Offensive Security Engineer: Red Team & Tooling

Stripe; Dublin; On-site; EUR 112,000 - 168,000; Full time

Job summary

Stripe's Proactive Threat team in Ireland works in a hybrid offensive capacity, performing penetration testing, red team engagements, and tooling development to strengthen Stripe's security posture. You will simulate real adversaries across web apps, cloud services, and internal infra, delivering high‑fidelity assessments and actionable remediation guidance.

You will design custom tooling, collaborate with blue teams, and contribute to incident response efforts while staying current with

Qualifications

• 5+ years of experience in offensive security, penetration testing, red teaming, or a related field.

Responsibilities

• Conduct comprehensive penetration tests across web applications, APIs, cloud environments (AWS/GCP/Azure), mobile applications, and internal infrastructure.
• Plan and execute red team engagements that emulate threat actors targeting financial services.
• Perform assumed-breach and objective-based assessments to test detection and response capabilities.
• Partner with detection engineering, threat intelligence, and incident response teams to validate security controls.
• Contribute adversary tradecraft insights to inform detection rule development and incident response playbooks.
• Support incident investigations with offensive expertise, log analysis, and root cause analysis.
• Design, develop, and maintain custom offensive tools and automation frameworks.
• Build internal platforms and workflows for scalable offensive operations.
• Automate repetitive testing tasks, payload generation, and reporting workflows.
• Produce clear, actionable reports communicating findings and risk to stakeholders.
• Lead offensive security projects end-to-end and mentor junior team members.
• Stay current with threats and techniques; share research internally.
• Champion engineering best practices within the team.

Skills

Offensive security

Penetration testing

Red teaming

Python/Go

Web app security

Cloud platforms

Offensive tooling

MITRE ATT&CK

Communication skills

Threat modeling

Tools

Burp Suite

Cobalt Strike

Mythic

Sliver

BloodHound

Job description

Stripe's Proactive Threat team in Ireland works in a hybrid offensive capacity, performing penetration testing, red team engagements, and tooling development to strengthen Stripe's security posture. You will simulate real adversaries across web apps, cloud services, and internal infra, delivering high‑fidelity assessments and actionable remediation guidance.

You will design custom tooling, collaborate with blue teams, and contribute to incident response efforts while staying current with