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Security Engineer | Generalist

ARQ · Hybrid, London, GB

Posted Nov 6, 2026

About the job

WHAT YOU'LL DO - 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 - Support DLP strategy and data protection controls across Google Workspace, Slack, and internal tooling - Conduct cloud security assessments across AWS and Kubernetes environments - 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 - 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 cyber 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 - 2+ years at a regulated fintech/bank/payment company - Hands-on experience with cloud infrastructure security (AWS, Kubernetes) - Working knowledge of SIEM platforms and detection engineering - you've written detection rules, not just consumed alerts - Familiarity with application security practices: threat modelling, secure code review, CI/CD pipeline hardening, and API security testing - Experience with endpoint security tooling (EDR/XDR) and identity & access management in a SaaS-heavy environment (Google Workspace, Okta/Cloudflare Access, SSO/SCIM) - 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 - Experience running or contributing to vendor security assessments and third-party due diligence - Strong written and verbal communication - Business fluent 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

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