Senior Edge Security Engineer
Job Description
Overview CoStar Group 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.  We are seeking a skilled Edge Security Engineer to join our Product Security team. This role focuses on maintaining and optimizing edge security controls across CoStar’s public-facing websites. You will be responsible for managing Akamai Kona WAF configurations, bot mitigation strategies, scraping protections, and other perimeter defenses to ensure high availability and secure access to our platforms. This position can be located in Arlington VA, Richmond VA, or Irvine CA and is in office Monday through Thursday and work from home on Friday. Responsibilities Lead CDN Security strategy and operations across CoStar's 50+ high-traffic web properties, including Akamai Kona policy design, tuning to minimize false positives, and protection against OWASP, DDoS, and emerging threat patterns. Drive bot management and anti-scraping across the portfolio.  This means policy design, score tuning, and digging into how scrapers are actually getting through, including residential proxy abuse and low-and-slow patterns. Analyze edge traffic patterns to detect anomalies and respond to security incidents. Support secure deployment and scaling of edge security controls across cloud and CDN environments. Provide edge security across 50+ high traffic websites, spanning distinct web tech stacks and threat profiles. 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. 4+ years of experience in edge security, web application security, or managing CDN security platforms such as Akamai, Cloudflare, Imperva, DataDome, Fastly, AWS WAF, or similar technologies for high-traffic web properties.  Equivalent depth in another security domain with significant CDN exposure is also considered. Hands-on experience with WAF policy tuning, bot management, and rate limiting on a major CDN platform. Familiarity with OWASP Top 10, API security best practices, and traffic analysis. Ability to collaborate across Product, Security, DevOps, Legal, and development teams. Demonstrated ability to author scripts or automation in Python, JavaScript, or similar languages. Experience with dashboards and log analysis tools such as Akamai WSA, OpenSearch, or Athena. Strong written and verbal communication skills with both technical and non-technical audience. Preferred Qualifications and Skills Hands-on experience across the Akamai security suite, including Kona Site Defender, Bot Manager, Client Reputation, and Site Shield. Experience designing and tuning bot detection across multiple signal types, including device fingerprinting, behavioral analysis, residential proxy detection, and machine learning scoring models. Familiarity with threat intelligence sources and using indicators (IPs, ASNs, fingerprints) to inform edge security policies. Experience leading or supporting security incidents at the edge, including DDoS mitigation, scraping events, or active exploitation of web applications. Scripting and Infrastructure as code proficiency (Python, Terraform, Ansible, etc.) for automation and reporting. Understanding how edge security integrates with origin infrastructure across public and private clouds. Familiarity with compliance frameworks (NIST, ISO 27001, PCI DSS). 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 offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training, and tuition reimbursement. Our benefits package includes (but is not limited to): 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) Access to CoStar Group’s 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: $120,000 – $203,000 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-AR
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. 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 37 years, giving us the perspective to create truly unique and valuable products and services. 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. 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. 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 recruitaccommodation@costar.com.

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