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CoStar • Arlington, Virginia, United States
Role & seniority: Lead Web App Penetration Tester (senior level)
Stack/tools: Web application pentesting; DAST/SAST/SCA; CI/CD security automation; credential scanning; IaC scanning; security tooling (Veracode, CheckMarx, AppScan, Snyk, OWASP ZAP, Burp Suite, Metasploit); programming: C#, Java, Python, Go, JavaScript, .NET; cloud-native environments
Conduct web app and underlying infrastructure penetration tests using manual and automated methods; assess risk and communicate findings to technical and non-technical stakeholders
Collaborate with software, product, DevOps, and security teams to embed secure design and secure coding practices across the SDLC; drive risk remediation
Automate security testing across CI/CD pipelines and generate developer work items/alerts; provide code change recommendations; support re-scans after remediation
5+ years total technical experience; 3+ years professional pentesting; web app pentesting experience; strong risk storytelling in reports
Defense-in-depth knowledge; scripting/programming skills (Python, PowerShell, Go, JavaScript, Java, C#, .NET)
Experience with SAST/SCA/DAST tools and CI/CD integration; familiarity with Burp Suite, OWASP ZAP, Metasploit, Acunetix, etc.
Relevant certifications (OSWA/OSWE, OSCP/OSEP, CTPs) or proven equivalent (CTFs, notable CVEs)
Lead Web App Pen Tester
Job Description
Overview
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 and the NASDAQ 100, 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. In this role, you will secure software and applications that power the worldwide real estate market. Work with 1,000+ software, QA, and operations engineers to secure applications during design, development, and production. The candidate will utilize threat modeling, white box application security analysis, and grey box penetration testing. This position will collaborate with software development teams, DevOps, and security to drive and shape the way our employees and engineers build, deploy, and operate applications. This position is located in Arlington, VA or Richmond, VA and is in office Monday through Thursday and work from home on Friday. Responsibilities Conduct penetration tests on web applications and underlying infrastructure for vulnerabilities using both manual and automated techniques Demonstrate risk of detected issues to both technical and non-technical audiences Work with the software and product teams to help ensure applications are designed and implemented securely during the SDLC Consume a variety of application security tools (DAST, SAST, SCA, Credential Scanning, IAC scanning) to secure web applications during development and production run-time Utilize sustainable methods to automate finding feedback to generate developer work items and trigger re-scan when associated work items are closed Recommend code changes to eliminate vulnerabilities Automate security testing at various stages within the CI/CD pipeline Basic Qualifications Bachelor’s Degree required from an accredited, not for profit university or college (preferably in Computer Science/Cybersecurity) A track record of commitment to prior employers 5+ years total experience in a technical role with at least 3+ year of professional experience penetration testing Experience with web application penetration testing, identifying and exploiting attack chains to evaluate the severity of vulnerabilities within a web application Experience writing comprehensive reports that clearly demonstrate the risk of vulnerabilities to developers and technical leadership Experience with defense-in-depth strategies to help mitigate existing risk within applications
Experience with common programming language: C# (preferred), Java, C/C++, Python, or Go Scripting/programming skills - Python, PowerShell, GoLang, Perl, JavaScript, .NET, API Integration Security tooling automation in CI/CD pipelines and IDE interfaces including Static Application Security Testing (SAST) and Static Application Analysis (SCA) solutions such as Veracode, CheckMarx, AppScan, X-Ray, Synopsys, or Snyk Dynamic application security testing (DAST) through Metasploit, Burp Suite, OWASP ZAP, Acunetix, etc.
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), with yoga studio, Pelotons, personal training, group exercise classes Access to CoStar Group’s Diversity, Equity, & Inclusion Employee Resource Groups Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks 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