Summer 2027 Technology Intern - Sunnyvale, CA

CoStar; Sunnyvale (CA); Hybrid; USD 55,000 - 62,000; Full time

Job summary

CoStar Group in Sunnyvale, CA is seeking a Technology Intern to help build software tools for our real estate platforms. Interns work alongside full‑time engineers and are paired with a dedicated mentor to support development and career growth.

This 10‑week program offers exposure to TypeScript, React, Python, AWS, Kubernetes, Docker, REST/GraphQL, with a Monday–Thursday in‑office schedule and an option to work from home Fridays.

Qualifications

• Pursuing a Bachelor’s degree in CS/Software Engineering and plan to return to school after the internship.
• Graduation date expected between December 2027 and June 2028.
• Minimum 3.0 GPA.
• Available for a 10-week, 40-hour work week.
• Experience applying programming languages and software fundamentals.

Responsibilities

• Assist in building software tools powering CoStar Group’s platforms.
• Collaborate with mentors and engineers on enterprise‑level projects.
• Contribute to meaningful initiatives and learn core software engineering practices.

Skills

Programming fundamentals

Curiosity to learn

Team collaboration

Software engineering fundamentals

Web services APIs

Education

Bachelor's degree in CS/Software Engineering

Tools

TypeScript

React

Java

Python

AWS

Kubernetes

Docker

REST/GraphQL

Job description

Summer 2027 Technology Intern - Sunnyvale, CA

Job Description

Technology Intern – Sunnyvale, CACompany 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 in Sunnyvale, CA and 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 Three.js, 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.

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

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