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

DATAGROUP SE; Kraków; Remote; PLN 120,000 - 160,000; Full time

Benefits offered by this job

Flexible working hours

Remote work options (Poland only)

Flat Hierarchies

Training opportunities

Social benefits

Job summary

DATAGROUP Polska Sp. z o.o. seeks a mid-level Python and PostgreSQL Developer to support technology refresh and cloud migration.

You will design Python components for ETL, migrate from Oracle to PostgreSQL, and work on application modernisation with cross-functional teams.

Applicants should have strong Python, SQL/PostgreSQL, and ETL skills, plus English proficiency and independent working style.

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 and ability to work independently.
• Excellent understanding of data and data flows.

Responsibilities

• Migrate ETL pipelines from IBM Datastage and Oracle using Python to PostgreSQL.
• Collaborate with data architects to model data and define transformation logic.
• Implement efficient SQL queries, stored procedures, and functions in PostgreSQL.
• Optimize ETL processes for performance and scalability.
• Build data validation, automated tests, and data quality checks.
• Monitor ETL jobs and diagnose issues, applying fixes.
• Document ETL processes, data dictionaries, and runbooks.
• Participate in code reviews and mentor junior developers.

Skills

Python

PostgreSQL

SQL

ETL

Tools

IBM Datastage

Job description

Job Description

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 theETLprocess.
• Contribute to themigration from Oracle to PostgreSQL.
• Collaborate with cross-functional teams onapplication modernisationandcloud migrationefforts.
• Ensure code quality, performance, and maintainability throughout the development lifecycle.

Required Profile

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

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.

Offer

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