Lead Security Engineer at ARQ Finance

<h1>About ARQ </h1><p style="min-height:1.5em">ARQ is one of the fastest-growing fintechs in the world. Our mission is to redefine how people interact with money across borders, building the infrastructure to move value seamlessly. We're still early in our journey, which means every person who joins shapes the future of our product, culture, and growth. If you're excited by big challenges, global impact, and the chance to grow fast with a world-class team, ARQ is the place to do it.</p><p style="min-height:1.5em"></p><h1><strong>What you'll do</strong></h1><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Set the technical direction for detection engineering, alert pipelines, and automated response across the security stack (Datadog SIEM, CrowdStrike, Cloudflare), and raise the bar on how the team designs and reviews detections</p></li><li><p style="min-height:1.5em">Own incident response readiness at a program level: design IR playbooks, lead tabletop exercises, and act as technical lead during major incidents</p></li><li><p style="min-height:1.5em">Define DLP and data protection strategy across Google Workspace, Slack, and internal tooling, and guide the team executing it</p></li><li><p style="min-height:1.5em">Set the standard and approach for cloud security assessments across AWS and Kubernetes, reviewing findings from other engineers and tackling the most complex environments directly</p></li><li><p style="min-height:1.5em">Drive the application security roadmap: threat modelling standards, secure code review practices, API security testing strategy, and security pipeline architecture</p></li><li><p style="min-height:1.5em">Define the company's approach to securing AI/agentic workflows – setting guardrails for prompts, destructive actions, and data exposure, and advising other teams building with LLMs/MCP servers</p></li><li><p style="min-height:1.5em">Own the vendor security assessment framework itself: continuously improving the due diligence process and handling the highest-risk vendor reviews</p></li><li><p style="min-height:1.5em">Act as a technical mentor to mid and senior engineers, reviewing their detection logic, assessments, and playbooks without formal management responsibilities</p></li></ul><p style="min-height:1.5em"></p><h1>What you'll need</h1><ul style="min-height:1.5em"><li><p style="min-height:1.5em">7+ years in information security, including demonstrated experience building or substantially maturing a security function or program from the ground up </p></li><li><p style="min-height:1.5em">2+ years at a regulated fintech/bank/payment company</p></li><li><p style="min-height:1.5em">Deep, hands-on expertise in cloud infrastructure security (AWS, Kubernetes), able to architect controls</p></li><li><p style="min-height:1.5em">Strong detection engineering background – you've designed detection strategy and mentored others in writing rules</p></li><li><p style="min-height:1.5em">Proven experience driving application