The Senior Engineer is pivotal in supporting the delivery of our Domain Strategy by driving innovation and ensuring the development of high-quality software solutions. They are responsible for the entire lifecycle of medium-sized projects: engineering design, development, test, production, and deployment and subsequent fixes and improvements.

The Search Platform squad owns Domain's search and discovery layer to services that power how millions of users find property across residential and commercial markets every day. We are responsible for the high-performance, OpenSearch-backed APIs at the heart of the Domain experience, focusing on relevance, reliability, and scale under heavy production load. As Domain's technology landscape evolves, our squad plays a key role in shaping how discovery integrates with CoStar's global platform, while continuing to own the critical-path services behind every property search on Domain.

What you'll do

Responsible for the entire lifecycle of medium-sized projects: engineering design, development, test, production, and deployment and subsequent fixes and improvements.

Finds solutions to unsolved, loosely-defined, highly-technical problems.

Consistently writes, co-writes, and reviews documentation and production-ready code that is transparent, concise, tested, and easily understood by others.

Proficient in multiple languages, frameworks, and tools.

Quick and effective in identifying and resolving issues, balancing trade-offs between speed, quality, and technical debt.

Approaches work with a security lens and actively looks for security vulnerabilities both in code and when providing code reviews.

Understands the big picture and system-wide impact, aligning with and contributes to domain wide architecture, security and technology standards





Designs solutions with scalability and future needs in mind.

Collaborates with Product Owners to ensure that solutions are aligned with business and customer needs.

Optimises for performance, maintainability, and security, actively looks for security vulnerabilities both in code and when providing code reviews.

Contribute to the System Health and Tech debt backlog for their respective owned service.

Collaborate with Lead Engineers and Tech Leads on improving process and system change.

Degree in Computer Science / Software Engineering or related field

Strong experience in C# / .NET, Elastic Search or Open Search for distributed backend services

Experience designing software solutions for scale

Experience with high traffic customer-facing services

Experience working with one of the common Cloud Platforms such as AWS, Azure or GCP

DevOps practices, CI/CD, and infrastructure-as-code

Familiar with Cloud Design patterns

Familiar with modern Application Security Practices (OWASP)

Understanding of shift-left testing and how to implement it in practice

Experience with micro services and event-driven architectures

Experience working with Tech leads to optimize engineering practices and processes

Experience mentoring more junior engineers

Experience working in cross-functional teams (Product, Design and Tech)

Nice to have

Hands on experience with AWS (ECS/EKS, Bedrock, IAM, networking)





Experience with AI-assisted engineering workflows

Experience building production AI/LLM systems

TypeScript / Node.js for AWS Lambda and infrastructure-as-code (CDK)

AWS (or other Cloud Platform) Certification

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, All homes and Commercial Real Estate (CRE) platforms. In 2025, Domain became part of CoStar Group to 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 and 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 adjustmentsand we will get back to you.

Posted:

Salary:Attractive package will be offered to right candidate

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📌 Senior Software Engineer (City of Sydney)
🏢 Domain Group
📍 City of Sydney