Senior Data Quality Engineer - Champion Trusted Data

CoStar; Toronto; On-site; CAD 120,000 - 150,000; Full time

Benefits offered by this job

Healthcare coverage

401(k) retirement plan with matching

Stock purchase plan

Paid time off

Job summary

CoStar Group is seeking a Senior Data Quality Engineer in Toronto to design and run end-to-end data quality testing for our enterprise data platform. You will build automated checks, manage test data, and ensure accuracy and completeness across pipelines using Snowflake, dbt, Airflow, and AWS Glue.

You will collaborate with Product, Research, and Data Engineers to translate business definitions into test scenarios, establish regression coverage, and drive quality through CI/CD integrations.

Qualifications

• 6+ years of experience in Data Quality Engineering or related field.
• Hands-on testing of production data systems and end-to-end data pipelines.
• Advanced SQL for data analysis, reconciliation, and validation.
• Strong scripting or automation skills, preferably Python.
• Experience designing automated data-testing frameworks.
• Knowledge of Snowflake, dbt, Airflow, AWS Glue or equivalent.
• Ability to translate domain requirements into measurable test scenarios.
• Experience with large datasets and regression testing.
• Understanding of data quality dimensions: accuracy, completeness, consistency, and freshness.

Responsibilities

• Design and execute ETL/ELT testing strategies for pipelines and data products.
• Perform end-to-end data validation from source to output.
• Create curated test datasets and baseline results.
• Develop reusable automated validation frameworks and CI/CD integrations.
• Monitor data quality with dashboards and alerts; investigate failures.
• Collaborate with product and data teams to ensure business alignment.

Skills

SQL

Python

ETL testing

Data quality

Regression testing

Data reconciliation

Airflow

dbt

Snowflake

AWS Glue

CI/CD integration

Test automation

Tools

Snowflake

dbt

Apache Airflow

AWS Glue

S3

Grafana

Job description

CoStar Group is seeking a Senior Data Quality Engineer in Toronto to design and run end-to-end data quality testing for our enterprise data platform. You will build automated checks, manage test data, and ensure accuracy and completeness across pipelines using Snowflake, dbt, Airflow, and AWS Glue.

You will collaborate with Product, Research, and Data Engineers to translate business definitions into test scenarios, establish regression coverage, and drive quality through CI/CD integrations.