Costar
Senior Full Stack Engineer
US-VA Arlington · Senior · Full-time
Work authorization required$143k-$187kDetected 12 hours ago
JavaScriptTypeScriptC#ReactViteNode.js.NETFull-Stack DevelopmentCode ReviewSQLDynamoDBAWSAzureKubernetesKafkaLLMsAR/VRResearchCommunication
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odds of building a lasting career here
37Unrated
Cap-exempt (no lottery)0
Sponsors this role0
Entry-level history0
PERM / green-card track0
Lottery odds (Level IV)94
Fits your clock70
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About the role
- 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, insights and connections that improve their businesses and lives.
- 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.
Responsibilities
- Build big, distributed, API-driven systems for tens of thousands of users.
- Build and integrate AI skills, agents, tools, and intelligent workflows into internal systems and customer-facing applications across CoStar brands, improving platform intelligence and unlocking new product capabilities.
- Build and maintain customer-facing and internal web applications using React/TypeScript.
- Drive and lead software design, development standards, and code review practices.
- Collaborate with Product, Research, and Data teams to identify opportunities where AI-driven workflows and automation can create business value and improve decision-making.
- We continue that effort today and are always working to improve and drive innovation.
- CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing
- We have been living and breathing the world of real estate information and online marketplaces for over 37 years, giving us the perspective to create truly unique and valuable products and services.
- This is how we deliver for our customers, our employees, and investors.
- CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces.
Requirements
- You can request reasonable accommodations by sending an email to recruitaccommodation@costar.com.
- 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 experience with TypeScript and modern frontend and backend JS tooling (e.g. Node, Vite, React, etc.).
- Experience with Infrastructure as Code (IaC) tools such as Terraform.
- Working knowledge and experience with cloud-based platforms (AWS or Azure).
- Familiarity with using large language models (LLMs), context engineering, or agent-based architectures.
- Experience working with monitoring, telemetry, observability, or automated diagnostics platforms.
- Strong understanding of data quality principles, data governance concepts, and data-centric application design.
Nice to have
- Experience with React Router Framework and Effect.
- SQL and database development knowledge.
- Experience using observability and APM platforms like Datadog.
- Familiarity with services such as Kafka, DynamoDB, and SQS.
- Experience with deploying to Kubernetes, EKS, and ECS.
- Experience implementing MCP clients and servers, workflow automation platforms, or intelligent search solutions.
- Experience applying AI-assisted software development practices to improve engineering productivity and code quality.
Skills
- Produce code that is robust, efficient, and maintainable; our primary tools are TypeScript, C#,.NET, SQL Server, AWS.
Compensation
- $143,000 - $187,000 Annually We welcome all qualified candidates who are currently eligible to work full-time in the United States to apply.
- Base Compensation: $143,000 - $187,000 Annually We welcome all qualified candidates who are currently eligible to work full-time in the United States to apply.
Benefits
- CoStar Group also invests in your professional and academic growth with internal training, and tuition reimbursement.
Company info
- 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've continually refined, transformed and perfected our approach to our business, creating a language that has become standard in our industry and for our customers.
- 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.
- 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.
Equal opportunity
- CoStar Group is committed to creating a diverse environment and is proud to be an equal opportunity workplace and affirmative action employer.
Visa & Work Authorization
- However, please note that CoStar Group is not able to provide visa sponsorship for this position. #LI-AR
This listing is sourced directly from Costar's careers page and normalized into a canonical job model.