Senior Security Engineer, Corporate

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 at Personio. We’re looking for an experienced Corporate Security Engineer to join our Security organization and help us protect the people, devices and systems that run the business. You’ll partner directly with teams across every department to ensure they can do their jobs safely, whether that means hardening endpoints and identity infrastructure, reviewing and securing the SaaS tools we rely on, responding to security events, or building automated tooling that scales protection across the company.

What You’ll Do

• Secure our macOS fleet: Own endpoint controls including EDR, hardened baselines, device posture and patching, working with IT on MDM.

• Strengthen identity and access: Improve our Identity Provider, SSO coverage and Zero Trust access. Push for least-privilege admin access and protect against account takeover and session or token theft.

• Protect our SaaS and collaboration platforms: Keep Google Workspace, Atlassian and Slack securely configured, catch misconfiguration and drift, and introduce data-loss prevention where it matters.

• Assess third-party and AI tool risk: Evolve how we review new SaaS apps, AI tools, OAuth grants and integrations, and define practical rules for the whole company.

• Defend against email threats: Maintain and improve phishing, malware and impersonation protection, plus user reporting.

• Detect and respond to incidents: Build detections on identity, endpoint, email and SaaS telemetry with Security Operations, threat-model our corporate estate, and help respond to incidents.

• Automate and support compliance: Use scripting, APIs, Infrastructure as Code and AI-assisted workflows to automate Security and IT processes, and provide controls and evidence for ISO/IEC 27001:2022 and other audits.

What You Need to Succeed Why Personio

• 5+ years in security or IT engineering: Background in security engineering, IT/systems engineering, identity, or endpoint/network administration, with part of it focused on security.

• Hands-on identity and endpoint security: Experience securing a cloud-first company with an Identity Provider (SSO, MFA, conditional access) and managed endpoints (macOS especially) running EDR and MDM.

• SaaS security at scale: A track record of driving organisation-wide security changes on Google Workspace, Atlassian or Slack without blocking the business.

• Attacker mindset: Solid understanding of how attackers target corporate environments (phishing, credential and session theft, OAuth abuse, misconfigured SaaS) and how to stop them.

• Practical coding skills: Comfortable with Python or similar to automate your work.

• Email security fundamentals: Working knowledge of DMARC, SPF, DKIM, phishing and account takeover protection, and data-leak prevention.

• Self-driven communication: Able to prioritise by risk, balance project and operational work, see problems through, and adapt your message for executive, technical and non-technical audiences.

Why Personio

Personio is an equal opportunities employer, committed to building an integrative culture where everyone feels welcomed and supported. We embrace uniqueness and understand that our diverse, values-driven culture makes us stronger. We are proud to have an inclusive workplace environment that will foster your development no matter your gender, civil status, family status, sexual orientation, religion, age, disability, education level, or race.

At Personio, we value in-person collaboration while also offering flexibility. This role requires you to be in your contracted office 2 days per month. Our office locations are Munich, Berlin, Dublin, London, Barcelona, Madrid or Amsterdam. The remaining days can be worked from home or in the office if you preferIn addition, you’ll have 20 Flex Days per year to work remotely from other locations.

Aside from our people, culture, and mission, check out some of the other benefits that make Personio a great place to work:

• Receive a competitive reward package – reevaluated each year – that includes salary, benefits, and pre-IPO equity

• Enjoy 28 days of paid vacation, plus an additional day after 2 and 4 years

• Make an impact on the environment and society with 1 (fully paid) Impact Day

• Receive generous family leave, child support, mental health support (including 24 sessions per year with Oli for yourself and 10 sessions for a significant other), and sabbatical opportunities

• We enjoy gathering for meals, cultural initiatives, and events like local Summer Sessions and year-end celebrations. There's also healthy snacks, drinks, and a weekly catered lunch.