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Freelance Web App Penetration Testing Jobs (NOW HIRING)

Perform web app penetration testing (manual/automated). * Evaluate SAST/DAST findings and manage issues in Jira. * Validate bug bounty vulnerabilities. * Translate business requirements into ...

Perform web app pentests. * Perform vulnerability risk assessments. * Perform physical pentests and ... Must have experience with penetration testing tools. * Must have experience in web development and ...

GIAC Web Application Penetration Tester (GWAPT) * GIAC Exploit Researcher and Advanced Penetration Tester (GXPN) * GIAC Assessing and Auditing Wireless Networks (GAWN) Blue Teaming Certifications:

GIAC Web Application Penetration Tester (GWAPT) * GIAC Exploit Researcher and Advanced Penetration Tester (GXPN) * GIAC Assessing and Auditing Wireless Networks (GAWN) Blue Teaming Certifications:

GIAC Web Application Penetration Tester (GWAPT) * GIAC Exploit Researcher and Advanced Penetration Tester (GXPN) * GIAC Assessing and Auditing Wireless Networks (GAWN) Blue Teaming Certifications:

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How much do freelance web app penetration testing jobs pay per hour?

As of Jun 13, 2026, the average hourly pay for freelance web app penetration testing in the United States is $34.86, according to ZipRecruiter salary data. Most workers in this role earn between $28.85 and $40.87 per hour, depending on experience, location, and employer.

What are some common challenges freelance web app penetration testers face when working with clients remotely?

Freelance web app penetration testers often encounter challenges such as limited access to in-depth application documentation, coordinating testing schedules across different time zones, and ensuring clear communication about testing scope and reporting expectations. Building trust with new clients can also be tricky, especially when handling sensitive data or recommending remediation steps. Successful testers proactively address these issues by setting clear agreements, using secure communication tools, and providing concise, actionable reports that demonstrate professionalism and value.

What is the difference between Freelance Web App Penetration Testing vs Freelance Cybersecurity Consultant?

AspectFreelance Web App Penetration TestingFreelance Cybersecurity Consultant
CertificationsOSCP, CEH, OSWECISSP, CISA, CEH
Work EnvironmentFocused on web application security testingBroader security strategy and risk management
Industry UsageWeb development, tech startups, security firmsAll industries requiring security advice
Search IntentWeb app testing freelance jobsSecurity consulting freelance opportunities

Freelance Web App Penetration Testing specializes in testing web applications for vulnerabilities, often requiring specific certifications like OSCP or OSWE. Freelance Cybersecurity Consultants provide broader security advice across systems, networks, and policies, with certifications like CISSP or CISA. While both roles involve security expertise, web app penetration testers focus on application-specific testing, whereas cybersecurity consultants offer comprehensive security strategies.

What is freelance web app penetration testing?

Freelance web app penetration testing is the process where independent security professionals are hired to assess the security of web applications. These testers simulate cyberattacks to identify vulnerabilities in a web app's code, configuration, and deployment. Their findings help organizations fix security issues before attackers can exploit them. Freelancers typically work on a project-by-project basis and may serve clients ranging from startups to large enterprises.

What are the key skills and qualifications needed to thrive as a Freelance Web App Penetration Tester, and why are they important?

To thrive as a Freelance Web App Penetration Tester, you need a strong understanding of web application security, vulnerability assessment, and common attack vectors, often supported by certifications like OSCP or CEH. Proficiency with tools such as Burp Suite, OWASP ZAP, and scripting languages (e.g., Python) is typically required. Excellent analytical thinking, problem-solving skills, and clear client communication set top testers apart. These skills and qualifications are vital to accurately identify threats, deliver actionable reports, and maintain client trust in a constantly evolving security landscape.
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Infographic showing various Freelance Web App Penetration Testing job openings in the United States as of June 2026, with employment types broken down into 63% Full Time, 30% Part Time, and 7% Contract. Highlights an 96% Physical, 1% Hybrid, and 3% Remote job distribution, with an average salary of $72,500 per year, or $34.9 per hour.
Penetration Tester

Other

Medical, Dental, Life, Retirement, PTO

Posted 7 days ago


Job description

Open Systems Technologies Corporation is a leader in the government contracting marketplace, providing Enterprise Security and Cloud Computing solutions to support large organizations. Our capabilities include supplying federal government entities and private businesses with software development, scientific and engineering technical assistance, systems integration, and enterprise security. Since its founding in 1996, OST has been committed to delivering high-quality, best-in-class results that bring added value to our clients while investing in our employees’ futures by providing exciting projects to work on, and robust benefits to include technical training and certifications, relocation assistance and a 401K match with immediate vesting.

