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December 17, 2025

Middle Data Engineer (#4296)

Mid • Remote

$5,000 - $5,800/

Kraków, Poland

#4296

Position Overview:  

As a Middle Data Engineer, you will support the migration of legacy on-premises SQL Server data warehouse to a cloud-based Snowflake environment. The project involves integrating various data sources, refactoring ETL processes, and ensuring efficient, reliable data movement for analytics and reporting.

Responsibilities:

  • Build and modify data pipelines to migrate data from SQL Server and other databases (Azure SQL, Oracle, Aurora) to AWS S3 and Snowflake.

  • Refactor legacy ETL jobs (SSIS, Transact-SQL) for use in cloud environments.

  • Implement data transformations and staging using dbt and/or similar tools.

  • Optimize the performance and costs of cloud data processing and storage.

  • Work collaboratively with client’s and N-iX engineers, ensuring smooth handoff and documentation.

  • Participate in QA, testing, deployment, and post-migration validation.

Must-Have Technologies:

  • Experience with cloud data warehouse technologies, including Snowflake and AWS S3.

  • Solid SQL skills; experience migrating legacy environments to cloud platforms.

  • Familiarity with ETL frameworks and tools (preferably SSIS, dbt).

  • Proficiency in Python for data pipeline development and automation.

  • Strong documentation and communication skills; able to work in cross-functional teams.

Nice to have:

  • Prior experience in large-scale data migration projects.

  • Background working with varied database platforms (SQL Server, Oracle, PostgreSQL, MySQL).

  • Knowledge of reporting platforms such as Looker is a plus.

We offer:

  • Flexible working format - remote, office-based or flexible

  • A competitive salary and good compensation package

  • Personalized career growth

  • Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)

  • Active tech communities with regular knowledge sharing

  • Education reimbursement

  • Memorable anniversary presents

  • Corporate events and team buildings

  • Other location-specific benefits