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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on a global e-commerce platform, aiming at harmonizing and standardizing financial data and migrating from legacy systems. Key technologies include Google BigQuery, GCP, Apache Airflow, SQL, GitHub, Jenkins, and OpenMetadata. Responsibilities cover developing and maintaining scalable ETL/ELT pipelines, integrating data from multiple sources, optimizing data models, ensuring data quality, and overseeing migration and orchestration processes.
Senior Data Engineer | Data Harmonization & BigQuery
Company: SQUARE ONE RESOURCES sp. z o.o.
from: 12 August 2026
to: 11 September 2026
150 - 180 złnet (+ VAT)/ hr.B2B contract (full-time)
Offer parameters
level:mid • senior
working mode:remote
location:Warszawa, Masovian
Warszawa, Masovian
Requirements
Expected technologies
Google BigQuery
Apache Airflow
PostgreSQL
SQL
ETL/ELT
Google Cloud Platform
Our requirements
- Cloud & DWH: Google BigQuery, GCP
- Orchestration: Apache Airflow (Cloud Composer)
- Databases: BigQuery, AlloyDB / PostgreSQL, Teradata (legacy)
- Data Integration: SQL-based ELT, SFTP, APIs (NetSuite, PSPs)
- Governance: OpenMetadata (lineage, catalog), IAM/RBAC
- CI/CD & DevOps: GitHub, Jenkins, Flyway, Terraform
- Data Quality: Metadata-driven DQ framework (BigQuery + Airflow)
Your responsibilities
- Develop and maintain scalable ETL/ELT data pipelines (Bronze → Silver → Gold) using SQL and BigQuery.
- Ingest and integrate data from multiple sources, including SFTP, APIs, and databases.
- Build and optimize data models, fact and dimension tables, including SCD and surrogate key logic.
- Develop and support Airflow DAGs for orchestration, scheduling, and monitoring.
- Implement data quality checks, reconciliation, validation, and idempotent processing.
- Optimize BigQuery performance and costs through partitioning, clustering, and query tuning.
- Support CI/CD, schema evolution, data lineage, and documentation using Git, Jenkins, Flyway, and OpenMetadata.
- Troubleshoot pipeline issues and support data migration from legacy systems and integration with downstream systems.
About the project
Join an international project for a global e-commerce and marketplace platform operating across multiple markets, including North America and other international regions.
The project focuses on harmonizing and standardizing financial and operational data coming from different regional systems and data models. The goal is to build a consistent, scalable, and high-quality data environment that will improve reporting, financial processes, and migration from legacy systems.
💼 Project Details
Work model: 100% remote
Workload: Full-time
Equipment: Own equipment
Start date: ASAP
Recruitment process: 2 technical interviews
🎯 Project Scope
As a Senior Data Engineer, you will be responsible for developing scalable data pipelines, data modeling and transformation in BigQuery, integrating data from multiple sources, and ensuring data quality and consistency.
A key part of the project will also involve process optimization, data migration from legacy systems, reconciliation, data lineage, and ensuring reliable and auditable data processing workflows.
This is how we organize our work
This is how we work
at the client's site
This is how we work on a project
- Continuous Deployment
- Continuous Integration
- DevOps
What we offer
- 100% remote work
- Medicover
- Medicover Sport
- International project
- Modern technologies and scalable data solutions
- Opportunity to grow in the Data Engineering area
- Collaboration with an experienced international team
- English-speaking environment
- Opportunity to work on a project for a global e-commerce platform
Benefits
- sharing the costs of sports activities
- private medical care
Recruitment stages
- 1.Interview with Recruiter
- 2.1st technical interview
- 3.2nd technical interview
- 4.Decision
SQUARE ONE RESOURCES sp. z o.o.
At Square One Poland we link IT experts with the business. With over 25 years of experience, we specialize in recruitment processes on a global scale. Despite years of experience, we still have a startup DNA and this is our advantage. Our offices are located in London and Warsaw, however, we can reach clients from all over the world, from start-ups to big worldwide corporations.
This is how we work
Senior Data Engineer | Data Harmonization & BigQuery
150–180 zł / hr. (B2B)
I apply to:
SQUARE ONE RESOURCES sp. z o.o.
Warszawa, Masovian
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