Senior Platform Security Engineer | Series B Fintech | Remote (US/Canada) or Hybrid NYC, base + meaningful equity

Senior Platform Security Engineer | Series B Fintech | Remote (US/Canada) or Hybrid NYC, $210k–$240k base + meaningful equity I’m working with a well-funded Series B fintech building the data and AI infrastructure behind modern financial services. Their platform processes billions of transactions for enterprise bank customers, and they’re hiring a senior engineer to own the security of the production edge that connects them to those banks. This is a high-ownership role on a small team. Your decisions will directly protect critical financial infrastructure, and as an early hire you’ll help shape the engineering and security culture. What you’ll do Own and operate mutual-TLS certificate infrastructure for enterprise bank onboarding Build the security workflow for private network connectivity, including tenancy mapping and connection monitoring Run webhook delivery security: signing-secret rotation, client-cert management and failure response Drive vulnerability remediation end-to-end, from scanning through verified closure Set and codify secure-build standards across engineering What they’re looking for 6+ years in platform, infrastructure or network security with hands-on ownership of production systems Deep PKI and certificate lifecycle experience Strong TLS/mTLS knowledge Hands-on AWS networking and security Working knowledge of OAuth 2.0 (client-credentials, JWT validation) and certificate-bound tokens A track record of setting security standards and getting engineering teams to adopt them Nice to have: fintech/payments or bank network integration experience, AWS CDK, PCI DSS or SOC 2 control implementation, and time on a small or early-stage security team. Why it’s worth a look Ground-floor opportunity at a small, well-funded team Early exercise and extended post-termination option window 100% paid medical, dental and vision premiums, plus 401(k) 12 weeks fully paid parental leave and unlimited PTO Fully remote across the US and Canada, or 1–2 days a week in the NYC office Interested, or know someone who’d be a great fit? Drop me a message for a confidential chat. #Hiring #SecurityEngineering #PlatformSecurity #PKI #AWS #Fintech #RemoteJobs