ETL Developer with Python and PostgreSQL (M / F / D)

Technologies we use

Operating system

• Windows

About the project

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.

This project is carried out by a joint team from DATAGROUP Digital Solutions GmbH and DATAGROUP Polska Sp.z o.o. Both entities share responsibility for data protection. Applicants can exercise their data protection rights with either of the involved entities.

This is how we organize our work

This is how we work

• at the client's site
• you focus on a single project at a time
• you focus on product development
• agile

Your responsibilities

• 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.

Our requirements

• 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

What we offer

• 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

Benefits

• Employee referral program
• sharing the costs of sports activities
• private medical care
• remote work opportunities
• flexible working time
• fruits
• integration events
• no dress code
• coffee / tea

DATAGROUP POLSKA SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ

DATAGROUP is one of Germany’s leading IT service providers. Around 4,000 employees at locations throughout Germany design, implement and operate IT infrastructures and business applications such as SAP. With its CORBOX product, DATAGROUP is a full-service provider, supporting the IT workstations of medium-sized and large enterprises as well as public sector clients worldwide. The company is growing both organically and through acquisitions. Its acquisition strategy is characterised primarily by the optimal integration of the new companies. With its ‘buy and turn around’ or ‘buy and build’ strategy, DATAGROUP is actively participating in the consolidation process of the IT services market.

Find out more about the company on our website: https://www.datagroup.de/en/