Senior Software Engineer

CoStar Group, Inc.; Richmond (VA); Hybrid; USD 130,000 - 170,000; Full time

Benefits offered by this job

Comprehensive healthcare coverage

Mental health counseling services

401(K) retirement plan with matching

Employee stock purchase plan

Paid time off

Job summary

CoStar Group, Inc. seeks a Senior Software Engineer in Richmond, VA to build customer-facing web apps using React and TypeScript, while advancing AI-powered features across our CRM platform. The role emphasizes robust code, scalable design, and collaboration with Sales and Data teams.

Eligible candidates will have 6+ years of software development, experience with RESTful APIs in C#, and familiarity with AI adoption. The team operates Mon–Thu in the office with Friday work-from-home option.

Qualifications

• Bachelor’s degree from an accredited college; 6+ years in software development.
• Experience architecting large scale distributed systems and web apps in agile environments.
• Experience building RESTful APIs using C#; familiarity with AI adoption and development; CI/CD basics.
• Proficient with Git and CI/CD deployment processes.
• Familiarity with AI technologies, LLMs, and agent-like architectures.

Responsibilities

• Build customer-facing web applications using React and TypeScript.
• Design and implement AI-powered software solutions across CoStar platforms.
• Integrate AI skills, agents, tools, and intelligent workflows into internal systems and customer-facing apps.
• Produce robust, maintainable code; enforce development standards and code reviews.
• Collaborate with Product, Sales, and Data teams to identify AI-driven value.

Skills

Object-oriented programming

AI technologies awareness

RESTful APIs

Distributed systems

SQL

CI/CD

AI concepts

LLMs familiarity

Education

Bachelor's degree

Tools

Git

Lambda

DynamoDB

SQS

Job description

Senior Software Engineer

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 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. Our team is responsible for building software in support of CoStar Group's sales teams. We think big, building innovative CRM features that empower our sales teams' success. We are a collaborative group with a mix of native mobile, data, API / platform, and front-end skills, and we are working to drive our company's future with our proprietary CRM system. We are hiring a Senior Software Engineer to join our Sales Development team and contribute to our AI initiatives within our CRM platform. CoStar is investing heavily in artificial intelligence to accelerate software delivery, improve platform observability, automate research and business workflows, enhance product experiences through intelligent agents and skills, and improve data quality across enterprise systems. Successful candidates will demonstrate a willingness to learn, adopt, and apply AI technologies responsibly to solve complex business and engineering challenges.

This position is located in Richmond, VA and offers a schedule of Monday to Thursday in office and the option to work from home on Friday.

Responsibilities

Building customer-facing web applications using React and TypeScript. Design and implement AI-powered software solutions that enhance the customer experience, improve platform intelligence, and unlock new product capabilities across CoStar brands. Build and integrate AI skills, agents, tools, and intelligent workflows into internal systems and customer-facing applications. Produce bullet-proof code that is robust, efficient, and maintainable; our primary tools are C#, .NET Framework, SQL Server, AWS. Utilize AI models to enhance monitoring, replayability, observability, and diagnostic capabilities to improve system reliability, accelerate problem resolution, and reduce operational risk. Implement telemetry-driven solutions that proactively identify anomalies, performance bottlenecks, and potential customer-impacting issues. Drive and lead software design, development standards, and code reviews. Build intelligent automation solutions that streamline research workflows, improve information discovery, and increase operational efficiency across business functions. Collaborate with Product, Sales, and Data teams to identify opportunities where AI-driven automation can create business value and improve decision-making. Continually evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strengthen CoStar’s technology platform and develop best practices. Develop comprehensive application testing procedures to ensure high-quality applications for tens of thousands of users.

Basic Qualifications

Basic Qualifications Bachelor’s Degree required from an accredited, not-for-profit, in-person college / university 6+ years of software development experience with OOP languages Demonstrated experience in architecting, designing and building large scale distributed, service-oriented systems and web applications in an agile environment Experience building RESTful APIs using C# Proficient understanding of code versioning tools such as Git. Understanding AI technologies and has hands-on experience in AI adoption and development. Familiarity with large language models (LLMs), prompt engineering, or agent-based architectures. Familiarity with CI/CD deployment processes A track record of commitment to prior employers

Preferred Qualifications and Skills

Strong communication skills (to both business and technical partners). SQL and database development knowledge. Familiarity with AWS PaaS services such as Lambda, DynamoDB, and SQS. Data modeling experience from conceptual, logical, and physical designs. Experience implementing AI agents, workflow automation platforms, or intelligent search solutions. Experience applying AI-assisted software development practices to improve engineering productivity and code quality.

What's in it for you?

When you join CoStar Group, you’ll 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.

Benefits

• 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)
• Access to CoStar Group’s Employee Resource Groups
• Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks

Base Compensation: $130,000 - $170,000 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. #LI-KW1

CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing 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 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 37 years, giving us the perspective to create truly unique and valuable products and services. We’ve continually refined, transformed and perfected our approach to our business, creating a language that has become standard in our industry and for our customers. 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. CoStar Group is committed to creating a diverse environment and is proud to be an equal opportunity workplace and affirmative action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. CoStar Group is also committed to compliance with all fair employment practices regarding citizenship and immigration status. If you are a qualified individual with a disability or a disabled veteran, you may request a reasonable accommodation if you are unable or limited in your ability to use or access www.costargroup.com/careers as a result of your disability. You can request reasonable accommodations by sending an email to [e-mail].