Senior Application Security Researcher

At Bishop Fox, security isn't just a job—it's our passion. As leaders in continuous offensive security and penetration testing, we deliver world-class customer experiences. Trusted by over a quarter of the Fortune 100, half of the Fortune 10, and top global media companies, we help safeguard digital landscapes. Our Cosmos platform, honored as Best Emerging Technology by SC Media, exemplifies our commitment to innovation.  

Joining Bishop Fox means collaborating with a curious and dedicated team. You'll tackle complex challenges for some of the world's most recognized organizations, securing their networks against real-world threats. With nearly 20 years of industry contributions—including 16 open-source tools and 50 security advisories published in the past five years—we're committed to making the digital world safer. 

We’re looking for talented, experienced professional hackers to help us secure some of the world’s most complex software and sophisticated technologies. You’ll be working alongside our US and internationally-based teams supporting clients across multiple industries.   

Responsibilities

Bishop Fox is looking for experienced contract penetration testers with a primary focus in web application security and strong secondary expertise in cloud, mobile, source code, network, or AI/LLM security.

You’ll work on a range of projects, from short-term assessments to longer-term program engagements with well-established clients. In this role, you’ll identify vulnerabilities, validate risk, develop creative solutions, and clearly communicate findings and remediation guidance to both technical and executive stakeholders. As a trusted advisor, you’ll help clients understand risk and make informed security decisions. 

Experience

5+ years of experience planning, conducting, and managing web application penetration tests
Deep understanding of application security fundamentals, OWASP Top 10, common vulnerabilities, and secure development best practices
Experience assessing vulnerabilities and developing exploits across diverse targets
Strong understanding of system and network security, authentication protocols, security protocols, and applied cryptography
Ability to communicate complex technical findings clearly and provide practical remediation guidance to technical and executive audiences

Preferred Experience

Deep experience in at least one of the following:

Cloud Security - Experience assessing AWS cloud environments, including technologies such as IAM, EC2, VPC, EBS, S3, CloudWatch, and Lambda.

Mobile Application Security - Experience testing iOS and/or Android applications, including mobile application architecture, API communication, data storage, authentication flows, and common mobile security vulnerabilities.

Source Assisted Application Assessments: Experience evaluating applications across multiple layers, including source code, APIs, infrastructure, and integrations. Strong proficiency in Golang is highly preferred, along with familiarity in languages such as Python, Ruby, PowerShell, Java, and JavaScript.

Network Security - Experience with network and system exploitation, including modern tactics, techniques, and procedures such as C2 frameworks, EDR bypass, privilege escalation, password cracking, and lateral movement.

AI/LLM Security -Experience assessing non-deterministic security controls.

Employment Sponsorship

This engagement is for independent contractors (1099) and is not eligible for any form of employment sponsorship. Applicants must be legally authorized to work in the United States without requiring visa sponsorship now or in the future. Applicants must be located in the United States.

All new hires must pass a background check as a condition of employment.

Bishop Fox is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic protected by applicable federal, state, or local law.

Originally posted on Himalayas

Job Description

Contract Penetration Tester

Responsibilities

Experience

5+ years of experience planning, conducting, and managing web application penetration tests
Deep understanding of application security fundamentals, OWASP Top 10, common vulnerabilities, and secure development best practices
Experience assessing vulnerabilities and developing exploits across diverse targets
Strong understanding of system and network security, authentication protocols, security protocols, and applied cryptography
Ability to communicate complex technical findings clearly and provide practical remediation guidance to technical and executive audiences

Preferred Experience

Deep experience in at least one of the following:

Cloud Security - Experience assessing AWS cloud environments, including technologies such as IAM, EC2, VPC, EBS, S3, CloudWatch, and Lambda.

Mobile Application Security - Experience testing iOS and/or Android applications, including mobile application architecture, API communication, data storage, authentication flows, and common mobile security vulnerabilities.

Source Assisted Application Assessments: Experience evaluating applications across multiple layers, including source code, APIs, infrastructure, and integrations. Strong proficiency in Golang is highly preferred, along with familiarity in languages such as Python, Ruby, PowerShell, Java, and JavaScript.

Network Security - Experience with network and system exploitation, including modern tactics, techniques, and procedures such as C2 frameworks, EDR bypass, privilege escalation, password cracking, and lateral movement.

AI/LLM Security -Experience assessing non-deterministic security controls.

Employment Sponsorship

All new hires must pass a background check as a condition of employment.

Originally posted on Himalayas

Job Description

Contract Penetration Tester

Responsibilities

Experience

5+ years of experience planning, conducting, and managing web application penetration tests
Deep understanding of application security fundamentals, OWASP Top 10, common vulnerabilities, and secure development best practices
Experience assessing vulnerabilities and developing exploits across diverse targets
Strong understanding of system and network security, authentication protocols, security protocols, and applied cryptography
Ability to communicate complex technical findings clearly and provide practical remediation guidance to technical and executive audiences

Preferred Experience

Deep experience in at least one of the following:

Cloud Security - Experience assessing AWS cloud environments, including technologies such as IAM, EC2, VPC, EBS, S3, CloudWatch, and Lambda.

Mobile Application Security - Experience testing iOS and/or Android applications, including mobile application architecture, API communication, data storage, authentication flows, and common mobile security vulnerabilities.

Source Assisted Application Assessments: Experience evaluating applications across multiple layers, including source code, APIs, infrastructure, and integrations. Strong proficiency in Golang is highly preferred, along with familiarity in languages such as Python, Ruby, PowerShell, Java, and JavaScript.

Network Security - Experience with network and system exploitation, including modern tactics, techniques, and procedures such as C2 frameworks, EDR bypass, privilege escalation, password cracking, and lateral movement.

AI/LLM Security -Experience assessing non-deterministic security controls.

Employment Sponsorship

All new hires must pass a background check as a condition of employment.

Originally posted on Himalayas

Job Description

Contract Penetration Tester

Responsibilities

Experience

5+ years of experience planning, conducting, and managing web application penetration tests
Deep understanding of application security fundamentals, OWASP Top 10, common vulnerabilities, and secure development best practices
Experience assessing vulnerabilities and developing exploits across diverse targets
Strong understanding of system and network security, authentication protocols, security protocols, and applied cryptography
Ability to communicate complex technical findings clearly and provide practical remediation guidance to technical and executive audiences

Preferred Experience

Deep experience in at least one of the following:

Cloud Security - Experience assessing AWS cloud environments, including technologies such as IAM, EC2, VPC, EBS, S3, CloudWatch, and Lambda.

Mobile Application Security - Experience testing iOS and/or Android applications, including mobile application architecture, API communication, data storage, authentication flows, and common mobile security vulnerabilities.

Source Assisted Application Assessments: Experience evaluating applications across multiple layers, including source code, APIs, infrastructure, and integrations. Strong proficiency in Golang is highly preferred, along with familiarity in languages such as Python, Ruby, PowerShell, Java, and JavaScript.

Network Security - Experience with network and system exploitation, including modern tactics, techniques, and procedures such as C2 frameworks, EDR bypass, privilege escalation, password cracking, and lateral movement.

AI/LLM Security -Experience assessing non-deterministic security controls.

Employment Sponsorship

All new hires must pass a background check as a condition of employment.

Originally posted on Himalayas