Offensive Security Engineer

Hey there, Cybersecurity Enthusiasts! At Factorial, we’re on the hunt for a skilled Offensive Security Engineer to join our Security Team. We need your expertise to proactively hunt for vulnerabilities and strengthen our defenses against cyber threats. If you have a passion for ethical hacking and want to make an impact in a dynamic tech environment, we’d love to hear from you!

The Mission :

Perform proactive penetration testing, identifying and exploiting vulnerabilities in our applications and systems.

Reproduce and validate vulnerability reports submitted by third parties, like our bug bounty program.

Collaborate with development teams to remediate security findings and enhance secure coding practices.

Contribute to the development of our security tools, automations and infrastructure.

Stay up-to-date with the latest security research, threats, and attack techniques.

Your Arsenal :

You have 3+ years of professional experience in Penetration Testing. Web Application Penetration Testing experience is mandatory.

You hold a degree in Engineering or Computer Science and have strong knowledge of web applications, databases, network protocols, and operating systems.

You possess strong knowledge in cybersecurity fundamentals, CVSS, testing methodologies and tooling.

You are fluent with scripting or programming languages used in security testing (e.g., Python, Bash).

You have excellent problem‑solving skills and a relentless pursuit of uncovering security weaknesses.

Certifications like BSCP or eWPTX are highly regarded but not mandatory.

Experience with Ruby / Ruby on Rails applications is highly regarded, but nor mandatory.

Fluency in English is required.

Why Join Us?

We offer a high‑growth environment where your work will directly impact the company’s success.

You’ll be part of a team that values innovation, learning, and collaboration.

You’ll have the opportunity to attend industry conferences and training events to further your skills.

If you’re ready to take on this challenge at Factorial, apply now! We can’t wait to see what you’ll bring to our team.

Compensation The salary for this position is 40.000€ + 7% variable based on performance paid quarterly + ESOP plan.

How We Work At Factorial, we believe the best products are built when people come together – in person – to collaborate, challenge ideas, and move fast. That’s why our Engineering Team follows an office‑first, flexible approach.

We work on‑site several days a week (80%), using that time to connect, align, and innovate as a team. However, we also understand the importance of focus and flexibility, so we support remote work when it makes sense (20%) – whether for deep work, personal needs, or just a change of scenery.

This balance helps us stay agile, creative, and closely connected—while giving everyone the space to do their best work.

Perks of being part of our team

High growth, multicultural and friendly environment

Continuous training and learning based on your needs

Alan private health insurance

Healthy life with Gympass (Gyms, pools, outdoor classes)

Save expenses with Cobee

Language classes with Yolk Academy

Get the most out of your salary with Payflow

And when at the office...

Breakfast in the office and organic fruit

Nora and Apeteat discounts

Pet Friendly

Join Factorial, where people grow Diversity is part of our culture, we have more than 43 nationalities in our teams and we are infused in an inclusive environment for all employees and candidates. Please feel free to apply with the way it suits you better! (blind resume, identity pronouns, cover letter, etc). We do not discriminate on any aspect, in fact; Factorial encourages everyone to join us!

About Factorial Factorial is an innovative Business Management Software solution designed to streamline company processes for small and medium‑size enterprises. Founded in 2016, our mission is to help companies automate workflows, centralize people data, and make better business decisions. With customers across over 60 countries worldwide, we’ve built a diverse team that’s driving change in the business‑management tech space. Join us as we continue our rapid growth journey!

Our Values

We own it : We take responsibility for every project. We make decisions, not excuses.

We learn and teach : We’re dedicated to learning something new every day and, above all, share it.

We partner : Every decision is a team decision. We trust each other.

We grow fast : We act fast. We think that the worst mistake is not learning from them.

Wanna learn more about us? Check our website!

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