Junior Data Engineer

VELUX

. Monitor data pipelines, investigate failed runs and failing tests, and correct defects .

Posted 11/6/2026full-timeWarsaw • PolandJuniorWebsite

Core Competencies

Role fit

Core Competencies

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Proficient in SQL and Python for data manipulation and analysis, with hands-on experience in building and maintaining data pipelines using tools like Prefect and Snowflake. Strong ability to investigate data issues, implement fixes, and ensure data reliability in a collaborative environment.

Highest-signal resume keywords

SQLPythonSnowflakePrefectDbt

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Hard Skills

Data Pipeline MonitoringData Model TestingRoot Cause AnalysisData BackfillingData Reprocessing

Soft Skills

CollaborationDocumentationCode Review

Tools & Technologies

GitAI-Powered Coding Environments

Industry Keywords

Data TransformationCloud Data WarehouseData Orchestration

Tech Stack

Tools & technologies

CloudPythonSnowflakeSQL

About the role

Key responsibilities & impact

Monitor data pipelines, investigate failed runs and failing tests, and correct defects
Run backfills and reprocessing when source data arrives late or changes
Find and remove root causes of repeat failures
Build new source connections in Prefect, including databases, APIs and external data providers
Build staging models in Snowflake with dbt on connected sources
Add tests, documentation and freshness checks to data models
Review colleagues’ pull requests and documentation
Take ownership of a workstream in the 2027 roadmap with support from a senior colleague
Help ensure data pipelines run reliably and bring new data sources into the platform
Investigate issues, identify root causes and implement fixes

Requirements

What you’ll need

Good working knowledge of SQL and Python
Hands-on experience working with real-world data in a professional environment, through an internship, a first job or a project involving real production data
Full professional proficiency in English, both spoken and written
Some experience with a cloud data warehouse, such as Snowflake or an equivalent platform, would be an advantage
Familiarity with dbt or another data transformation tool would be an advantage
Some experience with a data orchestration tool, such as Prefect, would be an advantage
Experience working with Git, pull requests and code reviews in a team environment would be an advantage
Familiarity with AI-powered coding environments, such as Claude Code or Codex, would be an advantage

Benefits

Comp & perks

Annual bonus
Employee Pension Scheme, paid in full by the employer
Well-being package: Multisport card or holiday subsidy, life insurance, lunch card and gift cards
Private medical care, with telemedicine and rehabilitation
Support from the Employee Foundation
Hybrid work 3 days in the office
Flexible working hours
Modern office with daylight, fresh air and high-quality equipment
Parking spaces for employees
Massages in the office
Referral programme
Employee discount on VELUX products