Security Engineer, Senior

ARQ; São Paulo; Presencial; BRL 180 000 - 260 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Stock options

Discretionary performance bonus

Latest tools and technology

World-class team

Office 3-4 days in-office

Competitive salary and benefits

Impact on fintech in LATAM

Resumo da oferta

ARQ is hiring its first Security Engineer in Brazil to shape security locally while partnering with a global security team. You will own foundational security practices across cloud, application security, and vendor due diligence, with opportunity to define guardrails for AI/agentic tooling.

You will collaborate across security disciplines, drive threat modelling, review secure code, and build robust detection and response capabilities in a fast-growing fintech environment.

Qualificações

• 4–7 years in information security, ideally shaping security at a startup or high-growth company.
• Hands-on experience with cloud infrastructure security (AWS, Kubernetes)
• Familiarity with application security practices: threat modelling, secure code review, CI/CD hardening, and API security testing
• Ability to assess and secure emerging AI/agentic tooling and define guardrails
• Working knowledge of SIEM platforms and detection engineering
• Experience with endpoint security tooling and identity & access management in SaaS environments

Responsabilidades

• Drive application security initiatives: threat modelling, secure code review support, API testing, and security pipeline improvements
• Assess and secure AI/agentic workflows across the company — reviewing prompts, preventing destructive actions, and controlling data exposure
• Build and improve SIEM detection rules, alert pipelines, and automated response playbooks (Datadog SIEM, CrowdStrike, Cloudflare)
• Contribute to incident response readiness, including IR playbooks, tabletop exercises, and forensic procedures
• Conduct cloud security assessments across AWS and Kubernetes environments
• Establish and run the vendor security assessment process — building a scalable due diligence framework for third-party onboarding

Conhecimentos

Cloud security

Application security

Threat modelling

SIEM/detection engineering

AWS

Kubernetes

Endpoint security

IAM/SSO

Scripting (Python)

English communication

Ferramentas

Datadog SIEM

CrowdStrike

Cloudflare

Okta

Google Workspace

SSO/SCIM

EDR/XDR

Descrição da oferta de emprego

What We're Looking For

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.

What We're Looking For

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 Do

• Drive application security initiatives: threat modelling, secure code review support, API testing, and security pipeline improvements
• Assess and secure AI/agentic workflows across the company — reviewing prompts, preventing destructive actions, and controlling data exposure
• Build and improve SIEM detection rules, alert pipelines, and automated response playbooks (Datadog SIEM, CrowdStrike, Cloudflare)
• Contribute to incident response readiness, including IR playbooks, tabletop exercises, and forensic procedures
• Conduct cloud security assessments across AWS and Kubernetes environments
• Establish and run the vendor security assessment process — building a scalable due diligence framework for third-party onboarding

What You’ll Need

• 4–7 years in information security, ideally having built or significantly shaped the security function at a startup or high-growth company - you've been the person who sets things up, not just maintains them
• Hands-on experience with cloud infrastructure security (AWS, Kubernetes)
• Familiarity with application security practices: threat modelling, secure code review, CI/CD pipeline hardening, and API security testing
• Ability to assess and secure emerging AI/agentic tooling - you understand the risks of LLM integrations, MCP servers, and automated workflows, and can define practical guardrails
• Working knowledge of SIEM platforms and detection engineering - you've written detection rules
• Experience with endpoint security tooling (EDR/XDR) and identity & access management in a SaaS-heavy environment (Google Workspace, Okta/Cloudflare Access, SSO/SCIM)
• Experience running or contributing to vendor security assessments and third-party due diligence
• Strong written and verbal communication in English

Benefits

• 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