Freelance Security Researcher - 100% remote

Who we are

Greenbone stands for cybersecurity with conviction.

As a global company, we develop open-source solutions for vulnerability assessment and vulnerability management, helping organisations proactively protect their digital infrastructure - before risks turn into real threats.

We are looking for an experienced Freelance Security Researcher to support us on challenging projects in vulnerability research, detection, and automation.

Your mission

As a Freelance Security Researcher, you will work independently on technically challenging security research and development tasks. Your responsibilities will include:

• Researching and developing code for complex, security-related objectives.
• Independently analyzing vulnerabilities and building systems for their automated detection.
• Designing and implementing technologies for future vulnerability analysis and the detection of new attack vectors.
• Re-implementing publicly available exploits in alternative programming languages.
• Developing detection and testing methods using techniques such as banner grabbing, authenticated protocols, and targeted product testing.
• Working confidently with a diverse range of security tools, operating systems, Git, and network protocols.

What you offer

• Proven expertise in cybersecurity, gained through several years of hands-on experience across different roles, projects, or research activities.
• Strong coding skills-whether in scripting or compiled languages-with software development being a central part of your daily work.
• A genuine passion for coding, security research, vulnerability analysis, and staying ahead of emerging threats and attack techniques.
• Excellent written English communication skills.
• Motivation to shape and improve software, tooling, and processes for vulnerability detection and automation.
• An independent, structured, and proactive working style, including the ability to quickly understand, work with, and improve existing codebases.

Why us

This is a freelance engagement, not a permanent employment position. We are specifically looking for an individual independent contractor who can collaborate directly with our team and take ownership of assigned research and development tasks.

Please note: No agencies, consultancies, staffing providers, outsourcing companies, or other intermediaries. We will only consider applications from freelancers who will personally perform the work.

When applying, please include your hourly rate, maximum availability in hours per week, and earliest possible start date.