Costar
Senior Full Stack Engineer
US-VA Arlington · Senior · Full-time
Work authorization required$143k-$187kDetected 5 hours ago
JavaScriptTypeScriptC#ReactViteNode.js.NETFull-Stack DevelopmentCode ReviewSQLDynamoDBAWSAzureKubernetesKafkaLLMsAR/VRResearchCommunication
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Cap-exempt (no lottery)0
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Entry-level history0
PERM / green-card track0
Lottery odds (Level IV)94
Fits your clock70
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About the role
- 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
Requirements
- 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
- CoStar Group (NASDAQ:
- CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces.
- This position is located in Arlington, VA and is in office Monday through Thursday with work from home on Friday.
Compensation
- $143,000 - $187,000 Annually
- Base Compensation: $143,000 - $187,000 Annually
Benefits
- 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
- Tuition reimbursement
- Our benefits package includes (but is not limited to):
- Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug
- On-site fitness center and/or reimbursed fitness center membership costs (location dependent)
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 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.
- This is how we deliver for our customers, our employees, and investors.
- 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.
Visa & Work Authorization
- However, please note that CoStar Group is not able to provide visa sponsorship for this position.
This listing is sourced directly from Costar's careers page and normalized into a canonical job model.