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Staff Software Engineer, Identity Platform

United States, San Francisco 230000.00 - 310000.00 USD / Year · Job Posted February 20, 2026
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Job Description

You'll own Gamma's identity and authentication infrastructure as we scale beyond 100 million users. This means architecting the systems that enable secure authentication for every user interaction, building OAuth flows that power integrations with platforms like ChatGPT and Claude, and leading our migration to a modern identity platform. Your work will touch every user and enable critical partnerships that define how Gamma fits into the broader ecosystem. As a Staff Engineer focused on identity, you'll balance hands-on engineering with strategic technical leadership. You'll design authentication systems that balance security, usability, and performance, partner with security and compliance teams to meet SOC 2 and GDPR requirements, and establish best practices for authentication across Gamma's engineering organization.

Job Responsibility

  • Own Gamma's end-to-end authentication and authorization systems, ensuring security, reliability, and excellent user experience
  • Lead the technical strategy and execution for migrating 100M+ users from AWS Cognito to a modern identity platform
  • Design and implement OAuth 2.0 and OpenID Connect flows that enable Gamma to act as an identity provider for third-party integrations
  • Build and maintain SSO integrations (SAML, OIDC) for enterprise customers
  • Partner with security and compliance teams to ensure identity systems meet SOC 2, GDPR, and regulatory requirements
  • Collaborate with product and engineering teams to implement authentication features like MFA, passkeys, and session management

Requirements

  • 8+ years of software engineering experience with at least 3 years focused on identity, authentication, or security systems
  • Deep expertise with OAuth 2.0, OpenID Connect, SAML, and modern authentication protocols
  • Hands-on experience acting as an OAuth provider and implementing authorization servers
  • Proven track record executing large-scale identity migrations (millions of users) with zero downtime
  • Strong understanding of identity providers (Cognito, Auth0, WorkOS, Okta) and their tradeoffs
  • Expert knowledge of authentication security best practices: password hashing, token management, credential storage, session security

Nice to have

  • Experience with WorkOS, AWS Cognito, or Auth0 in production environments
  • Knowledge of WebAuthn, FIDO2, and passwordless authentication
  • Experience building developer-facing authentication SDKs or APIs
  • Experience working at a high-growth SaaS company with enterprise customers

What we offer

competitive equity

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