Lead Web Application Penetration Tester- Onsite

Calance; Charlotte (NC); On-site; USD 110,000 - 150,000; Full time

Job summary

Calance seeks an experienced Lead Web Application Penetration Tester for an onsite, one-year contract. The role focuses on identifying vulnerabilities in modern web apps and APIs, emphasizing logic flaws, auth controls, and API endpoints. You will combine manual testing with automated tools like Burp Suite to uncover high-impact risks.

Strong reporting, remediation guidance, and stakeholder communication are essential as you lead scoping through delivery. Relevant certifications are preferred.

Qualifications

• Strong experience in web application penetration testing.
• Proficient with Burp Suite and related offensive testing tools.
• Solid understanding of the OWASP Top 10 and OWASP API Security Top 10.
• Experience testing REST and/or GraphQL APIs.
• Excellent report writing, remediation advisory, and communication skills.
• Ability to work independently and lead assessments from scoping through delivery.
• Knowledge of SAST, DAST, SCA, and API security tooling.
• Certifications such as OSCP, OSEP, GWAPT, or equivalent.

Responsibilities

• Lead and execute advanced penetration tests against web applications, APIs, and related services.
• Test complex business workflows such as user onboarding, checkout flows, and account recovery.
• Perform manual and automated testing using Burp Suite and OWASP tools.
• Provide remediation advisory to owners, developers, and security stakeholders.

Skills

Web app pentesting

Manual testing

API security

Report writing

Leadership

Education

OSCP

OSEP

GWAPT

Tools

Burp Suite

OWASP testing tools

Job description

We have a contract opportunity with one of our major clients. They are looking for a Lead Web Application Penetration Tester- Onsite for an important project.

Duration: Contract : 1 year

Job Description:

Required Skills:

Strong experience in web application penetration testing

Demonstrated proficiency with Burp Suite and related offensive testing tools.

Solid understanding of the OWASP Top 10 and OWASP API Security Top 10.

Experience testing REST and/or GraphQL APIs.

Excellent report writing, remediation advisory, and communication skills.

Ability to work independently and lead assessments from scoping through delivery.

Knowledge of SAST, DAST, SCA, and API security tooling.

Relevant certifications such as OSCP, OSEP, GWAPT, or equivalent.

Description:

Job Summary:

Advanced Web Application Penetration Tester

Role Summary

We are seeking an experienced Advanced Web Application Penetration Tester to lead security assessments of modern web applications and APIs. This role will focus on uncovering vulnerabilities in application logic, authentication and authorization controls, API endpoints, session handling, and other attack paths commonly targeted in real-world engagements. The ideal candidate is highly skilled in manual testing, has deep experience with tools such as Burp Suite and other OWASP-aligned testing utilities, and can combine automated and human-led techniques to identify high-impact risks

Key Responsibilities

Lead and execute advanced penetration tests against web applications, APIs, and related services.

Test complex business workflows such as user onboarding, checkout/cart flows, account recovery, role escalation, payment actions, and transaction handling.

Perform manual and automated testing using Burp Suite, OWASP tools, and other security testing utilities.

Analyze and attack API security issues, including object-level authorization, function-level authorization, mass assignment, excessive data exposure, and broken object references.

Identify weaknesses in rate limiting, input validation, error handling, file upload processing, and trust boundaries.

Perform reconnaissance and application mapping to identify endpoints, parameters, hidden functionality, and exposed surfaces.

Enumerate and test user roles, permissions, and privilege boundaries.

Probe for broken session management, token handling issues, and weak logout / session invalidation behavior.

Test input handling for client-side and server-side validation issues, including edge cases and error-based disclosures.

Provide remediation advisory to application owners, developers, and security stakeholders on how to address identified findings.

Required Qualifications:

Strong experience in web application penetration testing

Demonstrated proficiency with Burp Suite and related offensive testing tools.

Solid understanding of the OWASP Top 10 and OWASP API Security Top 10.

Experience testing REST and/or GraphQL APIs.

Excellent report writing, remediation advisory, and communication skills.

Ability to work independently and lead assessments from scoping through delivery.

Knowledge of SAST, DAST, SCA, and API security tooling.

Relevant certifications such as OSCP, OSEP, GWAPT, or equivalent.