Senior Data Engineer @ N-iX

N-iX; Kraków; Hybrid; PLN 120,000 - 180,000; Full time

Job summary

A global technology company seeks a Senior Data Engineer in Kraków to support migrating a legacy SQL Server data warehouse to a cloud environment using Snowflake. Responsibilities include building data pipelines, refactoring ETL processes, and collaborating with cross-functional teams. Strong SQL and Python skills are essential, along with experience in cloud data technologies. Flexible working hours and remote options are available.

Benefits

Flexible working hours

Remote work possibility

English classes

Active tech community

Training budget

International team

Mentoring program

Compensation for certifications

Free coffee and kitchen

Modern office building

Qualifications

• 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.

Responsibilities

• Build and modify data pipelines to migrate data to AWS S3 and Snowflake.
• Refactor legacy ETL jobs for use in cloud environments.
• Implement data transformations and staging using dbt and/or similar tools.
• Optimize performance and costs of cloud data processing and storage.

Skills

Cloud data warehouse technologies

SQL skills

ETL frameworks and tools

Python

Documentation and communication skills

Tools

Snowflake

AWS S3

SSIS

dbt

Job description

Senior Data Engineer @ N-iX

Kraków, Lesser Poland Voivodeship, Polska

As a Senior/Middle Data Engineer, you will support the migration of a 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.

Benefits

• Flexible working hours and remote work possibility.
• English classes.
• Active tech community.
• Training budget.
• International team.
• Mentoring program.
• Compensation for certifications.
• Free coffee and kitchen.
• Modern office building.