Senior Backend Engineer (Authorization & User Management)

Requirements

• 5+ years of backend engineering experience with strong expertise in TypeScript, Node.js, and structured backend frameworks such as NestJS
• Strong domain experience in authorization, identity, or user management systems in production SaaS environments
• Excellent system design skills: you can model roles, permissions, policy propagation, and service boundaries in a way that stays understandable as the platform grows
• Experience with enterprise identity concepts such as SSO, RBAC, provisioning, deprovisioning, webhooks, SCIM, or IdP integrations
• Multi-tenant SaaS experience with strong awareness of tenant isolation, auditability, and security-sensitive change management
• Event-driven systems experience: comfortable with asynchronous workflows, retries, idempotency, and eventual consistency in backend services
• Testing discipline: you write tests for critical business and security logic, not just happ...