Hybrid Red Team Engineer

at Five9

• Job title: Red Team Engineer
• Job type: Full Time
• Experience level: Mid level, Senior
• Salary: Not specified
• Degree requirement: No Education Requirement
• Location requirements: Hybrid, Porto, Portugal

About the role

• Red Team Engineer focusing on cybersecurity and offensive operations at Five9. Building a world-class cybersecurity operation and reinforcing the Red Team's capabilities.

Responsibilities

• Plan and run full Red Team engagements: recon, initial access, post-ex, lateral movement, impact.
• Build and maintain clean, compartmentalized Red Team infrastructure with flawless OPSEC.
• Work with the Blue Team in Purple Team exercises to improve detections and response.
• Identify weaknesses that actually matter and translate them into clear, actionable findings.
• Develop and refine tradecraft, tooling, and adversary emulation techniques.
• Spend meaningful time on research and experimentation.

Requirements

• Strong offensive security experience and the ability to think and operate like an attacker.
• Comfort running operations independently from start to finish.
• Solid understanding of how Red Team results feed into detection engineering and overall security posture.
• Skilled with post-exploitation tooling, C2 frameworks, evasion techniques, and operational security.
• Experience working with Blue Teams or doing Purple Teaming.
• Strong technical writing when it’s time to deliver findings.

Benefits

• Five9 Shares
• Bonus Scheme
• 10% Flexi Benefit
• Meal Allowance
• Medical Insurance
• Life Insurance
• 25 day Annual Leave + Public Holidays