Senior Security Infrastructure Engineer
$60,000–$114,000 year
Remote · United States or Bogotá, Bogota D.C., Colombia
Job Summary
Senior Security Infrastructure Engineer role focused on strengthening Sezzle’s security posture across cloud infrastructure, applications, and developer workflows. You will lead vulnerability management, build and mature SIEM/XDR capabilities, investigate security incidents, design detection strategies, and drive security engineering across AWS, Kubernetes, and CI/CD hardening. Responsibilities include threat modeling, security design reviews, supply-chain risk controls, data protection, and automation (including AI) to improve detection, response, and operational efficiency. The role emphasizes hands-on execution, end-to-end remediation, and collaboration with engineering teams to embed security into development and deployment.
Required Qualifications
- 6+ years of experience in security, software, or infrastructure engineering
- hands-on experience securing cloud-based production systems
- experience contributing to threat modeling and security design reviews
- experience with vulnerability management (scanning, triage, remediation coordination)
- experience with SIEM/XDR platforms (e.g., Wazuh, Splunk, ELK)
- practical experience triaging vulnerability findings and coordinating remediation
- strong knowledge of AWS, Linux, and Kubernetes security
- experience with CI/CD hardening and software supply chain risk
- experience with container and dependency security tools (Snyk, Trivy, Grype)
- ability to investigate issues using logs and cloud tooling
- knowledge of PCI DSS and SOC 2 compliance
- demonstrated experience with AI/tools for productivity
- secure development and deployment practices
- ability to design and tune detection rules
- cloud-native security controls (IAM, network segmentation, container security)
- experience with automation and AI to reduce manual effort
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