Lead Security Engineer
Core
Lead security for a $100M+ marketplace handling payments and customer data, transitioning from informal practices to a deliberate, instrumented security function while securing AI-agent authored code.
Role type
Lead Security Engineer (founding hire transitioning to team lead)
Builds
Security controls, standards, playbooks, and a scalable security team for a multi-brand home services platform.
Domain
Fintech / Marketplace / Cloud Security / AI Security
Deliverable
production ML models | infrastructure | dashboards & analysis
Required skills
Application security, Cloud infrastructure security (AWS), Compliance (PCI, SOC 2, LGPD), Detection & response, AI security engineering, Security architecture
Preferred skills
Team leadership, Security strategy, Automation engineering
Technologies
AWS, EKS, Kubernetes, Datadog, Sentry, PHP/Laravel, TypeScript/React, SAST, Secret scanning
Responsibilities
Design threat models and risk registers, implement secure-SDLC and CI scanning pipelines, harden AWS infrastructure and Kubernetes, lead incident response, define security standards for AI-agent code, build the foundation for a future security team.
Seniority
Senior, hands-on IC transitioning to leadership