Senior Security Engineer (Fintech)

TL;DR

Senior Security Engineer (Cybersecurity): Building and scaling the technical security function for a spend management platform with an accent on vulnerability management, SIEM operations, and secure development. Focus on automating security tooling, leading incident response, and embedding security into the CI/CD pipeline.

Location: Hybrid in Paris, Barcelona, or London

Company

AI-powered spend management and procurement platform transforming company spending for businesses with up to 1,000 employees.

What you will do

• Manage the bug bounty program and lead vulnerability triage and high-severity findings.
• Own the SIEM platform (ElasticSearch) and evolve detection coverage and security runbooks.
• Oversee IAM implementation for product and infrastructure, including SSO/MFA and secrets rotation.
• Embed security into the SDLC through threat modeling, secure code reviews (TypeScript, Node.js, Python), and CI/CD hardening.
• Coordinate penetration tests and security audits, driving the subsequent remediation plans.
• Mentor associate security engineers and coach development teams on secure coding practices.

Requirements

• Proven experience in code auditing, infrastructure security (AWS/Linux), penetration testing, or SIEM operations.
• Ability to own a technical roadmap and communicate complex risks to non-technical stakeholders.
• Deep understanding of cloud-native web architectures, microservices, and PaaS/SaaS.
• Strong proficiency in scripting and automation using Python or Bash.
• Experience mentoring other engineers or security practitioners.
• Must be based in or able to work hybridly from Paris, Barcelona, or London

Nice to have

• Experience with ELK stack in production.
• Familiarity with Snowflake, Datadog, or Okta.
• Knowledge of ISO 27001, OWASP, SOC 2, or PCI-DSS.
• Background in regulated fintech or payments environments.

Culture & Benefits

• Flexible on-site and remote policy.
• Latest Apple equipment provided.
• Mental health support via Moka.care.
• Location-specific benefits including health insurance, wellness allowances, and meal vouchers.
• Culture of trust, empowerment, and ownership.