Principal Identity and API Architect (Adtech)

TL;DR

Principal Identity and API Architect (Adtech): Designing and owning an end-to-end identity platform and API security strategy for a programmatic marketplace with an accent on authentication, authorization, and API governance. Focus on building scalable multi-tenant authorization models, implementing OIDC/OAuth 2.0 flows, and managing complex identity integrations for publishers and demand partners.

Location: New York, New York, United States

Salary: $175,000 - $250,000 USD

Company

hirify.global is an advertising platform that elevates digital advertising through beautiful creative, quality publishers, and smart targeting.

What you will do

• Architect and own the end-to-end identity platform, including tenant models, SSO integrations, and machine-to-machine authentication.
• Design and implement Auth0 tenant architecture, custom domains, and token lifecycle management.
• Define and enforce OAuth 2.0 and OIDC flows (PKCE, M2M) to ensure secure authentication for all platform participants.
• Build multi-tenant authorization models using OpenFGA or comparable ReBAC systems (e.g., SpiceDB, Ory Keto).
• Own the API gateway layer, designing rate limiting, scoped token validation, and mTLS enforcement across Traefik, Kong, or AWS.
• Lead identity integrations for publishers (SAML 2.0, OIDC) and demand-side partners (DSP/Agency API authentication).

Requirements

• 8+ years of software engineering or platform architecture experience, with 4+ years focused on identity, IAM, or API security.
• 2+ years of hands-on production experience with Okta's Auth0.
• Production experience with OpenFGA or a comparable relationship-based access control (ReBAC) system.
• Deep fluency in OAuth 2.0, OpenID Connect, SAML 2.0, JWT, and JWKS.
• Demonstrated experience with AWS identity and API infrastructure (IAM, API Gateway, Lambda authorizers, Cognito).
• Proficiency in at least one backend language such as Go, Java, or Python.

Culture & Benefits

• Comprehensive Medical, Dental, and Vision plans.
• Flexible Paid Time Off (PTO) policy.
• 401k plan with employer match.
• Positive, collaborative, and compassionate team environment.