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September 18, 2026
Penetration Tester
Senior • On-site
Warsaw, Maz, Poland
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Quick Facts
Role: Penetration Tester
Description
You will independently conduct penetration tests for IT infrastructure, web applications, mobile applications, and cloud environments. The work includes planning test scope, performing recon and attack-surface analysis, exploiting and validating vulnerabilities safely, and executing social engineering/phishing when relevant. You will produce risk-rated reports and present findings to both technical and business stakeholders.
Responsibilities
- Plan penetration test scope and choose methods/tools based on the project
- Perform reconnaissance, identify attack surface, and analyze environment architecture
- Identify, confirm, and safely use security vulnerabilities
- Conduct social engineering and phishing tests
- Test web application security using OWASP Web Security Testing Guide and OWASP ASVS
- Test Active Directory environments and verify privilege escalation and lateral movement
- Validate the effectiveness of implemented controls and perform retests after fixes
- Create technical and management reports with vulnerability descriptions, risk assessment (CVSS), and remediation recommendations
- Present results to clients and participate in summary meetings
- Collaborate with SOC, Incident Response, Vulnerability Management teams, and system administrators
- Improve penetration testing methodologies, automate selected tasks, and build supporting tools
- Monitor new attack techniques, vulnerabilities, and attacker tooling and incorporate them into testing
Requirements
- Minimum 2 years of penetration testing experience across at least two areas: IT infrastructure, web applications, cloud environments
- Experience with Black Box, Grey Box, and White Box testing
- Knowledge of security testing methodologies/standards: OWASP Testing Guide (WSTG), OWASP ASVS, PTES, NIST SP 800-115, MITRE ATT&CK
- Strong knowledge of Windows and Linux
- Knowledge of network protocols and security topics: TCP/IP, DNS, HTTP/HTTPS, SMB, RDP, LDAP, Kerberos, NTLM, SNMP, VPN
- Ability to manually identify, exploit, and verify vulnerabilities and map them to realistic attack scenarios
- Practical experience with Burp Suite Professional, Nmap, Nessus, Metasploit, Impacket, NetExec (CrackMapExec), ffuf, sqlmap, Responder, Wireshark (or equivalents)
- Ability to report to technical and business audiences with CVSS risk scoring and remediation recommendations
- Ability to lead client meetings and present results to technical and business stakeholders
- English level enabling free use of technical documentation (at least B2)
- Self-sufficiency, responsibility, curiosity, and strong analytical skills
Benefits
- Private medical care and group life insurance
- Training and development programs, funding for professional qualification improvement, and advancement opportunities
- Multisport card
- Subsidy for rest/holidays
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