Senior Offensive Security Engineer
at Klarna
Posted 19 hours ago
No clicks
- Compensation
- Not specified
- City
- Milan
- Country
- Italy
Currency: Not specified
Klarna seeks a Senior Offensive Security Engineer to lead offensive security efforts by conducting penetration tests, managing bug bounty submissions, and performing security analyses on internal and public-facing assets. You will develop tooling for reconnaissance and automation, investigate findings, assess third-party solutions, and provide remediation guidance to developers and security teams. The role emphasizes hands-on pentesting, cloud (AWS) and microservice knowledge, Java/Node.js code review, and Python scripting. There is an opportunity to work in Milan within a multicultural team and contribute to maturing Klarna's security program.
What you will do
As a Senior Offensive Security Engineer at Klarna, you will be at the forefront of safeguarding our digital infrastructure and customer data. This position demands a blend of hacking skills, creativity, and a deep understanding of cyber threats. You will simulate sophisticated cyber attacks to identify vulnerabilities, ensuring Klarna's resilience against real-world threats.
• Conduct white-box and black-box penetration testing against internal and public-facing applications and assets.
• Manage, triage, and investigate Bug Bounty submissions and external pentest findings.
• Perform variant analysis on issues discovered through all channels.
• Research and perform security analyses on Klarna’s 3rd-party solutions.
• Develop tooling to support reconnaissance, automation, and metrics collection.
• Provide expert guidance to developers, product security teams, and SOC investigations.
• Spread awareness of offensive security practices via demos, workshops, and training.
• Assess the security of our tech stack and help mature Klarna’s security program.
Who you are
• Strong experience with penetration testing and technical security assessments.
• Experience identifying security issues in code, particularly within Java and Node.js.
• Experience with cloud environments, especially AWS and modern microservice design.
• Comfortable communicating findings clearly with concrete remediation recommendations.
• Skilled in Python scripting and automation.
• Self-driven, proactive, and engaged in advancing Klarna’s security culture.
• Industry-recognized certifications (e.g., OSCP, OSWE, CREST, GIAC, AWS).
• Active participation in CTFs and cybersecurity communities.
Awesome to have
• Collaboration within a diverse and innovative global team.
• Opportunity to work in Milan with a multicultural environment.
• Challenging scope with exposure to cutting-edge technologies.
Please include a CV in English.
Curious to learn more about Klarna and what it’s like to work here? Explore our career site!
