Responsibilities
- Design and evolve secure multi-tenant architectures (Agency → Account → App or equivalent hierarchy) for 100k+ agencies
- Define and enforce tenant isolation guarantees at data, API, and infra levels
- Build and review authorization models (RBAC / ABAC / hybrid)
- Own token systems (API keys, OAuth flows, JWTs, scoped tokens, rotation, expiry)
- Design fine-grained scopes for internal APIs, public APIs, and partner integrations
- Map scopes → permissions → resources consistently
- Prevent over-scoped tokens and privilege escalation
- Lead security-critical backend designs (authZ boundaries, impersonation, auditability)
- Set patterns for secure-by-default APIs used by internal and external teams
- Partner with Infra/Security teams on Secrets management, Key rotation, Rate limiting & abuse prevention, Compliance readiness (SOC2 style thinking)
- Act as a multiplier: raise the security bar across engineering via reviews, RFCs, and mentoring
Requirements
- 8+ years of backend engineering experience
- Proven experience building secure, multi-tenant SaaS platforms
- Deep understanding of: Authorization models (RBAC, ABAC), OAuth2 / JWT / API key systems, Threat modeling & security tradeoffs
- Strong system design skills - especially for long-lived platforms
- Comfort owning ambiguous, high-impact areas
Nice to Have
- Experience designing platforms used by multiple internal teams
- Security reviews, incident learnings, or compliance exposure
- Experience with large-scale migrations (auth or identity related)
- Background in developer platforms or core infrastructure teams
Work Arrangement
Remote (Worldwide)