Open Systems Technologies Corporation is looking for a Lead Penetration Tester to join a high performing agile team that uses the Scaled Agile Framework (SAFe) methodology to support a nationally significant and fast-paced program.

A Lead Penetration Tester is needed to join a high performing agile team using the Scaled Agile Framework (SAFe) methodology on a large, complex program that provides system engineering, development, test, integration and operational support. The selected individual will work on a team of cyber Subject Matter Experts (SMEs) who are providing support to a large, complex technical program for preventing, identifying, containing and eradicating cyber threats to networks through monitoring, intrusion detection, and protective security services on information systems including local area networks/wide area networks (LAN/WAN), commercial Internet connections, public facing websites, security devices, servers and workstations. She/he will be responsible for the overall security of Enterprise-wide information systems, and will collect, investigate, and report any suspected and confirmed security violations.

Primary Responsibilities

  • Perform internal and external pentests against systems to determine vulnerabilities and develop mitigation strategies.
  • Perform web app pentests.
  • Perform vulnerability risk assessments.
  • Perform physical pentests and social engineering analysis.
  • Perform cyber incident response as needed.
  • Evaluate the impact of new development on the operational security posture of IT systems.
  • Evaluate, review, and test critical software.
  • Formulate security compliance requirements for new system features.
  • Identify and remediate security issues throughout the system.
  • Audit and assess system security configuration settings using common methodologies and tools.
  • Work with development teams to enrich team-wide understanding of different types of vulnerabilities, attack vectors, and remediation approaches.
  • Work closely with System Engineering, Test Engineering, and Integration teams to ensure hardware and software architecture and implementations meet strict security requirements.
  • Propose, assess, coordinate, implement, and enforce information systems security policies, standards, and methodologies.
  • Serve as a Subject Matter Expert in security architecture, to include providing advice to Program Managers, Customer technical experts, and internal program teams.

Basic Qualifications

  • Must have experience with penetration testing tools.
  • Must have experience in web development and programming languages such as Java, XML, Perl and HTML.
  • Must have experience with programming/scripting in Python, Powershell, C, JavaScript, etc.
  • Must have extensive experience performing IT security risk assessments.
  • Must have experience performing web app and physical pentests.
  • Must have experience with or strong familiarity of the following Web Application tools; Burp Suite, Web Inspect, Appdetective.
  • Must have experience with or strong familiarity of Kali.
  • Must have experience with or strong familiarity of IPS/IDS solutions.
  • Must have a strong understanding of the Cyber Kill Chain methodology.
  • Must have experience applying Risk Management Framework.
  • Must have experience with secure configurations of commonly used desktop and server operating systems.
  • Must have the ability to effectively collaborate with technical staff and customers to form mitigation strategies and plan for continuous modernization and legacy integration.
  • Must have experience managing multiple projects simultaneously and quickly and effectively adjusting to shifting priorities in resolving issues.

Preferred Qualifications

  • Bachelor's degree in a technical/information assurance field and at least 12 years of relevant experience.
  • Certifications in one or more of the following areas strongly preferred:
    • GIAC Web Applications Penetration Tester (GWAPT)
    • GIAC Penetration Tester (GPEN)
    • Certified Ethical Hacker (CEH)
    • Certified Information Security Manager (CISM)
    • Certified Web Application Defender (GWEB)
    • Certified Information System Security Professional (CISSP)
  • Extensive experience developing/implementing integrated security services management processes, such as assessing and auditing network penetration testing, anti-virus planning assistance, risk analysis, and incident response.
  • Extensive experience providing information assurance support for application development that includes system security certifications and project evaluations for firewalls that encompass development, design, and implementation.?

BENEFITS

OST is an Equal Opportunity Employer and has been operating since 1996 providing support on various contracts with Government agencies. We offer a comprehensive benefits package that includes 3 weeks paid time off, 11 Federal Holidays, medical/dental coverage, STD, LTD, Life Insurance, AD&D, 401k with up to 4% match, and end-of-year profit sharing.