ARQ

Security Engineer | Generalist

London
Level
Mid
Work type
Hybrid · London

Not stated in the posting: salary, visa.

Open. First seen 8 May 2026.

About the role

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

What this role asks for

Standard for security roles

AWS · Cybersecurity

Common in security postings at any company.

Compared with ARQ's other open jobs.

The team: Security

This role is one of 6 open in Security. 6 were posted in the last 30 days.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

AWS (6 of 6), Cloudflare (4 of 6), CrowdStrike (4 of 6), Datadog (4 of 6), Kubernetes (4 of 6), Okta (4 of 6), SIEM (4 of 6)

OTHER ROLES ON THIS TEAM

From the team and dates on ARQ's own job board.

Other openings for this role

2 open postings for this role in London, first posted 8 May 2026. The company is likely hiring for more than one position. None has been taken down and posted again.

See Security Engineer salaries in London →

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