CoStar Group

Senior Software Engineer- CoStar Suite- Arlington, VA

CoStar Group$124K — $187K *
Enterprise Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree required from an accredited, nonprofit university.
  • Track record of commitment to prior employers.
  • 5+ years of production development experience with modern technologies (React, NodeJS, etc.).
  • Demonstrable history of building and launching successful products and platforms.
  • Experience designing systems for high availability and scalability.
  • Proficiency in cloud technologies (AWS, Azure, GCP).
  • Experience in Agile/Scrum and Continuous delivery practices.

Responsibilities

  • Architect scalable, resilient distributed systems for an enterprise platform.
  • Build responsive applications using technologies like React and Node.js.
  • Work with cloud-native services and microservices.
  • Optimize for performance, observability, and developer productivity.
  • Leverage AI tooling and automation for development processes.
  • Establish and influence an AI-first engineering culture.
  • Evaluate emerging technologies to enhance the technology platform.

Benefits

  • Comprehensive healthcare coverage: medical, vision, dental, and prescription drug plans.
  • Life, legal, and supplementary insurance options.
  • Virtual and in-person mental health counseling services.
  • Commuter and parking benefits.
  • 401(K) retirement plan with matching contributions.
  • Employee stock purchase plan.
  • Paid time off and tuition reimbursement.
  • On-site fitness center and/or reimbursed fitness membership costs.
  • Access to Employee Resource Groups for diversity and inclusion.
  • Complimentary snacks and drinks, including gourmet coffee and fresh fruit.
Full Job Description
Senior Software Engineer- CoStar Suite- Arlington, VA


Job Description


Senior Software Engineer- CoStar Suite

Arlington, VA

About the Role

As CoStars 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 toarchitect, innovate, and influence the future of intelligent applications at scale.

This position is located inArlington, VA and is in onsite Monday 6 Thursday, with the option to work from home on Friday.

Responsibilities

  • Architect scalable, resilient distributed systems 6 defining service boundaries, data contracts, and cross-team API standards for an enterprise-scale platform

  • Build responsive, high-performance applications usingReact, Node.js, Tailwind, etc.

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

  • Optimize forperformance, observability, and developer productivity

  • LeverageAI Tooling & Automation (CI/CD, code generation, test generation)

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

  • EstablishAI Culture & Mentorship(team upskilling, lifecycle redefinition)

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

  • Develop and maintain an in-depth working knowledge of the CRE Industry and CoStarsbusiness model / technology

Basic Qualifications

  • Bachelors 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 developmentexperience inmoderntechnologies, 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

Whats in it for you?

When you join CoStar Group, youll 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 Groups 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: $124,000 - $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.

#LI-MC5


About CoStar Group

CoStar Group is a provider of information, analytics and marketing services to the commercial property industry in the United States, Canada, the United Kingdom, France, Germany, and Spain. Founded in 1987 by Andrew C. Florance, the company has grown to include online database CoStar and many online marketplaces, including Apartments.com, LoopNet, Lands of America, and BizBuySell. CoStar Group was founded in 1987 by Andrew C. Florance in Washington, D.C. In 1998, the company became a public company via an initial public offering on the NASDAQ, raising $22.5 million. In 2004, CoStar Group, Inc. v. LoopNet, Inc. became a landmark case in copyright law. In October 2009, the company acquired a building in Washington, D.C., now its headquarters, from the Mortgage Bankers Association for $41.3 million. The building had sold 2 years earlier for $79 million and the company claims it used its analytics data to know the right time to buy. In April 2012, CoStar Group acquired LoopNet for $860 million. In April 2014, the company acquired Apartments.com for $585 million. In April 2015, the company acquired Apartment Finder for $170 million. In July, the company acquired Belbex an online marketplace and information provider for commercial property based in Spain. In February 2017, the company acquired Westside Rentals. In February 2018, the company acquired ForRent.com from Dominion Enterprises for $350 million in cash and $35 million in stock. In October, the company acquired Realla.co an online marketplace for commercial property based in the United Kingdom. In November, the company acquired Cozy Services for $68 million.
Learn more about CoStar Group
Size
4,742 employees
Market Cap
$31.3 billion
Industry
Net Income
$227.1 million
Founded
1987
5 Year Trend
+18.3%
Revenue
$1.6 billion
NASDAQ

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