Lead Engineer - Security
Workplace: STOCKHOLM, Sverige
Expires: August 13, 2025
Lead Engineer - Security position at Klarna Bank AB, focusing on application security, threat modeling, and secure software development in a global fintech environment.
Main requirements:
  • 3–6+ years of experience in application security, software engineering, or related fields
  • Strong understanding of secure software design principles and common threat modeling frameworks
  • Experience conducting security design and architecture reviews in complex, distributed systems
  • Solid programming background, preferably Python
  • Familiarity with cloud-native application security (AWS), APIs, and microservices
  • Strong interpersonal and communication skills to collaborate with diverse engineering teams
Responsibilities:
  • Conduct structured threat modeling sessions to identify and prioritize security risks in new and existing products
  • Perform technical reviews of system and application designs to assess security implications and recommend improvements
  • Collaborate with engineering teams to integrate security best practices into the Secure Development Lifecycle (SDLC)
  • Work with product and infrastructure architects to design secure systems from the ground up
  • Define reusable security patterns, design principles, and guardrails to scale secure development
  • Create clear threat models, risk assessments, and design review reports for technical and non-technical stakeholders
  • Support the integration of security tools and automation into CI/CD pipelines as needed
  • Deliver workshops or training on secure design, coding practices, and threat modeling methodologies
Required hard skills:
  • Threat modeling
  • Security design and architecture reviews
  • Secure software design principles
  • Programming in Python
  • Cloud-native application security on AWS
  • API security
  • Microservices security
Recommended hard skills:
  • Integration of security tools into CI/CD pipelines
  • Automation in security processes
Soft skills:
  • Strong interpersonal skills
  • Effective communication
  • Collaboration with diverse engineering teams
Coding languages:
  • Python
Frameworks:
  • Threat modeling frameworks (unspecified)
Natural languages:
  • English (Proficient)
Cultural skills:
  • Ability to work in global and diverse multinational teams
  • Adaptability to dynamic fintech industry environment
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