# Cobalt Core Pentester - US Remote-Only

**Company:** [Cobalt.io](https://hotfix.jobs/companies/cobalt-io)
**Location:** Remote
**Role:** Security Engineering
**Skills:** Penetration Testing, Owasp Top 10, Web Application Security, Api Testing, Network Penetration Testing, Mobile App Testing, Ios Security, Android Security, Vulnerability Assessment, Manual Testing
**Posted:** 2026-02-18

> Conduct manual penetration testing on web apps, APIs, networks, and iOS/Android mobile apps as part of a pentest team. Document findings, validate vulnerabilities, and focus on OWASP Top 10 for US-resident freelancers.

## Job Description

## Responsibilities
- Perform manual penetration testing of web applications, APIs, internal and external networks, iOS and Android mobile applications
- Work as a member of a pentest team, collaborating and engaging directly with clients
- Document in detail the results of assessments, audits, tests, and verification activities
- Perform manual validation of vulnerabilities
- Perform mobile and web app pentesting for OWASP top 10 vulnerabilities

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**Apply:** https://hotfix.jobs/jobs/2dc32fed-f34b-45c2-8c08-f4a31b5c357a
**Canonical:** https://hotfix.jobs/jobs/2dc32fed-f34b-45c2-8c08-f4a31b5c357a