Software Engineer II

CoStar Group, Inc.; Richmond (VA); Hybrid; USD 108,000 - 140,000; Full time

Job summary

CoStar Group is seeking a Software Engineer II to build high-performance web apps using React, TypeScript, and Tailwind CSS. You will design AI-powered features, integrate intelligent workflows, and contribute to shared component libraries while collaborating with cross-functional teams.

The role emphasizes mentoring, code quality, and staying current with emerging frontend technologies. Hybrid work in Richmond, VA with in-office near four days per week and one remote day.

Qualifications

• 3+ years of production development experience with modern front-end frameworks.
• Strong proficiency in React.js, TypeScript and Tailwind CSS.
• Deep understanding of HTML, CSS, JavaScript, and responsive design.
• Familiarity with RESTful APIs and front-end build tools (Webpack, Babel).
• Experience in Agile environments and in unit, performance, and automation testing.
• Familiarity with large language models (LLMs), prompt engineering, or agent-based architectures.

Responsibilities

• Develop and maintain engaging, responsive web applications using React, TypeScript, and Tailwind CSS.
• Design and implement AI-powered software solutions to enhance customer experience and platform intelligence.
• Build reusable UI components and libraries with emphasis on maintainability and performance.
• Collaborate with Product, Research, and Data teams to leverage AI-driven automation for business value.
• Write comprehensive tests (unit/integration) and participate in code reviews and pair programming.
• Mentor other developers and contribute to front-end architecture and best practices.

Skills

React.js

TypeScript

Tailwind CSS

HTML/CSS/JavaScript

RESTful APIs

Agile development

Testing (Jest/React Testing Library)

Code reviews / pair programming

Education

Bachelor's Degree

Tools

Redux

Context API

Git

Node.js

.NET Core

SQL Server

Dynamo

Elastic Search

AWS (S3, Lambda, SQS)

Kafka

Redis

Job description

Software Engineer II

Job Description

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.

Responsibilities

• Develop and maintain engaging, responsive, and high-performance web applications using React, TypeScript, and Tailwind CSS.
• Design and implement AI-powered software solutions that enhance the customer experience, improve platform intelligence, and unlock new product capabilities across CoStar brands.
• Build and integrate AI skills, agents, tools, and intelligent workflows into internal systems and customer-facing applications.
• Build reusable, scalable, and secure UI components and libraries with a focus on maintainability and performance.
• Collaborate with Product, Research, and Data teams to identify opportunities where AI-driven automation can create business value and improve decision-making.
• Contribute to and maintain shared component libraries and front-end architecture.
• Write comprehensive unit and integration tests using tools like Jest, React Testing library.
• Participate actively in code reviews, pair programming, and agile ceremonies.
• Take an active role in mentoring other developers.
• Be a subject matter expert in front-end technology stack.
• Continually evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strengthen CoStar's technology platform and development practices.

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.
• Familiarity with large language models (LLMs), prompt engineering, or agent-based architectures.
• 3+ years of production development experiencing using modern front-end frameworks.
• Strong proficiency in React.js, TypeScript and Tailwind CSS.
• Deep understanding of HTML, CSS, JavaScript, and responsive design.
• Solid understanding of RESTful APIs and familiarity with front-end build tools (e.g., Webpack, Babel).
• Strong grasp of web standards, accessibility, and security best practices.
• Experience working in Agile development environments.
• Experience in unit, performance and automation testing.

Preferred Qualifications

• Experience with any state management libraries like Redux, Context API.
• Experience implementing AI agents, workflow automation platforms, or intelligent search solutions.
• Experience applying AI-assisted software development practices to improve engineering productivity and code quality.
• Hands-on experience with CI/CD pipelines and version control using Git.
• Experience with .NET Core and SQL Server with the ability to integrate front-end components into a scalable, secure, and maintainable backend architecture.
• Experience with Relational Database Management Systems (SQL Server) and Document Data Systems (Dynamo, Elastic Search) a plus.
• Comfortable working across the stack with Node.js on the server-side.
• Nice to have experience with AWS S3, Lambda, SQS, Kafka, Redis.

Base Compensation: $108,000 - $140,000 Annually

This position is located in Richmond, VA and is in office Monday through Thursday with work from home on Friday.

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-CH1

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

CoStar Group 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 Group 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 sending an email to [e-mail].