October 9, 2026
Penetration Tester
Senior • Remote
Wrocław, Pl-Ds, Poland
Quick Facts
Role: Penetration Tester
Description
Conduct penetration tests of web applications, systems, networks, and mobile applications, then analyze discovered vulnerabilities and prepare remediation recommendations. The role focuses on strong network and system technology knowledge and on producing high-quality analytical reports. You will also provide security guidance for systems, architecture, and source code, and coordinate remediation with development and IT administration teams.
Responsibilities
Perform penetration tests of web applications, infrastructure, and mobile applications
Identify vulnerabilities and weaknesses in systems and applications
Analyze penetration testing results
Create detailed reports describing vulnerabilities, their severity/criticality, and recommended remediation actions
Provide security advice related to systems, architecture, and source code
Collaborate with development and system administration teams to implement fixes and recommendations
Support the organization in implementing security best practices and security methodologies
Document findings and present them to IT teams and management
Perform risk assessments and recommend appropriate mitigation measures
Requirements
Minimum 3 years of experience in penetration testing of web applications, systems, and networks
Good understanding of cryptography concepts and applied cryptography (e.g., SSL, AES)
Very good knowledge of at least one scripting language: Perl, Python, Ruby, JavaScript, or Shell
Very good knowledge of at least one high-level programming language: Java, C#, Go, C, or C++
Knowledge of OWASP Top 10 and SANS Top 25
Knowledge of exploit development techniques, vulnerability research, and vulnerability reporting
Knowledge of OSI stack and TCP, computer architecture, and network protocols
Knowledge of Windows/Linux operating system architecture
Knowledge of LAN, WAN, VPN, proxy, firewall, and IDS/IPS technologies
Experience in network traffic analysis and protocol diagnostics using Wireshark, tcpdump, Burp Suite, ZAP, or MITMproxy
Strong analytical and reporting skills
Benefits
Multisport card
Private medical care
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