Join one of the UK’s most exciting FinTech scale-ups as they expand globally and put security at the centre of their engineering DNA.

They’re growing fast and need a Senior Security Engineer to embed secure development practices, build developer-friendly security tools, and shape how software is built and protected across their web and mobile platforms.

If you want to own the secure development lifecycle and influence a modern DevSecOps culture in a company used by millions — this is your chance.

Impact You’ll Make

• Drive security by design across the entire SDLC.
• Build and automate security controls into CI/CD pipelines.
• Lead threat modeling and turn findings into actionable improvements.
• Define secure architecture patterns, libraries, and reusable frameworks.
• Champion secure coding and mentor engineers across teams.
• Build tools, dashboards, and programs that make security part of daily development life.
• 5+ years in AppSec or Product Security.
• Deep knowledge of web, mobile, and API vulnerabilities.
• Hands‑on experience integrating SAST/DAST/IAST/SCA tools.
• Strong understanding of OWASP Top 10, ASVS, MASVS, and SAMM.
• Familiarity with OAuth2, OIDC, WebAuthn.
• Bonus: experience in FinTech, payments, or high‑trust environments.
• Experience with PCI‑DSS, PSD2, or Strong Customer Authentication.
• Running security champion programs or dev training.
• Mobile app protection or pen testing background.
• Up to £100K salary (DOE).
• Hybrid: 4 days onsite in London, 1 from home.
• Work with modern financial platforms impacting global users.
• Continuous investment in your learning and certifications.
• Clear progression path to Staff / Principal Security Engineer.

If you’re a Senior Security Engineer ready to embed security at scale, influence engineering culture, and protect financial products trusted worldwide, hit apply — we’d love to talk.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Information Technology

Industries

Technology, Information and Media