Software Engineer II

Location: US-VA Richmond - CoStar Tower

Company Overview

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.

Position Overview

We are seeking a Software Engineer II who excels at designing and architecting modern web applications. This engineer would support our Web Enterprise team in building the software tools that power our proprietary CRM platform and support our sales, research and customer support teams across Homes.com, Costar.com, Apartments.com, LoopNet.com, and more.

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 is in office Monday through Thursday with work from home on Friday.

Responsibilities

• Design, develop, and maintain scalable full-stack applications, APIs, and cloud-native services that power critical customer and business workflows.
• Contribute to AI-powered products, intelligent agents, and automation capabilities that enhance user experiences, increase productivity, and unlock new platform capabilities.
• Work on modern AI solutions, including LLM-powered workflows, retrieval systems, and intelligent decision-making tools across customer-facing and internal applications.
• Collaborate with Product, Data Science, and Engineering teams to identify opportunities where AI and automation can drive measurable business impact and operational efficiency.
• Deliver secure, high-performance, and maintainable software through modern engineering practices, including automated testing, CI/CD, code reviews, and observability.
• Continuously evaluate emerging technologies, AI frameworks, and industry trends to strengthen CoStar's technology ecosystem and accelerate innovation.

Basic Qualifications

• Bachelor's degree from an accredited, not-for-profit, in-person university or college.
• 3+ years of experience designing, building, deploying, and supporting production-grade software applications.
• Experience developing full-stack applications with modern web technologies such as React, TypeScript, C#, .NET, SQL Server, AWS, or comparable technologies.
• Familiarity with building or integrating AI-powered applications, including AI agents, LLM-powered workflows, chatbots, copilots, or agent-based systems.
• Software engineering fundamentals across application architecture, testing, security, performance, and modern development practices.
• Experience collaborating across engineering, product, and business teams in an agile environment.
• Track record of commitment to prior employers.

Preferred Qualifications

• Experience building and deploying agentic AI solutions that reason, plan, make decisions, interact with tools, and automate complex business workflows.
• Experience with retrieval-augmented generation (RAG), prompt engineering, tool-calling frameworks, AI evaluation, or orchestration platforms.
• Experience developing distributed systems or cloud-native applications on AWS or a comparable cloud platform.
• Familiarity with Kafka, Redis, Elasticsearch, DynamoDB, S3, Lambda, or similar scalable data and messaging technologies.
• 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.

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 Group’s Employee Resource Groups
• Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks
• The final salary offered for this role will fall within the range below based on a variety of factors, including geographic location, skills, and competencies.
• Base compensation: $108,000–$140,000 annually
• We welcome all qualified candidates who are currently eligible to work full-time in the United States to apply. CoStar Group is not able to provide visa sponsorship for this position.

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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