Sydney (AU) - Pitt St

Full time

R40019

Software Engineer - Trade Platform

Job Description

Build solutions that power a leading property marketplace

We're looking for a Software Engineer to join our Trade Platform Team , where you'll help develop and support the systems that power customer subscriptions, billing, product entitlements, and agency integrations across Domain.

Working primarily with C# and .NET , you'll contribute to business-critical platforms that manage customer billing and usage charges, subscription tiers, premium listing experiences, and agency booking services. Your work will directly impact how customers interact with our products and how listings are promoted across the platform.

What You'll Do

- Develop, enhance, and maintain software solutions using C# and .NET.

- Support systems responsible for customer billing, usage charging, and subscription management.

- Build functionality that enables premium product features, including listing prioritisation, promotional placements, and customer entitlements.

- Maintain and improve agency booking APIs and integrations.

- Design, develop and support scalable applications from concept through to production.

- Collaborate with Product, Engineering and business stakeholders to deliver customer value.

- Troubleshoot, diagnose and resolve production issues across critical systems.

- Contribute to code quality, testing, security and engineering best practices.

- Participate in a shared on-call roster supporting business-critical applications.

- Continuously improve platform performance, reliability and scalability.

Ideally You'll Have

- Commercial experience developing applications with C# and .NET.

- Experience building and consuming RESTful APIs and integrations.

- Strong understanding of software engineering fundamentals and design principles.

- Experience working with SQL databases and distributed systems.

- Knowledge of cloud platforms such as AWS, Azure or GCP.

- Experience delivering solutions that are scalable, reliable and maintainable.

- A collaborative mindset and ability to work effectively within Agile teams.

- Strong problem-solving and troubleshooting skills.

- A passion for continuous learning and improving engineering practices.

Why Join Us?

- Work on platforms that directly impact customers and revenue.





- Be part of a team-oriented team with experienced engineers who enjoy sharing knowledge.

- Tackle complex technical challenges at scale.

- Contribute to products used by thousands of customers every day.

- Enjoy opportunities to learn, grow and develop your technical expertise.

What’s in it for you

Working at CoStar Group means you'll enjoy a culture of collaboration and innovation that attracts the best and brightest across a broad range of disciplines. We offer you generous compensation and performance-based incentives. As well as having an outstanding working setting, other perks include extra days of annual leave, leadership development programs, LinkedIn Learning, Perkbox discounts and much more!

At CoStar, we recognise the positive value of diversity and promote equality. We aim at all times to recruit the person who is most suited to the job and welcome applications from people of all backgrounds including but not limited to; people of all genders, of all ages, sexual orientations, ethnicities, nationalities, religions and beliefs.

About Domain (part of the CoStar Group)

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 - a global leader in commercial real estate information, analytics, online marketplaces and 3D digital twin technology. We are dedicated to digitising the world’s real estate, empowering all people to discover properties, insights, and connections that improve their businesses and lives.

Equity, Diversity & Inclusion

Domain is enthusiastically and unapologetically committed to fostering an equitable, inclusive work culture which reflects our customers and communities. We are proactively looking for candidates from all lived experiences, including people with disability, and people of all ages, ethnicities, cultures (including Aboriginal and Torres Strait Islander Peoples), faiths,



sexual orientations, and gender identities (including trans and non-binary people).

We are committed to providing an equitable recruitment process for people with disability. If you require adjustments during the process we’re here to support. If you wish to receive this job advertisement in an accessible format, or have a confidential chat about workplace adjustments, please contact our Equity, Diversity and Inclusion team at or leave a message on and we will get back to you.

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

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.

We have been living and breathing the world of real estate information and online marketplaces for over 37 years, giving us the perspective to create truly unique and valuable products and services. We’ll continually refined, transformed and perfected our approach to our business, creating a language that has become standard in our industry and for our customers. 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.

CoStar Group is committed to creating a diverse environment and is proud to be an equal opportunity workplace and affirmative action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. CoStar Group is also committed to compliance with all fair employment practices regarding citizenship and immigration status.

If you are a qualified individual with a disability or a disabled veteran, you may request a reasonable accommodation if you are unable or limited in your ability to use or access as a result of your disability. You can request reasonable accommodations by sending an email to .

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📌 Software Engineer - Trade Platform (Sydney)
🏢 CoStar Realty Information
📍 Sydney