Senior Backend Engineer(Golang),Software Supply Chain Security: Auth Infrastructure

An overview of this role

As a Senior Backend Engineer on the Auth Infrastructure team at GitLab you’ll build the critical infrastructure layer that powers authentication and authorization for millions of users across GitLab.com self-managed Dedicated and air-gapped environments. You’ll focus on secure performant and reliable identity services while helping GitLab move toward a zero-trust architecture and microservices-based future. You’ll work closely with Authentication Authorization Platform and Infrastructure teams to design and implement components like Envoy proxy configuration token services bi-directional gRPC tunnels mTLS and service mesh architecture and to add robust observability and debugging for distributed auth systems.

This role gives you the opportunity to solve authentication infrastructure challenges at global scale and directly influence the roadmap for GitLab’s secure and scalable authentication solution. Your work will empower GitLab system administrators to balance security and accessibility shaping the first impression customers have when they log in onboard users and manage core security rules for their instances.

What you’ll do

• Design and implement core components of GitLab's authentication infrastructure layer including Envoy proxy configuration token services and policy decision systems.

• Develop solutions for critical infrastructure challenges such as bi-directional gRPC tunnels mutual Transport Layer Security (mTLS) and service mesh architecture.

• Build and maintain authentication infrastructure that supports GitLab.com self-managed Dedicated and air-gapped deployment models.

• Optimize the performance and reliability of authentication and authorization decisions at scale across distributed systems.

• Implement and refine monitoring observability and debugging capabilities for authentication services to ensure secure and stable operation.

• Collaborate with Authentication Authorization Platform and Infrastructure teams to align infrastructure capabilities with product and architectural requirements.

• Contribute to the team’s technical direction and roadmap for secure scalable authentication including standards for style maintainability and best practices.

• Represent GitLab and its values through participation in public communication broader initiatives and contributions to relevant open source projects.

What you’ll bring

• Strong experience building high-performance backend services in Go and/or Rust ideally in large-scale distributed environments.

• Hands-on experience with proxy and edge technologies such as Envoy Traefik HAProxy or nginx including configuration and operation in production.

• Practical experience with service mesh architectures mutual TLS (mTLS) zero-trust networking and secure service-to-service communication patterns (gRPC REST).

• Working knowledge of database and storage technologies such as RDS Google Spanner Postgres or similar including schema design and performance considerations.

• Understanding of token systems (for example JWT or Macaroons) cryptographic signing and key management for authentication and authorization workflows.

• Experience with Kubernetes container orchestration and cloud-native deployment patterns including observability monitoring and debugging of distributed systems.

• Ability to own projects from concept to production including proposing designs driving discussions and delivering in a highly agile iterative environment.

• Effective written and verbal communication in English with a collaborative solution-oriented mindset and openness to learning from and supporting team members with diverse backgrounds and transferable skills.

About the team

At GitLab we on the Auth Infrastructure team sit within the Software Supply Chain Security group and focus on building and maintaining the core authentication and authorization infrastructure that underpins all GitLab deployment models. Our mission is to give GitLab system administrators the tools they need to balance security and accessibility making the first authentication experience smooth while ensuring identity services are secure flexible and scalable. You’ll work as part of a small distributed team that collaborates asynchronously across time zones with Authentication Authorization Platform and Infrastructure teams to support GitLab’s shift toward microservices and zero-trust networking. We are currently focused on solving challenges like high-scale auth performance secure service-to-service communication and supporting complex environments including GitLab.com self-managed Dedicated and air-gapped deployments.