Security Engineer, Lead
Core
Founding Lead Security Engineer building ARQ's security function in Brazil, covering application security, security operations, and governance/risk/compliance.
Role type
Lead Security Engineer (founding role)
Builds
Security roadmap, AI/agentic workflow guardrails, detection engineering pipelines, cloud security assessments, and vendor security frameworks.
Domain
Fintech / Cloud Security / Application Security
Deliverable
production ML models | product features | infrastructure
Required skills
Cloud infrastructure security (AWS, Kubernetes), Application security program design, Detection engineering, Incident response leadership, Vendor security assessment, Identity & access management (IAM) architecture, AI/agentic workflow security, Security function build-up from scratch
Preferred skills
Experience in regulated fintech/bank/payment companies, Mentoring mid/senior engineers
Technologies
AWS, Kubernetes, Datadog SIEM, CrowdStrike, Cloudflare, Google Workspace, Okta, Cloudflare Access
Responsibilities
Drive application security roadmap including threat modelling and secure code review; Define security guardrails for AI/agentic workflows; Set technical direction for detection engineering and alert pipelines; Own incident response readiness and playbooks; Lead cloud security assessments on AWS and Kubernetes; Own vendor security assessment framework; Mentor mid and senior engineers on detection logic and assessments.
Seniority
Lead, hands-on IC with mentorship responsibilities
