Cooperation model: hybrid (remote + on-site in Warsaw office, 2 times per month)Required Skills (must have): Minimum 2 years of professional experience in Spark  Technical background (IT/Engineering studies) Solid understanding of Big Data concepts, Data Warehousing, and Data Management Experience with Hadoop platforms (Cloudera/Hortonworks) Knowledge of engineering best practices for large-scale data processing: design standards, data modeling techniques, coding, documenting, testing, and deployment Hands-on experience with data formats: JSON, PARQUET, ORC, AVRO Understanding of database types and usage scenarios (Hive, Kudu, HBase, Iceberg, etc.) Advanced SQL skills Experience integrating data from multiple sources Familiarity with project/application build tools (e.g., Maven) Nice to Have:

• Practical knowledge of Agile methodologies and tools (Jira, Confluence, Kanban, Scrum)
• Experience with Kubeflow
• Knowledge of streaming technologies such as Kafka, Apache NiFi
• Familiarity with CI/CD automation processes and tools Margo Offers:
• Salary range per month or rate per day
• Permanent contract or B2B cooperation,
• Collaboration with highly skilled specialists in a large enterprise environment
• Co-financing trainings, certification exams and post-graduate studies,
• Internal training and the possibility of using our know-how
• Excellent working atmosphere, integration events.