Principal Security Researcher

At Mindbox we 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

What you’ll be doing

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.

What you get in return

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

Who we’re looking for

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

Principal Security Researcher

Kraków

B2B

1400-1700 PLN/MD netto + VAT

Apply for position

I will handle your recruitment

Patrycja Kachel

SUPPORT & BENEFITS

Private healthcare

Fast access to doctors and medical tests.

Mindbox fully covers the individual package. You can extend the coverage to your partner and family on preferential terms. A wide network of medical providers and clear rules for everyday use.

Multisport

Energy that pays off.

We cover 50% of the card cost. You get access to thousands of sports facilities across Poland, plus a convenient mobile app. Additional cards for family members are available.

Training & development

Practical support for your career growth.

We co‑fund courses, certifications and conferences under a clear Training Policy. You also get access to a library of recorded webinars and trainings – available whenever you need them.

Eyewear or contact lenses co‑funding

Clear vision means comfortable work.

Up to PLN 500 every two years, with an additional PLN 300 available in justified cases. Simple reimbursement, regardless of your form of cooperation.

Group life insurance

Real protection from day one.

Option I is fully funded by Mindbox, Option II is co‑funded. You can include your partner and adult children, with coverage that also applies to treatment and hospitalisation abroad.

Ongoing support from the Talent Network Development

You’re not on your own in a project.

Regular contact, quick response and a partnership‑based approach. You focus on your work — we help take care of the rest.

Regular integration meet‑ups

Relationships that work beyond the project.

Cyclical meet‑ups for contractors in major cities across Poland. A space to talk, exchange experience and stay in real contact with the Mindbox team.

Annual company‑wide integration

One event. The whole community.

A two‑day company gathering with accommodation, transport and a full activity programme. Time to connect teams from across Poland and build shared experiences.