Penetration Tester

Antal Poland; Kraków; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Hybrid work model

Private medical care (LuxMed)

MyBenefit platform

Contractor Care support

Job summary

Antal Poland in Kraków is seeking an experienced Senior Penetration Tester to lead and execute advanced security assessments across web, mobile, infrastructure and API environments, delivering clear risk communication to technical and non-technical stakeholders. You will act as SME, mentor junior team members, and drive continuous improvements of cybersecurity standards, processes and tooling.

This hybrid role offers 6 days per month in the office (Kraków preferred or Warsaw) under a B2B

Qualifications

• Minimum 3 years of hands-on penetration testing experience.
• Strong web and mobile application testing expertise.
• Solid knowledge of iOS and Android security models.
• Practical experience with manual and automated security testing.

Responsibilities

• Lead and deliver end-to-end penetration tests across mobile, web and API environments.
• Mentor junior team members and support knowledge sharing.
• Collaborate with DevOps to automate security testing tasks and improve processes.
• Document findings with root-cause analysis and risk impact.

Skills

Penetration testing

Team leadership

Technical communication

Independent work

Mentoring

Tools

SAST tools

DAST tools

IAST tools

Job description

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:
• 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

Required Experience & Skills

Must-have:

• Minimum 3 years of hands-on penetration testing experience
• Strong web and mobile application testing expertise
• Solid knowledge of iOS and Android security models
• Practical experience with manual and automated security testingStrong understanding of TCP/IP and networking security
• Experience with SAST, DAST, IAST tools
• Ability to explain complex security issues clearly to technical and non-technical audiences
• Ability to work independently or lead penetration testing teams

Technical Knowledge:

• Secure SDLC and DevOps environments
• Cryptography fundamentals and secure implementation practices
• Security mechanisms such as SSL/TLS, Certificate Pinning, OAuth2, JWT, SAML, RASP, biometric authentication
• Mobile security standards such as OWASP MASVS & MSTG

Nice to have:

• Code review experience (Java, Kotlin, Swift, Objective-C)
• Experience with cloud-hosted applications
• Reverse engineering or disassembly experience
• Background in secure software development

Certifications are not required but considered a plus.

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