Spendesk
Associate Security Engineer
London, United Kingdom· HYBRID
About the role
Fintech sharpens the priorities: authorisation logic, idempotency and race conditions matter more here than any scanner finding. You work close to the payments engineers rather than reviewing them from a distance.
What you will do
- Review payment and authorisation flows
- Improve secure defaults in shared libraries
- Support incident response when it is needed
What they ask for
- One to three years in application security or backend engineering
- Understand race conditions and idempotency
- Right to work in the UK
Nice to have
- PCI DSS exposure
- Experience with Node or Go
What applying with Rooted means
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This role is curated by Rooted. Rooted is not the hiring company unless explicitly stated. The hiring company is Spendesk. Confirm the final details with the original source or during the application process.
Posted 2026-08-12