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September 5, 2026

Principal Security Researcher

Senior • On-site

Krakow, MA, Poland

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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