Horizonte Business Capital, a Mexican company specializing in Human Resources and Information Technologies, is seeking: Penetration Testing and Security Specialist **Conversational English required** **Location:** On-site / Guadalajara **Employment type:** Full-time **Minimum experience:** 7–8 years **Job description** We are looking for a **Senior Application Security Pentester** with extensive experience in penetration testing and application security. This position requires advanced technical skills, analytical thinking, and the ability to communicate findings clearly and actionably. **Responsibilities** * Conduct penetration testing on web applications, software, web services, networks, mobile applications, and thick clients. * Carry out security activities focused on the identification and practical exploitation of vulnerabilities. * Use security tools such as Burp Suite and scripting languages. * Support the technical definition and scoping of security testing activities. * Assess and triage vulnerability data from multiple platforms and tools, both manually and through code review. * Analyze false positives and generate clear, accurate results for clients. * Provide technical advisory and consulting support for vulnerability remediation. * Contribute to developing scanning configurations and tool deployment. * Escalate risks and critical issues to the Regional Operations Manager when necessary. * Drive continuous improvement in vulnerability services and organizational risk reduction. * Support client-specific code and network infrastructure assessments as needed. * Periodically review and update test cases. **Requirements** * 7–8 years of experience in penetration testing. * Solid experience in Application Security. * Excellent verbal and written communication skills. * Proficiency with tools such as Burp Suite. * Knowledge of Python or other automation languages (desirable). * Knowledge of LLM. * Understanding of the CVSS scoring system. * Desirable knowledge of SAST and SCA. **Desirable certifications** * CISSP * OSCP / CPT / CEPT / CMWAPT **We offer:** * Standard office hours * 100% payroll-based employment scheme * Competitive salary commensurate with experience * Statutory benefits * Enhanced benefits (family health insurance, life insurance up to MXN 1 million, grocery vouchers, 30-day Christmas bonus, profit-sharing distribution)