Offensive Security Engineer I
MollieLisbon, Portugal
Posted January 16, 2026
Full Time
About the Company
Mollie is one of Europe's fastest-growing fintechs, with 900+ employees across 12+ locations. They're on a mission to make payments and money management effortless for every business in Europe.
Job Description
Mollie is looking for an Offensive Security Engineer to help protect their platform and customers from vulnerabilities. The role involves proactively identifying and validating vulnerabilities, collaborating with teams, and driving issues from discovery to closure. As an Offensive Security Engineer, you will have the freedom to create and the trust to deliver.
Requirements
- 2+ years of hands-on offensive security experience (penetration testing, ethical hacking, product security engineering)
- Certifications such as OSCP, OSCE, or similar are highly preferred.
- Practical experience testing modern web applications and APIs (auth, authorization, business logic, data handling)
- Familiarity with common testing tools and techniques (e.g., Burp Suite and similar tooling)
- Basic scripting/automation skills (Python, Bash, or similar) to speed up repeatable work
- Understanding of cloud environments and common attack vectors (GCP concepts are all welcome)
- Ability to write clear, actionable findings and communicate risk to both technical and non-technical stakeholders
- A collaborative mindset: you enjoy partnering with teams to get issues fixed and verified
Benefits
- Growth opportunities
- Regular feedback and performance reviews
- Fair and transparent salary reviews
- Actively hire from within
