Job Description

Technical Lead

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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.

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.

Technincal Lead:

Technical Leadership & Visibility

Provides end-to-end visibility across the platform's technical domains and facilitates collaboration among technical SMEs and consuming product teams. Evaluates technical feasibility and options, balancing platform capability needs against delivery effort. Identifies dependencies, technical risks, and mitigation options across shared services, and ensures technical health of platform assets and adherence to a technical debt budget.

Direction & Requirements

Works with the technical leadership and stakeholders to define technical requirements, shape the platform roadmap, and drive value through reliable, reusable capabilities. Sets and continuously improves technical standards and delivery patterns for the crew. Ensures platform decisions are made with a product mindset - understanding the needs of internal product teams as customers and their end users as the ultimate beneficiary.

Delivery & Engineering Excellence

Owns delivery outcomes for the squad - driving predictability through estimation, iteration and proactive dependency management. Provides leadership to engineers on principles and practices, ensuring consistency in approach and building quality in by default. Leads by example, aligning the squad's execution with the platform vision and measuring success through tangible, demonstrable impact.

Crew and Squad Mission

The Identity & Public Platform squad owns Domain's AuthN and AuthZ services, as well as the Domain Developer Portal and Public API gateway. We are responsible for ensuring secure, reliable access to Domain's products for both internal and external consumers, managing everything from OAuth client lifecycles and fine-grained permissions to self-service API onboarding and documentation for external developers. As we evolve the Domain technology landscape, our squad plays a pivotal role in the integration with CoStar Group’s global platform. We focus on maintaining the critical-path services that underpin every authenticated interaction at Domain while evolving our architecture to support the global integration and needs of our expanding ecosystem.

The Identity squad is part of Product Platforms Crew - the connective tissue that enables Domain's product teams to focus on what makes them unique. We evolve shared capabilities enabling Domain to move faster with reliable foundations. We are a tech-led crew with a product mindset: our customers are Domain's internal product squads, and our success is measured by their velocity and the reliability of the services we provide. We operate with ruthless focus, co-create with stakeholders, and earn trust through consistent delivery and measurable impact

Responsibilities:

• Collaborate with stakeholders on team roadmap and priorities
• Execute and deliver on the roadmap
• Direct line management for all the engineers in the squad.
• Drive work and epic breakdown for effective estimation, capacity planning and delivery
• Manage and unblock technical dependencies with other teams where required
• Champion and adopt Engineering best practices
• Accountable to the System Health and Tech debt backlog for owned services
• Improve engineering efficiency for your team
• Accountable to reporting on delivery metrics for your team
• Mentor and coach software engineers in progressive engineering practices
• Participate in and contribute to cross domain technology forums and guilds
• Collaborate with Principal Engineers and Technology Leaders to drive Solution Design for large initiatives
• Be an ambassador for the Engineering brand internally and externally
• Elevate and escalate to tech leaders where large investment in tech debt and tech initiatives is required
• Build a deep understanding of their product and business domain
• Hands-on where necessary with a focus on initiatives that will help 10x the team
• Performs code reviews where necessary
• Facilitate team ceremonies where necessary

Experience:

• Bachelor’s Degree in a relevant technical specialisation
• Experience leading a team of engineers
• Experience designing software solutions for scale
• Experience with high-traffic, mission-critical public facing services
• Experience optimising engineering practices and processes
• Evidence of data informed decision making
• Experience working with one of the common Cloud Platforms such as AWS, Azure, and/or GCP
• Experience implementing DevOps practices and CI/CD
• Experience working in Agile environments
• Experience mentoring more junior engineers
• Deep expertise in at least one programming language and tech stack
• Understands shift-left testing and how to implement it in practice
• Familiar with Functional and Object Oriented programming
• Familiar with Document and Relational data persistence models
• Familiar with Cloud Design patterns
• Familiar with TDD, BDD and Domain Driven design
• Familiar with synchronous (API) and async (Messaging) integration patterns
• Familiar with modern Application Security Practices (OWASP)

Squad specific experience:

• C# / .NET 8 and ASP.NET Core for distributed, mission-critical backend services
• Strong understanding of OAuth2, OpenID Connect, and token lifecycle management (PKCE, federation, refresh tokens, assertion grants)
• Experience with identity platforms: multi-tenant authentication, social login federation, and fine-grained authorization
• Familiar with relational data persistence (PostgreSQL, MySQL/Aurora) and NoSQL (DynamoDB, Redis)

Highly regarded additional experience:

• Product/application development experience
• Experience or familiarity with Duende IdentityServer
• Experience migrating or integrating between identity providers
• Experience with asynchronous (SNS/SQS, EventBridge) integration patterns
• Experience with API gateway platforms — external developer onboarding, usage metering, and credential management
• Experience with fine-grained authorization systems (AuthZed/SpiceDB, OpenFGA, or similar)
• TypeScript / Node.js for AWS Lambda and infrastructure-as-code (CDK)
• React / Next.js or other modern web frontend frameworks
• AWS (or other Cloud Platform) Certification

What's Next?

We'll give your application the thoughtful attention it deserves and get back to you as soon as possible. If there's a match, one of our recruitment consultants will reach out-so keep your phone handy! We're genuinely excited about the chance to work together and make a meaningful impact.

Equity, Diversity and Inclusion at Domain

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 edi@domain.com.au or leave a message on 1300 858 356 and we will get back to you.

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