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# Software Engineer II

- **Company:** CoStar Realty Information Inc.
- **Location:** Richmond, VA, United States (Remote available)
- **Experience:** Experienced
- **Salary:** $108,000.0 - $140,000.0
- **Contract:** Permanent contract
- **Skills:** AI Evaluation, .NET Framework, Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Amazon S3, Applications Architecture, Software Applications, Automated Storage and Retrieval Systems, Automation of Tests, C Sharp (Programming Language), Code Review, Continuous Integration, Decision-Making Software, DevOps, Distributed Systems, Amazon DynamoDB, Elasticsearch, Enterprise Messaging Systems, Microsoft SQL Server, Redis, Software Tools, Microsoft Copilot, Systems Integration, TypeScript, Web Applications, Cloud Platform System, Chatbots, Spring Cloud, ReactJS, Large Language Models, Prompt Engineering, Generative AI, Agentic-AI, Kubernetes, Apache Kafka, Web Technologies, Virtual Agents, Functional Programming, Serverless Computing
- **Published:** October 15, 2026
- **Apply:** https://costar.wd1.myworkdayjobs.com/CoStarCareers/job/US-VA-Richmond---CoStar-Tower/Software-Engineer-II_R40151

## About the Role

* Bachelor's degree from an accredited, not-for-profit, in-person university or college.
 * 3+ years of experience designing, building, deploying, and supporting production-grade software applications.
 * Experience developing full-stack applications with modern web technologies such as React, TypeScript, C#, .NET, SQL Server, AWS, or comparable technologies.
 * Familiarity with building or integrating AI-powered applications, including AI agents, LLM-powered workflows, chatbots, copilots, or agent-based systems.
 * Software engineering fundamentals across application architecture, testing, security, performance, and modern development practices.
 * Experience collaborating across engineering, product, and business teams in an agile environment.
 * Track record of commitment to prior employers., * Experience building and deploying agentic AI solutions that reason, plan, make decisions, interact with tools, and automate complex business workflows.
 * Experience with retrieval-augmented generation (RAG), prompt engineering, tool-calling frameworks, AI evaluation, or orchestration platforms.
 * Experience developing distributed systems or cloud-native applications on AWS or a comparable cloud platform.
 * Familiarity with Kafka, Redis, Elasticsearch, DynamoDB, S3, Lambda, or similar scalable data and messaging technologies.

## Description

We are seeking a Software Engineer II who excels at designing and architecting modern web applications. This engineer would support our Web Enterprise team in building the software tools that power our proprietary CRM platform and support our sales, research and customer support teams across Homes.com, Costar.com, Apartments.com, LoopNet.com, and more.

CoStar is investing heavily in artificial intelligence to accelerate software delivery, improve platform observability, automate research and business workflows, enhance product experiences through intelligent agents and skills, and improve data quality across enterprise systems. Successful candidates will demonstrate a willingness to learn, adopt, and apply AI technologies responsibly to solve complex business and engineering challenges.

This position is located in Richmond, VA and is in office Monday through Thursday with work from home on Friday., * Design, develop, and maintain scalable full-stack applications, APIs, and cloud-native services that power critical customer and business workflows.

 * Contribute to AI-powered products, intelligent agents, and automation capabilities that enhance user experiences, increase productivity, and unlock new platform capabilities.
 * Work on modern AI solutions, including LLM-powered workflows, retrieval systems, and intelligent decision-making tools across customer-facing and internal applications.
 * Collaborate with Product, Data Science, and Engineering teams to identify opportunities where AI and automation can drive measurable business impact and operational efficiency.
 * Deliver secure, high-performance, and maintainable software through modern engineering practices, including automated testing, CI/CD, code reviews, and observability.
 * Continuously evaluate emerging technologies, AI frameworks, and industry trends to strengthen CoStar's technology ecosystem and accelerate innovation.