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CoStar Group

Commercial real estate data, analytics, marketplaces

Senior Software Engineer - Audience Amplification

Backend EngineeringConfirmed live in the last 24 hours
Full-timeSydney NSW, AustraliaNo salary listedIn-person

About the Job

Requirements

  • Deep expertise in C# and .NET and ASP.NET Core.
  • Understand shift-left testing and how to implement it in practice.
  • Be familiar with functional and object-oriented programming.
  • Be familiar with cloud design patterns, test-driven development, behavior-driven development, and domain-driven design.
  • Be familiar with modern application security practices, including OWASP.
  • Have a degree in Computer Science, Software Engineering, or a related field.

Responsibilities

  • Manage the entire lifecycle of projects, including engineering design, development, testing, production, deployment, fixes, and improvements.
  • Write, co-write, and review clear, concise, tested, production-ready code and documentation that others can easily understand.
  • Identify and resolve issues effectively, balancing speed, quality, and technical debt.
  • Apply a security lens to work and actively look for security vulnerabilities in code and during code reviews.
  • Understand system-wide impact and align with and contribute to Domain-wide architecture, security, and technology standards.
  • Design scalable solutions with future needs in mind.
  • Optimize for performance, maintainability, and security, and actively look for security vulnerabilities in code and code reviews.
  • Contribute to the system health and technical debt backlog for the owned service.
  • Collaborate with Lead Engineers and Tech Leads to improve processes and system change.
  • Find solutions to unsolved, loosely defined, highly technical problems.
  • Mentor and guide junior team members, fostering continuous improvement and engineering excellence.
  • Encourage collaboration and team alignment to help the squad develop high-quality solutions.
  • Build a deep understanding of the product and business domain.
  • Collaborate with Product Owners to align solutions with business and customer needs.

Desired Qualifications

  • Experience with .NET, 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 such as PostgreSQL and MySQL/Aurora, and NoSQL stores such as DynamoDB and Redis.
  • Experience with DevOps practices, continuous integration and continuous delivery, and infrastructure as code.
  • Experience designing software solutions for scale.
  • Experience mentoring more junior engineers.
  • Experience working in cross-functional Product, Design, and Tech teams.
  • Experience integrating with third-party platforms, partner APIs, or external services.
  • Experience with observability and production support.
  • Experience with product analytics, reporting, or campaign performance data.

About the Company

CoStar Group

Commercial real estate data, analytics, marketplaces

CoStar Group provides information, analytics, and online marketplaces for the commercial real estate industry. Its core products are detailed property data, market analyses, and tools to compare and evaluate properties, delivered via subscription access. It also runs online marketplaces like Apartments.com and LoopNet that connect renters with apartments and buyers/tenants with commercial properties, earning revenue from subscriptions, advertising, and transaction fees. The company differentiates itself through a large, integrated data platform and a suite of marketplaces that cover both residential rentals and commercial properties, with a strong presence in the U.S. and expanding globally. Its goal is to help brokers, property owners, investors, and lenders make informed real estate decisions and efficiently connect buyers, renters, and property listings across markets.

Company size
5,001-10,000
Company stage
IPO
Headquarters
Washington DC, District of Columbia
Founded
1987

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