Senior Data Engineer: Snowflake & Modern Data Stack

Link Group; Kraków; On-site; PLN 120,000 - 180,000; Full time

Job summary

Link Group is seeking an experienced Test Automation Engineer / Automation Quality Engineer to modernise and optimize the test automation landscape. You will reduce test execution time, raise release confidence, and enhance GUI regression coverage while migrating test pipelines to GitHub Actions.

The role is hands-on, collaborating with backend/platform teams and leveraging AI tools to identify gaps, troubleshoot issues, and speed up engineering work.

Qualifications

• Hands-on experience with Snowflake data modelling, performance tuning, cost optimisation, and security/governance.
• Proven experience building production-grade ELT/ETL pipelines using dbt, Apache Airflow, Azure Data Factory, or similar.
• Expert-level SQL skills.
• Proficiency in Python for automation and data processing.
• Experience using AI-assisted development tools to improve speed, quality, and documentation.
• Strong data quality mindset with testing, monitoring, alerting, observability.
• Ability to own initiatives from unclear requirements to reliable data products.
• Strong communication skills to explain data topics to business stakeholders.

Responsibilities

• Build and maintain reliable ELT/ETL pipelines that move data from transactional systems, microservices, event streams, and external sources into Snowflake.
• Design clean, performant, and scalable data models for reporting, analytics, and customer-facing insights.
• Contribute to the architecture of the end-to-end data platform, from ingestion and transformation to serving and analytics.
• Apply modern data modelling practices, with a focus on modular, tested, and well-documented models.
• Use AI development tools such as Claude and Cursor to accelerate pipeline development, query optimisation, documentation, and quality improvements.
• Implement data quality checks, automated testing, monitoring, and observability into data pipelines from the start.
• Support code reviews, documentation, and knowledge sharing around Snowflake, data modelling, performance optimisation, and data platform best practices.
• Work closely with Software Engineers, Product Managers, Finance stakeholders, and analytics teams to translate data needs into reliable data products.

Skills

SQL

Python

Communication skills

Stakeholder management

Finance domain knowledge

Tools

Snowflake

ELT/ETL

dbt

Apache Airflow

Azure Data Factory

Power BI

DAX

Semantic models

Power Query

Microsoft Fabric

Azure

AWS

Azure Synapse

Azure Data Lake

AWS Glue

S3

Kafka

Azure Event Hub

Job description

Link Group is seeking an experienced Test Automation Engineer / Automation Quality Engineer to modernise and optimize the test automation landscape. You will reduce test execution time, raise release confidence, and enhance GUI regression coverage while migrating test pipelines to GitHub Actions.

The role is hands-on, collaborating with backend/platform teams and leveraging AI tools to identify gaps, troubleshoot issues, and speed up engineering work.