Senior Penetration Tester – Red Team, Cloud & Apps

Reperio Human Capital Ltd; Dublin; On-site; EUR 90,000 - 120,000; Full time

Job summary

Reperio Human Capital Ltd is seeking an experienced Senior Penetration Tester to perform advanced manual assessments across web, mobile, infrastructure, cloud, and Active Directory.

You will join a client-facing team delivering clear technical reports and executive summaries, mentor junior testers, and help build internal tools and methodologies. Occasionally you will support pre-sales and work onsite with customers to translate security findings into practical mitigations.

Qualifications

• 5+ years of professional penetration testing experience.
• Manual testing skills beyond automated tooling.
• Strong Windows, Unix and networking security knowledge.
• Scripting or development experience (Python, C#, Java, PHP).
• Good knowledge of cloud environments.
• Certifications such as OSCP, OSEP, CRTO, CREST or equivalent.
• Excellent communication and client-facing confidence.

Responsibilities

• Carry out advanced manual penetration tests across web, mobile, infrastructure, cloud and Active Directory
• Run Red Team and assumed-breach engagements, as part of a team or on your own
• Review architecture and source code for security weaknesses
• Write clear technical reports and executive summaries, and present findings to clients
• Mentor junior and mid-level testers, and help build internal tools and methodologies
• Support pre-sales and occasionally work onsite with customers

Skills

Penetration testing

Manual testing

Networking security

Cloud environments

Scripting / development

Client communication

Mentoring

Tools

Python

C#

Java

PHP

Job description

Reperio Human Capital Ltd is seeking an experienced Senior Penetration Tester to perform advanced manual assessments across web, mobile, infrastructure, cloud, and Active Directory.

You will join a client-facing team delivering clear technical reports and executive summaries, mentor junior testers, and help build internal tools and methodologies. Occasionally you will support pre-sales and work onsite with customers to translate security findings into practical mitigations.