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Senior Software Engineer Audience Amplication

CoStar Group


Job Location:

Sydney - Australia

Monthly Salary: Not provided by the employer
Posted: 20 September 2026 (6 hours ago)
Application Deadline: 18 December 2026
Vacancies: 1 Vacancy

Job Summary

Senior Software Engineer - Audience Amplication


Job Description


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.

By leveraging advanced technical skills and a deep understanding of software engineering principles the Senior Engineer contributes to the creation of robust scalable and efficient applications that align with our strategic goals. This role involves writing and reviewing code as well as architecting solutions that meet both current and future business needs.

The Senior Engineer plays a crucial role in mentoring and guiding more junior team members fostering a culture of continuous improvement and engineering excellence. By leading by example and providing support this role helps build a strong cohesive squad team capable of tackling complex challenges and delivering high-quality software products. The Senior Engineer also collaborates closely within their cross-functional squad team working closely with the Product Owner to ensure that software solutions are aligned with customer value and business needs.

Squad Mission

The Audience Amplification Platform team sits within the Agent Division and is responsible for Domain Groups digital marketing innovation powering the next generation of property advertising beyond our owned platforms. The team builds and supports Domains social platform products enabling high-impact campaigns across Facebook Instagram Google and other leading digital channels. Our mission is to make every campaign smarter more transparent and more effective for our customers.

Responsibilities:

  • Responsible for the entire lifecycle of projects: engineering design development test production and deployment and subsequent fixes and improvements.

  • Consistently writes co-writes and reviews documentation and production-ready code that is clear 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.

Ideally you will have:

  • Experience React TypeScript or similar frontend technologies.

  • Experience with cloud platforms such as AWS Azure or GCP.

  • Experience with microservices and event-driven architectures

  • Experience with API and asynchronous integration patterns such as SNS/SQS and Kafka.

  • Experience with SQL data stores (PostgreSQL MySQL/Aurora) and NoSQL (DynamoDB Redis)

  • Experience with DevOps practices CI/CD and infrastructure-as-code

Technical Skills

  • Deep expertise in C# / .NET and Core.

  • Understands shift-left testing and how to implement it in practice

  • Familiar with Functional and Object Oriented programming

  • Familiar with Cloud Design patterns TDD BDD and Domain Driven design

  • Familiar with modern Application Security Practices (OWASP)

  • Degree in Computer Science / Software Engineering or related field

Whats in it for you

The opportunity to work for Domain now 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 worlds real estate empowering all people to discover properties insights and connections that improve their businesses and lives.

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 were 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 onand we will get back to you.

Whats Next
Well give your application the thoughtful attention it deserves and get back to you as soon as possible. If theres a match one of our recruitment consultants will reach outso keep your phone handy! Were genuinely excited about the chance to work together and make a meaningful impact.


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


Required Experience:

Senior IC


About Company

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The most recommended lease management platform for office and retail tenant portfolios of commercial real estate.

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