Data Quality Officer

Data Quality Officer

**Job Description**:
Company Overview:
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 and the NASDAQ 100, 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.

We have been living and breathing the world of real estate information and online marketplaces for over 35 years, giving us the perspective to create truly unique and valuable offerings to our customers. We’ve continually refined, transformed, and perfected our approach to our business, creating a language that has become standard in our industry, for our customers, and even our competitors. We continue that effort today and are always working to improve and drive innovation. This is how we deliver for our customers, our employees, and investors. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate.

About Domain:
Domain is a leading property technology and services marketplace that is home to one of the largest portfolios of property brands in Australia, including the Domain, Allhomes and Commercial Real Estate (CRE) platforms. In 2025, Domain became part of CoStar Group (NASDAQ: CSGP), a global leader in commercial real estate information, analytics, online marketplaces and 3D digital twin technology. Together, Domain and CoStar Group is dedicated to digitising the world’s real estate, empowering all people to discover properties, insights, and connections that improve their businesses and lives.

About the Role:
As a Data Quality Officer, you’ll be the guardian of our data integrity. Your focus will be on manual data labeling, validation, and remediation to ensure AI models and business teams can rely on clean, accurate data. By catching errors, preventing bias, and improving data consistency, you’ll directly contribute to the success of our AI initiatives and the broader business strategy.

Key Responsibilities/Success Measures- Ensure high-quality, reliable data that business stakeholders can trust.- Improve the accuracy and performance of AI models through meticulous data validation and labeling.- Reduce business risk by identifying and correcting data errors, preventing biased outcomes.- Streamline operational efficiency by reducing time teams spend cleaning or correcting data.- Document findings clearly and follow complex guidelines to maintain data standards.- Support ongoing AI/ML evaluation by providing validated, structured data inputs.

Our Ideal Person:
Essential:
- Exceptional attention to detail and analytical skills.- Ability to follow complex guidelines and document findings clearly.- Strong written and verbal communication skills.- Proficiency with office productivity tools, including Microsoft Excel or Google Sheets.- Proven hands-on experience in data validation, data labeling, or data entry.- Bachelor's Degree or equivalent from an accredited university or college

Nice to Haves:
- Experience in real estate or property technology.- Familiarity with data visualisation tools (e.g., Tableau, Power BI).- Experience in AI/ML or LLMs validation, particularly for information extraction tasks.- Ability to identify potential data quality issues at scale and think critically about solutions.

Why join us?

We're the kind of place you can make a real impact, with a workplace culture where you can be you. It's a fun, safe space where you'll always feel you belong. Perks of the role include:
- Our much-loved approach to flexible hybrid working;- Mentoring and leadership programs, with access to Learning & Development tools;- First rate parental leave and support for working parents;- Regular social events including our famous Innovation Days

We don't just talk, we do. Every day we solve property problems for Australians and beyond. We encourage our people to see the possibilities, and turn them into realities.

What's next?

Equity, Diversity and Inclusion at Domain

CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing