Principal Security Researcher

At Mindboxwe connect top IT talents with technology projects for leading enterprises across Europe.

Join Our Client’s Team as a Principal Security Researcher - Drive Cybersecurity Innovation with Offensive Security

Are you passionate about discovering zero-day vulnerabilities, developing exploits, and innovating security research with AI? Our client, a global leader in financial services, is looking for a Principal Security Researcher to join its Cybersecurity Research & Offensive Security (CROS) team, playing a critical role in identifying risks and building scalable solutions to strengthen resilience against sophisticated cyber threats.

This role demands technical mastery, out-of-the-box thinking, and the ability to operate within highly sensitive projects that directly impact global security posture.

Sounds like your kind of challenge?

#LI - Hybrid: 6x/msc from the office in Kraków

Responsibilities

• Flexible cooperation model
• Hybrid work setup -6x/msc from the office in Kraków - remote days available depending on the client’s arrangements
• Collaborative team culture - work alongside experienced professionals eager to share knowledge
• Continuous development - access to training platforms and growth opportunities
• Comprehensive benefits - including Interpolska Health Care, Multisport card, Warta Insurance, and more
• High quality equipment - laptop and essential software provided

Requirements

• Lead security research projects targeting critical systems and services.
• Perform advanced 0-day vulnerability discovery, exploit development, reverse engineering, and fuzzing.
• Analyze and interpret the evolving threat landscape, delivering actionable insights.
• Engage with cybersecurity leads, technology functions, and global business teams to ensure risk reduction.
• Drive automation, tooling, and AI-driven innovation (e.g., applying GenAI, LLMs, and AI for Security in vulnerability discovery and validation).
• Support security testing of emerging technologies, mobile platforms, wireless protocols, and hardware.
• Maintain strong collaboration with Offensive Security and Cybersecurity Engineering teams.
• Produce security research outputs and articulate business risk impact to senior stakeholders.

Note:Detailed project information will be shared during the recruitment process.

Benefits

• Proven experience in delivering highly sensitive cybersecurity research projects.
• Deep expertise in:
  • Vulnerability discovery and exploit development (0-day, vulnerability disclosure)
  • Reverse engineering, fuzzing, penetration testing, black-box and source code review
  • Software security, system architecture, and mobile security (Android, iOS)
  • Hardware hacking and wireless technology
• Strong programming background and automation experience.
• Familiarity with AI for security research, leveraging and training AI models for discovery/validation of vulnerabilities.
• Solid understanding of Linux, Windows, Android, and iOS.
• Exceptional analytical and problem-solving abilities, coupled with clear communication skills.
• Degree in Computer Science (or equivalent experience).
• Active participation in cybersecurity industry and vulnerability disclosure programs is a plus.

Preferred Certifications & Skills

• Offensive Security, CREST, or relevant advanced security certifications.
• Hands-on experience with security for AI systems, LLM security risks, and GenAI exploitation models.

Joining this project you’llbecome part of Mindbox - a tech-driven company where consulting, engineering, and talent meet to build meaningful digital solutions. We’llback you up every step of the way, accelerate your development, and ensure your skills make a difference.