Senior Security Infrastructure Engineer

Sezzle is seeking a Senior Security Infrastructure Engineer to help strengthen its security posture across cloud infrastructure, applications, and developer workflows. The role involves identifying risks, investigating issues, and driving meaningful security improvements across systems. The ideal candidate should have 6+ years of experience in security, software, or infrastructure engineering, with hands-on experience securing cloud-based production systems and working with real-world security challenges.

Requirements

• 6+ years of experience in security, software, or infrastructure engineering
• Hands-on experience securing cloud-based production systems and working with real-world security challenges
• Experience contributing to threat modeling and security design reviews for modern systems
• Strong hands-on experience in vulnerability management
• Experience working with SIEM platforms for detection engineering, monitoring, and incident response
• Practical experience triaging findings from vulnerability scanners and bug bounty programs
• Strong knowledge of AWS, Linux, and Kubernetes infrastructure
• Experience improving infrastructure security, including CI/CD hardening and mitigating software supply chain risks
• Experience with container and dependency security tools

Benefits

• Generous Paid Time Off
• 401k Matching
• Retirement Plan
• Visa Sponsorship
• Four Day Work Week
• Generous Parental Leave
• Tuition Reimbursement
• Relocation Assistance