Senior Software Engineer- CoStar Suite- Arlington, VA

Senior Software Engineer- CoStar Suite- Arlington, VA

Job Description

Senior Software Engineer - CoStar Suite

Arlington, VA

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 Inde x , 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.

About CoStar Suite

CoStar Suite is the global leader in commercial real estate information, analytics and news. Commercial Real Estate industry professionals around the globe use CoStar Suite to access the most comprehensive data to make decisions with confidence. CoStar Suite delivers immediate, verified commercial real estate information on over 5.9 million properties across every market. Learn more about CoStar .

About the Role

As CoStar’s next Senior Software Engineer, you will contribute to the build of a greenfield, enterprise-scale web application infused with AI , leveraging modern technologies and frontier models. Drive the development of AI-powered product experiences while shaping AI-first engineering workflows that redefine how software is built. This is a high-impact role to architect , innovate , and influence the future of intelligent applications at scale.

This position is located in Arlington, VA and is in onsite Monday – Thursday, with the option to work from home on Friday.

Responsibilities

Architect scalable, resilient distributed systems - defining service boundaries, data contracts, and cross-team API standards for an enterprise-scale platform

Build responsive, high-performance applications using React , Node.js , Tailwind, etc.

Work with cloud-native services (Azure/AWS/GCP), containers, and microservices

Optimize for performance, observability, and developer productivity

Leverage AI Tooling & Automation (CI/C D , code generation, test generation)

Influence and establish AI-first engineering practice (vibe coding, human-in-the-loop, debugging)

Establish AI Culture & Mentorship (team upskilling, lifecycle redefinition)

Continually evaluate emerging technologies to identify opportunities, trends and best practices that can be used to strengthen CoStar’s technology platform and development practices

Develop and maintain an in-depth working knowledge of the CRE Industry and CoStar’s business model / technology

Basic Qualifications

Bachelor’s Degree required from an accredited, not for profit , in-person university or college.

A track record of commitment to prior employers

5 + years of production development experience in modern technologies, like React, Vue, TypeScript, NodeJS, C#, .Net , OpenSearch, Kafka, SQL, NoSQL

A demonstrable track record of building and launching successful products and platforms

Experience designing for high availability, horizontal scalability, and production observability at enterprise scale

Experience with cloud technologies like AWS, Cloud Managed Services, etc.

Experience in Agile/Scrum processes, and Continuous delivery practices

Experienced in unit, performance, and automation testing

Experience leveraging AI to improve productivity (design, development, testing, review, etc.)

Deeply understand what drives the business for which you are building software

Take an active role in mentoring developers with ability to build consensus

Preferred Qualifications and Skills

Experience managing a large Enterprise level code base, code quality and dependencies

Experience with C#, NodeJS, and/or React in particular

Build Agents and Workflows using modern AI patterns

Leverage Vibe coding to improve productivity and quality

Experience implementing AI powered product features

Excellent written and verbal communication skills

Commercial Real Estate (CRE) knowledge is a bonus

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 .

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 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: $1 24,000 - $ 187 ,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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