You'll be ARQ's first Security Engineer based in Brazil – it's the chance to lay the foundation for how we do security in the region and shape how that function grows from here. You'll work closely with our global security team but have real autonomy in deciding what "good" looks like locally, from day one.
We're looking for someone who enjoys a multidisciplinary role. Security at ARQ spans Application Security, Security Operations, and Governance/Risk/Compliance, and we need someone comfortable moving across at least two of these three areas – because in a founding role, there's no one else to hand off the parts that don't fit your specialty.
What you'll doSupport application security work: threat modelling sessions, secure code review, API security testing, and CI/CD pipeline checks
Help review and monitor AI/agentic workflows for prompt risks, unsafe automated actions, and data exposure
Build and maintain SIEM detection rules, alert pipelines, and response playbooks (Datadog SIEM, CrowdStrike, Cloudflare), owning detection coverage for a defined set of systems end-to-end
Support incident response: triage alerts, execute IR playbooks, and help run tabletop exercises
Conduct cloud security assessments across AWS and Kubernetes environments under the guidance of senior team members
Execute vendor security assessments using the established due diligence framework, owning the review process for a portion of the vendor pipeline
2–4 years in information security or a closely related technical role (security operations, cloud/infra engineering with a security focus, or similar)
2+ years at a regulated fintech/bank/payment company
Working experience with at least one cloud environment (AWS preferred) and familiarity with Kubernetes fundamentals
Basic familiarity with application security concepts: threat modelling, secure code review, or API security testing
Curiosity about AI/agentic tooling risks (LLM integrations, MCP servers, automated workflows) – prior hands-on experience is a plus, not required
Exposure to SIEM platforms and an interest in detection engineering – you've written or tuned at least a few detection rules
Strong written and verbal communication in English
Competitive salary and benefits
Stock options, so you own part of what you build
Discretionary performance bonus
The latest tools and technology
A world-class team that will challenge and grow your skills
The opportunity to help build the best fintech app in Latin America
Office Policy: 3-4 days a week in-office
Skills Required
- 2-4 years in information security or a closely related technical role
- 2+ years at a regulated fintech, bank, or payments company
- Working experience with at least one cloud environment
- AWS experience
- Familiarity with Kubernetes fundamentals
- Basic familiarity with application security concepts (threat modeling, secure code review, API security testing)
- Exposure to SIEM platforms and detection engineering; experience writing or tuning detection rules
- Curiosity about AI/agentic tooling risks (prior hands-on a plus)
- Strong written and verbal communication in English
- Based in Brazil and able to work in-office ~3-4 days/week
What We Do
ARQ opens the world's strongest assets and markets to travelers, investors, and professionals in the Americas – so they can grow their money wherever they are.
Why Work With Us
We believe that small teams with the best talent outcompete massive companies with mediocre capabilities. That's why we have gathered a set of people who have done it before at iconic companies. In our quest to reshape the global financial system we have raised tens of millions of dollars from leading investors (Sequoia Capital, Founders Fund, etc)
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