Founding Security Engineer - FinTech, AI & Cloud

DolarApp; Greater London; Hybrid; GBP 80,000 - 120,000; Full time

Benefits offered by this job

Stock options

Discretionary bonus

Latest security tools

Job summary

ARQ is seeking a founding Security Engineer to establish security foundations across our platform, working closely with the global security team and taking ownership from day one.

The role spans Application Security, Security Operations, and Governance/Risk/Compliance, requiring versatility across at least two areas. You’ll help shape risk controls, incident readiness, and vendor due diligence within a growing fintech context.

Qualifications

• 4-7 years in information security, ideally having built or significantly shaped the security function at a startup or high-growth company.
• 2+ years at a regulated fintech/bank/payment company
• 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 - understand risks of LLM integrations and guardrails
• Working knowledge of SIEM platforms and detection engineering - written detection rules
• Experience with endpoint security tooling (EDR/XDR) and IAM 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

Responsibilities

• 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

Skills

Security engineering

Threat modelling

CI/CD security

Cloud security

SIEM/detection engineering

Vendor assessments

English communication

Tools

Datadog SIEM

CrowdStrike

Cloudflare

AWS

Kubernetes

Okta

Google Workspace

SSO/SCIM

Job description

ARQ is seeking a founding Security Engineer to establish security foundations across our platform, working closely with the global security team and taking ownership from day one.

The role spans Application Security, Security Operations, and Governance/Risk/Compliance, requiring versatility across at least two areas. You’ll help shape risk controls, incident readiness, and vendor due diligence within a growing fintech context.