportunities for career development within the Technology department.