At a Glance
- Tasks: Ensure data quality through testing and validation in a dynamic real estate environment.
- Company: Join CoStar Group, a leader in real estate information and analytics.
- Benefits: Enjoy competitive salary, comprehensive healthcare, tuition reimbursement, and flexible work options.
- Other info: Collaborative culture with opportunities for professional growth and mentorship.
- Why this job: Make a real impact on the future of housing with innovative data solutions.
- Qualifications: 6+ years in Data Quality Engineering and strong SQL skills required.
The predicted salary is between 120000 - 150000 $ per year.
CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index, CoStar Group is on a mission to digitize the world’s real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives.
About Zonda: Zonda is redefining the future of housing. We are perfectly placed in the heart of the fast-growing real estate industry. We are making big bets on the future of real estate, trailblazing a 2030 vision for the industry.
We are looking for a Senior Data Quality Engineer to build and operate the testing and validation capabilities that ensure data delivered through our enterprise data platform is accurate, complete, consistent, and fit for business use. Our environment includes Snowflake, AWS Aurora/RDS, Amazon MWAA/Apache Airflow, dbt, AWS Glue, Amazon S3, DataHub, Grafana, and CloudWatch. This is a hands-on senior engineering role focused on end-to-end data pipeline testing, automated validation, regression testing, test-data management, and business-rule verification.
A major part of the role is partnering with Product, Research, Advisory, Economics, Data Engineering, and other business subject-matter experts to translate business definitions, methodologies, and expected outcomes into measurable and repeatable tests. Data Engineers remain responsible for testing the pipelines and transformations they build. The Senior Data Quality Engineer provides reusable testing frameworks, curated test data, broader regression coverage, and independent validation for critical or higher-risk changes.
Responsibilities:
- Design and execute testing strategies for ETL/ELT pipelines, transformations, integrations, and published data products.
- Validate data end to end, from source ingestion through transformation and final output.
- Perform source-to-target reconciliation to validate completeness, accuracy, mappings, calculations, aggregations, joins, filters, and business rules.
- Build regression coverage to detect unintended changes caused by pipeline, schema, transformation, or business-rule updates.
- Test large datasets using appropriate sampling, aggregate reconciliation, full-population comparisons, and targeted edge cases.
- Validate nulls, duplicates, referential integrity, incremental processing, historical behavior, distributions, and other material data conditions.
Basic Qualifications:
- 6+ years of experience in Data Quality Engineering, Data Testing, Quality Engineering, Data Engineering, or a related discipline.
- Strong hands-on experience with ETL/ELT and end-to-end data pipeline testing.
- Advanced SQL skills for data analysis, reconciliation, comparison, and validation.
- Strong scripting or test-automation skills, preferably Python.
- Experience validating data in modern cloud data platforms; Snowflake experience is preferred.
What's in it for you?
When you join CoStar Group, you’ll experience a collaborative and innovative culture working alongside the best and brightest to empower our people and customers to succeed. We offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training and tuition reimbursement.
Senior Data Quality Engineer – Toronto employer: CoStar Group, Inc.
CoStar Group is an exceptional employer that fosters a collaborative and innovative work culture in the heart of Toronto. With a strong focus on employee growth, we offer extensive training and development opportunities, ensuring our team members thrive in their careers while working on cutting-edge technologies like Snowflake and AWS. Join us to be part of a dynamic environment where your contributions directly impact the success of scalable data solutions.
