Python Data Engineer

Link Group is engaged in the financial technology sector, working on a large-scale, technically demanding project involving backend and data-intensive solutions.

• Mid-Senior or Senior level experience as a Python Developer/Engineer.
• Strong hands-on experience with Python in production.
• Very good knowledge of SQL and PostgreSQL, including complex queries and large databases.
• Practical experience with pandas, PySpark, and/or Apache Spark for large datasets.
• Proven experience with high-volume data and complex data structures.
• 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 related field.
• Very good English for daily communication within an international environment.

Nice to have:

• Knowledge of FastAPI, Flask, or Django.
• Experience with Docker and Kubernetes.
• Familiarity with Apache Kafka or other messaging technologies.
• Knowledge of Apache Airflow or similar workflow orchestration tools.
• Exposure to AWS, Azure, or GCP.
• Experience with CI/CD pipelines.
• Experience in financial services, asset management, or investment funds, especially ETFs.

• 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.

Location: Warsaw, Poland – hybrid model.