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September 5, 2026
Principal Security Researcher
Senior • On-site
Krakow, MA, Poland
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Description
Deliver security research projects for critical services, ensuring the design, quality, and implementation of controls do not expose the bank to significant risk.
Responsibilities
- Identify previously unknown vulnerabilities and new attack techniques.
- Proactively reduce cybersecurity risk and improve the security risk posture within business risk appetite.
- Provide subject matter expertise and guidance to stakeholders across global businesses and functions.
- Engage with programmes critical to the bank and with specialist technology functions, including Cybersecurity Technology, Cybersecurity Operations, and Security Architecture.
- Understand and analyse the financial-services security and evolving threat landscape.
- Work with business and function stakeholders, cybersecurity leads, heads of cybersecurity functions, and control owners to achieve CROS objectives.
- Drive performance, compliance, and security while adhering to procedures, policies, and operational controls.
- Establish necessary operational controls within tools and systems used.
- Develop tools and process automation to enhance security assessment, including experimenting with AI for Security to address complex cyber assessment and testing problems.
- Leverage AI to enhance security research, particularly vulnerability discovery and validation.
- Build productive client-facing relationships across the bank and demonstrate leadership in managing stakeholders and staff.
- Identify project opportunities, apply innovative security approaches, and address customer and stakeholder needs.
Requirements
- Experience leading highly sensitive projects.
- 0-day discovery and vulnerability disclosure.
- Exploit development.
- Mobile security.
- System architecture.
- Software development.
- Source code review.
- Hardware hacking.
- Wireless technology.
- Reverse engineering.
- Penetration testing.
- AI LLM / GenAI security assessments (Security for AI).
- AI in the discovery and validation of 0-days (AI for Security).
Offer
- Full-time employment contract.
- Hybrid work in Kraków, with 6 office visits per month.
- Stable, long-term cooperation.
- Well-defined career path.
- Opportunity to relocate and work in different branches.
- Opportunity to engage in a subsequent project after project completion.
- Cooperation also available on a B2B or contract-of-mandate basis.
Benefits
- Medicover medical care.
- Medicover dental care.
- Medicover Benefits platform.
- Medicover Sport card.
- Referral program.
- Layette for a newborn employee’s child.
- Group life insurance.
- Pension scheme.
- Access to professional certifications with technology partners, such as Google and ISTQB.
- Access to relevant industry events.
- Access to the Knowledge Sharing Program.
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