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Pentester WebAPP and API

Link GroupRemote; Poland; Poland; Remote

About this role

Pentester WebAPP and API Link Group Daily tasks: - Advanced Technical Testing: Personally lead and execute end-to-end penetration tests across web applications, APIs, mobile apps (iOS/Android), cloud environments, and internal/external networks. - Deep Active Directory Assessments: Perform sophisticated AD security testing, including privilege escalation, lateral movement, delegation/ACL abuse, and attack path analysis.

- Exploit Development: Write custom scripts, tooling, and proof-of-concept (PoC) exploits using Python, PowerShell, and/or Bash. - End-to-End Engagement Management: Own the lifecycle of assignments—from initial scoping and effort estimation to final report delivery and remediation retesting. - Quality Assurance & Pre-Sales: Review and QA technical findings/reports from the team, and provide technical input during scoping calls and proposal creation.

- Client & Stakeholder Communication: Act as the primary technical point of contact, translating complex technical risks into clear insights for both devs and non-technical executives. Musts: Security, Cybersecurity, Web applications, Active Directory, Offensive Security Certified Professional Experience: ~5+ years of hands-on offensive security experience , ideally within a cybersecurity consultancy or multi-client delivery environment.

Core Depth: Proven expertise in at least three domains: web applications, network, mobile, or Active Directory testing. Tooling Infrastructure: Mastery of industry-standard tools ( Burp Suite, Nmap, Metasploit, BloodHound, Impacket, CrackMapExec/NetExec, Cobalt Strike , Frida, etc.). Certifications (Minimum of ONE required): OSCP (Offensive Security Certified Professional) CRTP / CRTO (Active Directory/Red Team) CREST CRT / CPSA (CCT App or Infra strongly preferred) Soft Skills: Exceptional report-writing skills and fluent professional English.

Highly Desirable / Nice to Have Advanced certifications ( OSEP, OSWE, OSED, CRTE, SANS GXPN/GWAPT , or Cloud offensive certs). Prior experience within a Big 4 firm or an established boutique security consultancy. Hands-on exposure to AWS/Azure/GCP cloud environments and Kubernetes/containers. Active community presence: Published research, CVEs, open-source tooling contributions, conference talks, or top CTF achievements.

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