Security Engineering Specialist

2 days ago


Stockholm, Stockholm, Sweden Klarna Full time

Klarna is a dynamic and innovative company that's changing the way people shop. We're seeking a talented Senior Offensive Security Engineer to join our team and help us ensure the security and integrity of our systems. As a key member of our security team, you will be responsible for conducting penetration testing, managing bug bounty submissions, and developing tooling to support reconnaissance, automation, and metrics collection.

The ideal candidate will have a strong background in penetration testing and technical security assessments, with experience identifying security issues in code, particularly within Java and Node.js. They will also be comfortable communicating findings clearly and effectively, with concrete remediation recommendations beyond simple issue reporting.

What You'll Do:
  • 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.
  • Develop tooling to support reconnaissance, automation, and metrics collection.
  • Provide expert guidance to developers, other product security teams, and the SOC in investigating issues.
  • Spread awareness of offensive security practices via demos, workshops, and training.
  • Assess the security of our tech stack through whatever means are best suited.
  • Define what we focus on to provide the most value.
  • Help further mature Klarna's security program.


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