Senior Product Security Engineer; d​/f​/m

Stellenbezeichnung: Senior Product Security Engineer (d/f/m)

Personio's intelligent HR platform helps small and medium-sized organizations unlock the power of people by making complicated, time-consuming tasks simple and efficient. Our team of 1,500 Personios is building user-friendly products that delight our 15,000+ customers and their 1.5 million employees. Ready to make an impact from day one?

The Role Join us to shape the future of software in the underserved and high-impact HR technology industry. Your work will have a direct and tangible impact on customers, offering ownership and the chance to make a meaningful difference. As we prepare for significant growth, you'll face exciting challenges and have the opportunity to influence our path toward becoming one of the world's leading tech companies.
Security is a priority 're looking for an experienced Product Security Engineer to join our Product & Engineering organization and help us embed security into the core of everything we build. You'll partner directly with engineering teams to ensure our platforms are designed and built securely from the ground up, whether that means conducting in-depth security reviews, introducing security best practices, advising engineers on vulnerability mitigation or building automated tooling that scales protection across our products.
What You´ll Do

• Vulnerability Management Oversight:
  You own the end-to-end vulnerability lifecycle from discovering vulnerabilities, through its triage to tracking remediation, managing risk acceptances, and reporting on security posture across the organisation.
• Security Tooling & Automation:
  You maintain and evolve the product security toolchain (traditional and AI workflows), ensuring teams have reliable, well-integrated tools to identify and address security issues within their development environment.
• Participate in Security Operations. You respond to security incidents, provide security expertise for internal customers and use your technical prowess to find and reproduce vulnerabilities or sometimes perform small internal pentests.
• Manage External Partners:
  You manage collaboration with security vendors and external researchers (Bug Bounty) and coordinate penetration tests, to ensure focus on the right research areas and help set correct scopes for their exercises.
• Security Reviews:
  You act as a trusted security advisor to engineering teams, providing design reviews, code reviews, and ad-hoc guidance to proactively embed security into product development before issues reach production.
• Security Documentation:
  You maintain security policies and best-practice guidance ensuring development teams have clear security standards to follow. As well as documentation and metrics for your stakeholders and business leaders.
• Security
  
  Education:
  
  You drive security awareness across the engineering organisation through the knowledge sharing sessions, and ongoing enablement initiatives that scale security knowledge across engineering.

What You´ll Need

• 5 + years of hands-on experience in product security, offensive security, systems security or equivalent professional education.
• You have a practical experience with vulnerability management programmes or equivalent experience consolidating security issues from different sources and prioritising findings based on real-world risk (e.g., exploitability, exposure, business impact, CVSS/EPSS/KEV).
• You are comfortable defining and reporting vulnerability management programme metrics showing programme health and driving accountability.
• You possess technical expertise of best practices in security engineering, like secure-by-default design, least privilege, robust authentication and authorization patterns, secure secrets handling, safe dependency management, and high-quality security logging and monitoring.
• You have a strong understanding of security vulnerabilities and threat modeling. You are able to assess real-world exploitability and attack paths by reviewing code and technical documentation for security flaws.
• You can guide engineers on remediation methods and strategies across different programming languages and frameworks, earning trust and understanding the balance between security and development experience.
• You have fluent English communication skills (written and verbal) and can effectively translate complex security concepts for executive, technical, and non-technical audiences.
• You take initiative to identify gaps, improve processes, and drive security outcomes rather than waiting for issues to surface, embodying a bias for action…