Senior Offensive Security Engineer (Contractor) – Web/API

Applaudo; Chile; On-site; CLP 6,000,000 - 12,000,000; Part time

Job summary

Applaudo is seeking an experienced offensive security professional to perform controlled production testing of web apps, APIs, and services protected by enterprise SSO. You will document reproducible evidence, follow strict rules of engagement, and produce regulator-ready reporting with CVSS scoring.

The contractor role spans an initial two-month period with potential extension, requiring strong English communication and the ability to work with a U.S.-based security team.

Qualifications

• 5+ years of hands-on penetration testing experience.
• 3+ years testing web apps and APIs in production.
• Manual testing following OWASP WSTG and OWASP Top 10.
• API security testing following the OWASP API Security Top 10 including BOLA/IDOR and broken function level authorization.

Responsibilities

• Perform outside unauthenticated testing of in scope web apps, REST and SOAP APIs, an API gateway and internet exposed hosts.
• Perform inside testing from client provided accounts, covering cross role and cross account authorization, privilege escalation and access beyond the assigned role.
• Discover API specifications such as OpenAPI, WSDL and Postman collections for REST and SOAP services before testing when required.
• Base every finding on an exploitation attempt and record its result, listing scan only items separately as untested.
• Test all authorized in scope assets, or document the reason for exclusion when client side dependencies are not met.
• Execute all testing without causing service disruption or data loss, escalating stop conditions within one hour.
• Score findings using CVSS v3.1 and document reproducible evidence suitable for regulatory review.
• Contribute to the draft report, the final report and the signed attestation letter covering the outside, inside application and inside identity perspectives.
• Support the revalidation report delivered within 60 days of the final report.
• Report weekly status in English and participate in working sessions with the client security team.

Skills

Penetration testing

Web apps testing

API security testing

Burp Suite Pro

SSO testing

OpenID Connect/OAuth

WSTG OWASP

Regulatory reporting

Education

Bachelor’s degree or equivalent

Tools

Burp Suite Pro extensions

SoapUI

Nmap

Amass

httpx

subfinder

Job description

Applaudo is seeking an experienced offensive security professional to perform controlled production testing of web apps, APIs, and services protected by enterprise SSO. You will document reproducible evidence, follow strict rules of engagement, and produce regulator-ready reporting with CVSS scoring.

The contractor role spans an initial two-month period with potential extension, requiring strong English communication and the ability to work with a U.S.-based security team.