**Workplace: Gdańsk** **Ref. No.: 49/DSH/EITE/2025** Publication end date: 12\.11\.2025 Your Responsibilities * Maintaining and implementing ETL processes in Oracle and Big Data environments * Maintaining and implementing solutions using Spark/Hadoop technology ensuring efficient processing of large data volumes * Monitoring and optimizing database and data processing performance * Ensuring solution compliance with security and data integrity requirements * Supporting diagnosis and resolution of incidents related to the data layer * Maintaining code quality and ensuring compliance with corporate standards * Preparing and maintaining environment documentation * Supporting testing phases of developed solutions * Collaborating with analysts and testers throughout software development and maintenance cycles up to third-line support * Participating in CI/CD processes – code reviews, deploying fixes, maintaining repositories Our Requirements * Very good knowledge of relational databases (Oracle preferred) * Good knowledge of PL/SQL * Experience in designing and implementing ETL solutions * Good knowledge of Java or Scala * Experience with tools supporting ETL process orchestration (Apache Airflow preferred) * Good knowledge of Hadoop environment (HDFS, Parquet, Yarn, Zookeeper, Livy, Hive) * Very good knowledge of Spark environment * Knowledge of NoSQL solutions (Hbase, Cassandra) * Knowledge of code versioning tools (GIT, FlyWay, LiquiBase) * Ability to work in a team and with external clients * Experience working with very large data volumes (>100 billion records) * Higher education required * Effectiveness in action * Business responsibility * Orientation towards continuous development and drawing from diverse perspectives * BIG DATA analysis Nice to Have * Familiarity with notebook tools such as Apache Zeppelin, Apache Jupyter * Knowledge of Azure DevOps tools * Knowledge of Spring Boot framework * Knowledge of integration topics (REST, SOAP, file interfaces, XML, XSD, json, OpenAPI) * Knowledge of Kubernetes platform (Rancher) * Knowledge of Docker Swarm platform * Familiarity with energy industry * Knowledge of MDM (Meter Data Management) class solutions * Experience in Python programming We Offer * Attractive remuneration and stable employment * Diverse team of employees * Work in a modern, international corporation * Opportunity to work with experts from various fields * Participation in large, innovative projects * Access to modern tools and work methods * Benefits * private medical care * training and course funding * life insurance * pension plan * additional social benefits * vacation funding * charitable initiatives * additional leave * sports card * tickets to events sponsored by the Group * bonus incentive system