Penetration Tester (Mobile, API & Application Security)

Penetration Tester (Mobile, API, and Application Security)

We are seeking a Penetration Tester (Mobile, API, and Application Security) to support the effectiveness of our enterprise information security program. In this role, you will perform penetration testing and security assessments of mobile, API, web, and AI-enabled applications to identify vulnerabilities, validate risk, and support remediation efforts that enhance the organization's security posture.

Responsibilities

• Perform penetration testing of mobile (Android and iOS), API, and web applications using manual and tool-assisted techniques.
• Identify security vulnerabilities and, where appropriate, demonstrate impact through controlled exploitation.
• Document findings clearly, including risk ratings and remediation recommendations, for technical and non-technical stakeholders.
• Apply established testing methodologies, standards, and playbooks while continuing to build practical exploitation skills.
• Research and apply knowledge of emerging threats, tools, and techniques, including AI and application security risks, during assessments where applicable.
• Participate in security assessments of AI-enabled applications and services, including systems incorporating machine learning models, APIs, or large language models (LLMs).
• Contribute to team initiatives such as process improvements, internal documentation, tool usage, and knowledge sharing.
• Collaborate with peers and stakeholders during engagements and remediation discussions.

Basic Qualifications

• Bachelor's degree in Engineering or Science, or equivalent work experience.
• Five or more years of experience in information security.
• Two or more years of experience in one or more of the following:
• IT infrastructure management
• Application architecture
• Risk management
• Data architecture
• Middleware technology
• IT operations or project management

Required Skills / Experience

• Mobile Application Security
• 3+ years of hands-on experience testing Android and/or iOS applications.
• Working knowledge of mobile platform security risks and common weaknesses.
• Familiarity with OWASP MASVS and MASTG.
• Web & API Penetration Testing
• Practical understanding of the OWASP Top 10 and OWASP API Security Top 10.
• Experience identifying authentication, authorization, input validation, and business logic vulnerabilities.
• Manual Testing & Tool Usage
• Proficiency with Burp Suite (Community or Pro), Postman, or Insomnia.
• Ability to perform manual testing beyond automated scanner output.
• Cloud & Platform Familiarity
• Exposure to AWS and/or Azure environments.
• Basic familiarity with cloud-hosted or containerized application architectures.
• Technical Foundations
• Working knowledge of authentication and authorization (OAuth, JWT), and general networking concepts.
• Experience or familiarity with Python, Bash, or PowerShell scripting is preferred.
• AI & Emerging Technology Security
• Familiarity with AI and machine learning security concepts.
• Awareness of common AI-related risks, including prompt injection, insecure model or API access, and data leakage.
• Understanding of how AI security risks intersect with traditional application and API testing.
• Tooling & Testing Environment
• Exposure to tools such as Nmap, Metasploit, and Kali Linux.
• Interest in contributing to light automation or scripting to improve testing efficiency.
• Communication & Documentation
• Ability to produce clear, well-structured written findings and remediation guidance.
• Comfortable discussing security findings with engineers, application owners, and security partners.
• Preferred Skills / Experience
• Mobile reverse-engineering fundamentals (e.g., JADX, Frida).
• Source code review familiarity.
• Experience with vulnerability management or tracking tools (e.g., ServiceNow).
• Understanding of secure development and change management concepts.
• Hands-on experimentation with AI or LLM-based applications in testing, research, or academic contexts.
• Familiarity with AI security testing, red-teaming tools, or proof-of-concept exercises.
• Understanding of ethical and responsible AI security testing principles.
• Certifications (Preferred, Not Required)
• GMOB, GWAPT, OSCP, GPEN, or equivalent practical security certifications.

This role requires working from a U.S. Bank location three (3) or more days per week.

If there's anything we can do to accommodate a disability during any portion of the application or hiring process, please refer to our disability accommodations for applicants.

Benefits:

• Healthcare (medical, dental, vision)
• Basic term and optional term life insurance
• Short-term and long-term disability
• Pregnancy disability and parental leave
• 401(k) and employer-funded retirement plan
• Paid vacation (from two to five weeks depending on salary grade and tenure)
• Up to 11 paid holiday opportunities
• Adoption assistance
• Sick and Safe Leave accruals of one hour for every 30 worked, up to 80 hours per calendar year unless otherwise provided by law

U.S. Bank is an equal opportunity employer. We consider all qualified applicants without regard to race, religion, color, sex, national origin, age, sexual orientation, gender identity, disability or veteran status, and other factors protected under applicable law.

E-Verify

U.S. Bank participates in the U.S. Department of Homeland Security E-Verify program in all facilities located in the United States and certain U.S. territories. The E-Verify program is an Internet-based employment eligibility verification system operated by the U.S. Citizenship and Immigration Services. Learn more about the E-Verify program.

The salary range reflects figures based on the primary location, which is listed first. The actual range for the role may differ based on the location of the role. In addition to salary, U.S. Bank offers a comprehensive benefits package, including incentive and recognition programs, equity stock purchase 401(k) contribution and pension (all benefits are subject to eligibility requirements). Pay Range: $105,400.00 - $124,000.00

U.S. Bank will consider qualified applicants with arrest or conviction records for employment. U.S. Bank conducts background checks consistent with applicable local laws, including the Los Angeles County Fair Chance Ordinance and the California Fair Chance Act as well as the San Francisco Fair Chance Ordinance. U.S. Bank is subject to, and conducts background checks consistent with the requirements of Section 19 of the Federal Deposit Insurance Act (FDIA). In addition, certain positions may also be subject to the requirements of FINRA, NMLS registration, Reg Z, Reg G, OFAC, the NFA, the FCPA, the Bank Secrecy Act, the SAFE Act, and/or federal guidelines applicable to an agreement, such as those related to ethics, safety, or operational procedures.

Applicants must be able to comply with U.S. Bank policies and procedures including the Code of Ethics and Business Conduct and related workplace conduct and safety policies.

Posting may be closed earlier due to high volume of applicants.