Senior Software Engineer (Website)

Job Description

The Senior Engineer drives high-quality software development and innovation, serving as a key driver of technical direction within Domain’s Residential Consumer web teams. This pivotal role involves architecting scalable, highly performant user interfaces and supporting back-end systems, writing and reviewing code, and ensuring all technical solutions align with the broader Domain Strategy.

Leveraging deep expertise across front and backend technology stacks the engineer will lead the development of complex features and champion frontend quality standards to solve real customer problems and enhance our website.

The Senior Engineer plays a crucial role in mentoring and guiding more junior team members, fostering a culture of continuous improvement and engineering excellence.

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 clear, concise, tested, and easily understood by others.
• Quick and effective in identifying and resolving issues, balancing trade-offs between speed, quality, and technical debt.
• 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.
• 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.
• Mentors and guides junior team members, fostering a culture of continuous improvement and engineering excellence.

Essential:

• Degree in Computer Science / Software Engineering or related field
• Strong experience in ReactJS (or similar frameworks), JavaScript, TypeScript, and Next.js
• Strong experience with C# .NET 
• Strong understanding of modern web development practices, building and consuming APIs (REST/GraphQL), developing Single Page Applications (SPA), Service Side Rendering
• Hands-on experience leveraging AI coding assistants to improve engineering productivity and code quality.
• Experience designing software solutions built for high scale and high traffic websites.
• DevOps practices, CI/CD, and infrastructure-as-code
• Strong practical experience with cloud services technologies such as containerised deployment, DynamoDB, ElasticSearch/OpenSearch
• Familiarity with containerization technologies like Docker. Experience working effectively within Agile environments.

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
• AWS (or other Cloud Platform) Certification

What’s In It For You?

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 [email protected] or leave a message on 1300 858 356 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