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Internship Web App Penetration Testing Jobs in California

LPL Financial

AVP, Penetration Tester

San Diego, CA · On-site

Conduct tactical penetration testing assessments of web, mobile, and API applications against OWASP Top 10 threats and emerging risks, and collaborate with Application Security teams to provide ...

MM International

Penetration Tester

San Francisco, CA · On-site

Penetration Tester / Security Analyst Location: San Francisco, CA, Onsite- Relocation works ... VAPT , Web/API/Thick Client Security Testing * Tools: Burp Suite, Metasploit, Nessus, Core Impact ...

Tekskills

Security Tester

Sunnyvale, CA · On-site

Good knowledge of Secure code Analysis and Web penetration testing. Good experience in HP Fortify and WebInspect tool. Top 3 responsibilities you would expect the Subcon to shoulder and execute:

SHEIN

Senior Security Engineer

Los Angeles, CA · On-site

$123K - $169K/yr

Hands-on experience with web application vulnerability assessments and penetration testing. * Familiarity with bug bounty platforms (e.g., HackerOne, Bugcrowd) and triage workflows. * Strong ...

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Internship Web App Penetration Testing information

What is an internship web app penetration tester?

An Internship Web App Penetration Tester is a student or entry-level professional who assists in assessing the security of web applications by simulating cyberattacks. Their role involves identifying vulnerabilities, exploiting potential weaknesses, and documenting findings under the guidance of experienced security professionals. This hands-on experience helps interns learn about common web application threats, security tools, and best practices in cybersecurity. The position is often part of a learning program to prepare individuals for a career in penetration testing or information security.

What types of tasks and projects can I expect to work on during an internship in web app penetration testing?

As an intern in Web App Penetration Testing, you'll typically assist with vulnerability assessments, security testing of web applications, and documentation of your findings. You'll likely use tools such as Burp Suite, OWASP ZAP, and manual testing methods to identify common vulnerabilities like SQL injection and cross-site scripting. Interns often work closely with experienced penetration testers and developers, learning how to communicate security risks and collaborating on solutions. This hands-on experience provides valuable insight into secure coding practices and real-world remediation processes.

What are the key skills and qualifications needed to thrive as an internship web app penetration tester, and why are they important?

To thrive as an Internship Web App Penetration Tester, you need a foundational understanding of web application architectures, common vulnerabilities (like those in OWASP Top 10), and basic programming or scripting knowledge. Familiarity with tools such as Burp Suite, OWASP ZAP, and basic command-line utilities, along with ongoing coursework or certifications like CompTIA Security+ or OSCP, is highly beneficial. Strong analytical thinking, attention to detail, and effective written communication make candidates stand out in this field. These skills ensure interns can identify, document, and help remediate security weaknesses, contributing to safer web applications.

What are the most commonly searched types of Web App Penetration Testing jobs in California?

The most popular types of Web App Penetration Testing jobs in California are:

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For Internship Web App Penetration Testing jobs in California, the most frequently searched job titles are:

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Cities in California with the most Internship Web App Penetration Testing job openings:

Internship Web App Penetration Testing jobs near you
Infographic showing various Internship Web App Penetration Testing job openings in California as of August 2026, with employment types broken down into 20% Internship, 40% Full Time, and 40% Contract. Highlights an 100% In-person job distribution.

Senior Specialist, MAST Application Penetration Tester

KPMG US

San Francisco, CA • On-site

Full-time

Re-posted 22 days ago

Job description

Job Summary:
KPMG is currently seeking a Senior Specialist, MAST Application Penetration Tester to join our Managed Services practice. The role involves conducting manual application penetration testing and executing threat modeling while demonstrating application testing experience.
Responsibilities:
• Conduct manual application penetration testing against API's (REST/SOAP), Web Applications, Mobile applications, and thick client applications
• Perform objective based on abstract penetration testing engagements
• Execute threat modeling, evaluate application business logic, and perform application architecture reviews
• Demonstrate application testing experience in real time via demos to both internal and external audiences
• Function independently in penetration testing engagements, with minimal oversight and guidance
• Act with integrity, professionalism, and personal responsibility to uphold KPMG's respectful and courteous work environment
Qualifications:
Required:
• Minimum three years of recent experience in application penetration testing of Application Programming Interface (API's), web applications, or mobile applications
• Bachelor's degree from an accredited college/university or equivalent industry experience
• Ability to communicate reporting results with technical and non-technical audiences and lead remediation conversations
• Experience with burp suite pro, and other app testing tools such as Netsparker and Checkmarx
• Ability to travel as required
• Must be authorized to work in the U.S. without the need for employment-based visa sponsorship now or in the future. KPMG LLP will not sponsor applicants for U.S. work visa status for this opportunity (no sponsorship is available for H-1B, L-1, TN, O-1, E-3, H-1B1, F-1, J-1, OPT, CPT or any other employment-based visa)
Preferred:
• One or more major ethical hacking certifications not required but preferred; GIAC Web Application Penetration Tester (GWAPT), Council for Registered Ethical Security Testers (CREST), Offensive Security Web Expert (OSWE), Offensive Security Web Assessor (OSWA)
Company:
KPMG is one of the world’s leading professional services firms and the fastest growing Big Four accounting firm in the United States. Founded in 2010, the company is headquartered in New York, USA, with a team of 10001+ employees. The company is currently Late Stage.

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