Careers/Senior Penetration Tester

03/07

Senior Penetration Tester

Lead complex penetration tests across web applications, infrastructure, cloud environments and other applications. Identify non-obvious vulnerabilities, develop proof-of-concept exploits and produce reports that support effective remediation.

- Offensive Security
- Remote / hybrid
- Baltics
- Full-time
- from €2,200 / mo

What you’ll do

- Scope and lead black-box and white-box penetration tests covering web applications, APIs, networks, cloud environments and mobile applications.
- Develop custom exploits, scripts and tools to bypass controls and demonstrate concrete impact.
- Test manually and in depth beyond automated scanners, combining individual findings into realistic attack paths and business risk.
- Write accurate, reproducible reports and guide clients through remediation.
- Help shape testing methodology, tooling and quality standards across the team.




- Mentor junior testers and review their work.

What you bring

- At least four years of penetration-testing or offensive-security experience, including experience leading engagements.
- Strong across the OWASP Top 10, network and Active Directory attacks, and at least one cloud (Azure/AWS/GCP).
- Fluency in at least one scripting language, such as Python, Bash or Ruby, for custom tooling and automation.
- Practical experience with Burp Suite, Nmap, Metasploit, BloodHound and comparable tools.
- OSCP or equivalent skills, together with strong technical writing in English.

Additional advantages

- Source-code review
- OT/ICS, mobile or thick-client testing
- Public Burp/Ghidra extensions
- CVEs or CTF placings

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📌 Senior Penetration Tester (Stormont, Dundas and Glengarry United Counties)
🏢 OffSeq
📍 Stormont, Dundas and Glengarry United Counties