Technology Intern - Arlington, VA (Summer 2027)

CoStar Group, Inc.; Arlington (VA); Hybrid; USD 55,000 - 62,000; Part time

Benefits offered by this job

Mentor program

Hands-on internship experience

Job summary

CoStar Group, Inc. seeks a Technology Intern to help build software tools powering our proprietary platform. You’ll work with established engineers, receive mentorship, and contribute to real business initiatives across Homes.com, CoStar.com, Apartments.com, and LoopNet.com.

The program offers hands-on experience on enterprise projects, pairing each intern with a dedicated mentor to support technical development and career growth throughout the Summer 2027 internship in Arlington, VA.

Qualifications

• Currently pursuing a bachelor’s degree in Computer Science, Software Engineering, or a comparable major.
• Plan to return to school after Summer 2027 internship.
• Graduation date between Dec 2027 and Jun 2028.
• Minimum 3.0 GPA.
• Available for the full 10-week, 40-hour workweek internship.
• Apply with coursework, projects, internships, or work experience involving programming languages, software fundamentals, databases, cloud concepts, or related tools.

Responsibilities

• Assist in building software tools for CoStar Group’s platforms.
• Collaborate with engineers and mentors on enterprise‑level projects.
• Gain exposure to core software engineering principles while contributing to meaningful initiatives.

Skills

APIs and web services

Software engineering fundamentals

Problem solving

Education

CS/Software Engineering degree

Tools

TypeScript

React

Angular

Vue.js

Java

.NET

SQL

Python

Kubernetes

Docker

AWS

NoSQL databases

Elasticsearch

Kafka

Job description

Technology Intern - Arlington, VA (Summer 2027)

Job Description

Technology Intern – 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 are seeking a Technology Intern to join our team, where you’ll help build the software tools that power CoStar Group’s proprietary platform. These tools support our sales and research teams across leading real estate marketplaces, including Homes.com, CoStar.com, Apartments.com, and LoopNet.com. CoStar Group’s technology internship program provides hands‑on experience with enterprise‑level projects. Interns work alongside full‑time engineers, contributing to meaningful business initiatives and gaining exposure to core software engineering principles. Each intern is paired with a dedicated mentor to support technical development, career growth, and day‑to‑day learning throughout the program. This position is located inArlington, VAand offers a schedule of Monday to Thursday in office and the option to work from home on Friday.

Technologies We Use:

At CoStar Group, our technology teams use a wide range of tools and technologies to build products that support our real estate marketplaces and internal business systems. Depending on the team and project, interns may gain exposure to technologies such as TypeScript, React, Angular, Vue,js, Java, C#, .NET, SQL, Python, Kotlin, Swift, AWS, Kubernetes, Docker, NoSQL databases, Elasticsearch, Kafka, and emerging AI tools, although some teams may vary. Interns may also have the opportunity to learn about AI-related areas such as machine learning, large language models, natural language processing, computer vision, AI APIs, prompt engineering, and model evaluation. You do not need experience with every technology listed to apply. We are looking for students who are curious, adaptable, and excited to learn new tools while applying strong software engineering fundamentals.

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 be planning to return to school following the completion of the Summer 2027 internship.
• Must have an expected graduation date of December 2027 - June 2028
• Minimum 3.0 cumulative GPA
• Available to participate in the full 10-week summer internship program and commit to a 40-hour work week throughout the internship.
• Coursework, project, internship, or work experience applying programming languages, software engineering fundamentals, databases, cloud concepts, frameworks, or other technical tools to build or improve software used by the team (or similar/comparable technology)

Preferred Qualifications:

• Ability to write understandable, maintainable, and well‑documented code.
• Interest in learning new technologies and building high‑quality software.
• Demonstrated initiative through academic, internship, project, or extracurricular experiences.
• Experience collaborating on academic, internship, project, or team‑based work.
• Familiarity with Agile development practices and the Software Development Lifecycle
• Understanding of web services, APIs, or application design concepts, such as REST or GraphQL.
• Exposure to AI, machine learning, data science, or emerging technology concepts through coursework, projects, internships, or personal learning.
• Experience building or contributing to technical projects, such as capstone projects, personal applications, research, open‑source contributions, or class‑based software projects.

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. 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: $40 - $45 (Hourly)

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.

Equal Employment Opportunity Statement

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

Founded in 1987, CoStar Group, Inc. (Nasdaq:CSGP) is the leading provider of commercial real estate information, analytics and online marketplaces. CoStar conducts expansive, ongoing research to produce and maintain the largest and most comprehensive database of commercial real estate information. CoStar data powers the $17 trillion world of real estate – delivering the sale, lease, property, tenant, contact, reporting and industry information that makes connections happen. We help our clients make smart investments and decisions. Eighty‑three percent of the nation’s commercial real estate transactions involve a CoStar subscriber, and the top 95% of the leading 1,000 brokerage firms use CoStar to inform their decisions. We also help create lasting experiences through our family of marketplaces. In addition to CoStar, CoStar Group brands and marketplaces include LoopNet, Apartments.com, BizBuySell, and Lands of America – collectively attracting more than 25 million monthly unique visitors. The Apartments.com Network is the nation’s #1 most visited apartment listing network, with 45 million monthly visits, allowing renters to find their perfect homes. LAND.com connects landowners to their perfect properties, spots and open spaces. BizBuySell allows small business owners to bring their dreams to life. And LoopNet connects investors, sellers and brokers with clients who fall in love with their properties. Headquartered in Washington, DC, CoStar maintains offices throughout the U.S. and in Europe and Toronto, Canada with a staff of approximately 3,700 worldwide, including the industry's largest professional research organization. CoStar 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 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 calling 1-855-840-1715 or by sending an email to [e-mail].