LoopNet Software Engineer II

Job Description

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 CoStar Group is on a mission to digitize the worlds 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. Weve 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.

LoopNet the most popular place to find a space is the #1 global commercial real estate more than 12 million global unique monthly visitors LoopNet provides brokers buyers and sellers with what they need to meet and make deals. LoopNet has established itself as the most effective and far-reaching digital marketplace for commercial real estate owners and brokers. We are not done yet! We continue to focus on driving expansion by increasing market share in the US and abroad continuously innovating and enhancing the product and growing a powerhouse global team to reach our goals. Learn more about LoopNet.

We are seeking a highly skilled Senior Software Engineer with deep expertise in C#/.NET AWS cloud development and hands-on experience with AI coding tools such as Claude Code or GitHub this role you will contribute to building scalable high-quality systems across multiple products and brandsincluding leveraging modern AI-driven development practices to accelerate delivery and improve code quality. You will also play a key role in architecture decisions and mentoring engineers across the team.

This position is located in Irvine CA and offers 4 days a week onsite with 1 day work from home.

BASIC QUALIFICATIONS:

• Bachelors degree from an accredited not-for-profit university or college.

• A demonstrated track record of commitment with prior employers.

• 4 years of production development experience with C# Core.

• Proven history of building and launching successful products and platforms.

• Experience delivering products that meet specifications and performance SLAs.

• Solid experience writing unit performance and automated end-to-end tests

• Strong experience building APIs and backend systems with a solid grasp of software design principles.

• Deep understanding of the business context for which you are building software.

• Active participation in mentoring developers and building team consensus.

PREFERRED QUALIFICATIONS:

• Working knowledge of or React in TypeScript.

• Experience with relational database design (MS SQL or MySQL) including performance tuning.

• Hands-on experience with AWS services including S3 SQS DynamoDB and ElastiCache as well as Apache Kafka and Datadog.

• Experience with microservices distributed systems Docker and Kubernetes.

• Familiarity with CI/CD pipelines DevOps practices and Infrastructure as Code tools.

• Application security knowledge and experience with Git-based workflows.

• Hands-on professional experience with AI coding tools such as Claude Code GitHub Copilot or equivalent.

• Experience with cloud data warehouse platforms (BigQuery Databricks or Snowflake) and proficiency in Python for data engineering or analytics workflows.

Whats in it for You:

When you join CoStar Group youll experience a collaborative and innovative culture working alongside the best and brightest to empower our people and customers to succeed.

We offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training and tuition reimbursement.

Our benefits package includes (but is not limited to):

• Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug

• Life legal and supplementary insurance

• Virtual and in person mental health counseling services for individuals and family

• Commuter and parking benefits

• 401(K) retirement plan with matching contributions

• Employee stock purchase plan

• Paid time off

• Tuition reimbursement

• On-site fitness center and/or reimbursed fitness center membership costs (location dependent) with yoga studio Pelotons personal training group exercise classes

• Access to CoStar Groups Employee Resource Groups

• Complimentary gourmet coffee tea hot chocolate fresh fruit and other healthy snacks

The final salary or hourly rate offered for this role will fall within the range set forth below based on avariety of factors including but not limited to geographic location skills and competencies.

Base Compensation: $118000-$154000 Annually

We welcome all qualified candidates who are currently eligible to work full-time in the United States to apply. However please note that CoStar Group is not able to provide visa sponsorship for this position.

#LoopNet

#LI-PM3

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