Python Data Engineer

Quick Facts

• Role: Python Data Engineer (Python Engineer / Data Engineering)

• Experience level: Mid-Senior / Senior

• Location: Warsaw, Poland (hybrid)

• Start: ASAP

Description

Join an international, technically demanding project in financial technology. Develop and maintain backend and data-intensive solutions using Python and PostgreSQL to process large datasets and power performance-critical applications.

Responsibilities

• Develop and maintain backend applications and services using Python

• Design, implement, and optimize solutions based on PostgreSQL

• Work with large datasets and complex database structures

• Develop and maintain data processing and transformation components

• Optimize application performance, database queries, and data processing workflows

• Support system integrations and data migration initiatives

• Troubleshoot, debug, and resolve technical issues across backend environments

• Collaborate with international engineering teams on technical requirements and solution design

• Maintain, refactor, and enhance existing applications and services

Requirements

• Mid-Senior / Senior commercial experience as a Python Developer / Python Engineer

• Strong hands-on experience with Python in production environments

• Very good knowledge of SQL and PostgreSQL, including complex queries and large databases

• Strong practical experience with Pandas and/or PySpark and/or Apache Spark for large datasets

• Proven experience with high-volume data and complex data structures

• Practical experience optimizing data processing, application performance, and database queries

• Experience with data migration, transformation, or large-scale data movement

• University degree in Computer Science, Software Engineering, or a relevant technical field

• Very good English for daily communication in an international environment

Benefits

• Hybrid work model in Warsaw, Poland

• Work on a large-scale, technically demanding financial technology project with an international engineering team