Job Description

Associate Software Engineer - Arlington, VA

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Job Description

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Associate Software Engineer – Arlington

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.

Learn more about CoStar.  

Role Description:

We’re looking for an Associate Software Engineer with a passion for designing and building modern web applications. This role develops tools that power CoStar Group’s proprietary platform, supporting sales and research teams across our portfolio of brands - including Homes.com, CoStar.com, Apartments.com, and LoopNet.com.

At CoStar Group, we invest in early-career talent by providing hands-on learning opportunities, meaningful responsibilities, and clear pathways for professional growth. You'll be empowered to contribute ideas, solve complex challenges, and develop both the technical and collaborative skills needed to thrive in a fast-paced, innovative environment. CoStar Group offers competitive compensation, comprehensive benefits, performance-based career advancement, and the opportunity to help shape products that serve millions of users.

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

What You’ll do:

At CoStar Group, our engineering teams build innovative, scalable solutions while following industry best practices for software development. You'll collaborate with experienced engineers to write clean, maintainable code, develop automated tests, participate in code reviews, and contribute to cross-functional design and planning discussions.

Working alongside talented teammates, you'll gain hands-on experience with modern technologies including but not limited to leading JavaScript programming language and frameworks such as React, Vue, and Angular, Typescript, backend development language .NET, .NETCore, SQL, NoSQL, Postgres, AWS, Kafka, Databricks, and emerging AI-powered development tools like GitHub Copilot and Claude Code.

We're looking for curious, adaptable students who are eager to learn, embrace new technologies, and apply strong software engineering fundamentals to solve meaningful business challenges. This role provides the building blocks for a strong and rewarding technical career, offering mentorship, real-world experience, and continuous opportunities for professional growth.

Basic Qualifications:

• Currently pursuing a bachelor’s degree from an accredited, not-for-profit university or college in Computer Science, Software Engineering, or a comparable major.
• Must have an expected graduation date of December 2026 - June 2027.
• Minimum 3.0 cumulative GPA.
• At least 2 months of previous relevant internship or co-op experience.
• Experience applying software engineering fundamentals through coursework, projects, internships, or work experience.
• Ability to discuss prior internship, project, or academic work, including the problem solved, technical approach, collaboration, and outcomes.

Preferred Qualifications and Experiences:

• Experience writing understandable, maintainable, and well-documented code.
• Interest in learning new technologies and building high-quality software.
• Demonstrated initiative and collaboration through academic, internship, extracurricular, or team-based experiences.
• Familiarity with Agile development practices, the Software Development Lifecycle, APIs, web services, or application design concepts.
• Exposure to programming languages, databases, cloud concepts, AI/machine learning, frameworks, or other technical tools through coursework, projects, internships, or personal learning.

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)
• Access to CoStar Group’s 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 a variety of factors, including but not limited to, geographic location, skills, and competencies.

Base Compensation: $100,000 - $105,000 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.

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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