Senior Software Engineer (RoR/Go), SSCS: Authentication

An overview of this role

Help us build the next generation of authentication services at GitLab. As a Senior Backend Engineer on the Authentication team, you'll work on authentication features across the Rails monolith and GATE, our new identity and access management control and data plane that supports every GitLab deployment model.

In this role, you'll expand authentication mechanisms such as support for agentic identities while helping keep GitLab and its customers secure through robust access management tooling and by addressing vulnerabilities reported through our HackerOne program.

The Authentication team works across many core components used by external users and GitLab teams. GATE will become the foundation for token issuance, validation, and identity services across GitLab.com multi-tenant SaaS, Self-Managed, Dedicated, and air-gapped environments. This means your work will have a direct impact on the GitLab product and the customers and users who rely on it.

Some of our projects include:

• Building GATE as the centralized service for token issuance and validation
• Token consolidation and migration of authentication paths out of the Rails monolith
• Passkeys and passwordless authentication
• Composite identities to merge machine and human authorization for AI
• Service accounts and secure automation improvements
• Security Assertion Markup Language (SAML), Lightweight Directory Access Protocol (LDAP), OpenID Connect (OIDC), and System for Cross-domain Identity Management (SCIM) enhancements for automated user provisioning and single sign-on (SSO)

What you'll do

• Contribute to the team's overall direction and play a direct part in shaping the future roadmap of GATE and GitLab's authentication services.
• Design and implement authentication features across the Rails monolith and GATE, including token issuance, validation, and identity services.
• Help migrate authentication and token management paths from the monolith into GATE while maintaining reliability across all deployment models.
• Build authentication mechanisms from the ground up, such as Workload Identity Federation.
• Bolster the security posture of our users and organizations through robust access management and by addressing vulnerabilities reported through our HackerOne program.