ETL Developer with Python and PostgreSQL (m / f / d)

DATAGROUP Polska Sp. z o.o. is looking for a skilled Python and PostgreSQL Developer to support our ongoing technology refresh and migration initiatives. This is a mid-level position offering remote flexibility and the opportunity to work on forward-looking IT projects that involve modernizing legacy systems and migrating to cloud and open-source platforms.

• Design and implement Python components for the ETL process.
• Contribute to the migration from Oracle to PostgreSQL.
• Collaborate with cross-functional teams on application modernisation and cloud migration efforts.
• Ensure code quality, performance, and maintainability throughout the development lifecycle.

We are looking for a motivated young professional with a passion for Python development and a keen interest in IT. The ideal candidate should possess the following skills and qualifications:

• Good knowledge and several years of practical experience in Python development
• Solid skills in Postgres and SQL
• ETL experience is desirable
• Strong analytical skills, a solution-oriented mindset, and the ability to work independently
• Experience in conceptual work
• Excellent understanding of data
• Independent and structured working style
• Very good command of English, both spoken and written

• Migrate ETL pipelines from IBM Datastage and Oracle using Python to extract data from various sources, transform it according to business rules, and load it into PostgreSQL databases.
• Collaborate with data architects and stakeholders to understand data requirements, model data flows, and define transformation logic.
• Implement efficient SQL queries, stored procedures, and functions in PostgreSQL to support data integration and reporting needs.
• Optimize ETL processes for performance, scalability, and resource usage, including query tuning in PostgreSQL.
• Build and maintain data validation and quality checks, including automated tests, reconciliation scripts, and alerting for data anomalies.
• Monitor ETL jobs and database health, diagnose failures or performance issues, and implement fixes or improvements.
• Document ETL processes, data dictionaries, lineage, and operational runbooks to ensure maintainability and team knowledge transfer.
• Troubleshoot cross-system data issues, participate in incident response, and provide root cause analysis and remediation plans.
• Participate in code reviews, mentor junior developers, and contribute to improving team standards and best practices.

At DATAGROUP Polska Sp. z o.o., we value our employees and offer a comprehensive benefits package to support your professional and personal growth:

• Flexible working hours and remote work options (Poland only).
• Open and cooperative corporate culture and a trusting working atmosphere
• Flat Hierarchies and Short Decision Paths
• Individual training opportunities and interesting technical challenges
• Social benefits