Senior Penetration Tester

Senior Penetration Tester 

Business Area: Cybersecurity Research & Offensive Security
Work Model: Hybrid – 6 days per month from the office in Kraków (preferred) or Warsaw
Contract Type: B2B

Role Overview

We are looking for an experienced Senior Penetration Tester to join a global Cybersecurity team. In this role, you will lead and execute advanced security assessments across web, mobile, infrastructure, and API environments, ensuring high-quality delivery and clear risk articulation to both technical and non-technical stakeholders.

You will act as a subject matter expert (SME), driving penetration testing initiatives, mentoring junior team members, and contributing to the continuous improvement of cybersecurity standards, processes, and tooling.

Key Responsibilities

• Lead and deliver end-to-end penetration tests across:

  • Mobile applications (iOS & Android)
  • Web applications and APIs
  • Infrastructure and network environments

• Perform manual penetration testing, source code reviews, and configuration assessments

• Clearly document findings, including root cause analysis and business risk impact

• Design and demonstrate proof-of-concept exploits when required

• Collaborate with DevOps and engineering teams to:

  • Support remediation efforts
  • Improve secure development practices
  • Automate repetitive security testing tasks

• Assess product release risk and identify potential misuse scenarios

• Track remediation activities and support risk acceptance processes

• Support incident response activities when required

• Evaluate new security testing technologies and recommend improvements

• Monitor security industry developments and emerging threats

• Contribute to process enhancements and quality improvements

• Mentor junior team members and support knowledge sharing

What We Offer

• B2B contract
• Hybrid work model (6 days/month in office – Kraków preferred or Warsaw)
• Private medical care (LuxMed)
• MyBenefit cafeteria platform
• Dedicated support from Contractor Care team