高级软件工程师（Ruby），安全平台：授权

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An overview of this role

As a Senior Software Engineer on GitLab's Authorization team, you will own significant parts of the system that decides what every user, token, and automated agent can access on GitLab.com, Self-Managed, and Dedicated.

Today that work is Ruby on Rails. Roughly 400 policy classes and a YAML catalog of about 1,900 permissions sit behind every API request. You will work on the permission model itself (fine-grained token permissions, custom roles, and the GraphQL and REST surfaces that enforce them). You will also help move that model onto GitLab's next-generation authorization stack, which pairs the Rails monolith with a Rust policy engine using Zanzibar-style relationship tuples and Cedar policies. The monolith already loads that engine in-process and can reach it over gRPC.

Some examples of our projects:

• Refactoring GitLab's policy layer so the same permission definitions can be evaluated by the monolith and by our new authorization service

• Extending fine-grained token permissions to more resources and more kinds of principal, including the service identities behind AI agents

• Design and ship authorization changes in GitLab's Ruby on Rails monolith, where a single request can trigger hundreds of permission checks.

• Own a workstream end to end. Problem definition through feature-flagged rollout, dual-run verification, and cleanup.

• Build and extend fine-grained permissions for tokens and roles, and keep the permission catalog coherent as it grows.

• Extend and harden authorization enforcement across GraphQL and the REST API.

• Refactor long-lived policy code so both the monolith and our new authorization engine can evaluate it, without changing behavior for existing customers.

• Improve the reliability, performance, and security posture of existing authorization systems, including paying down permission-model debt.

• Partner with the authentication, platform, AI, and modular-service teams on interface contracts as authorization moves toward a shared service.

• Drive technical decisions in writing. Design docs, architecture decision records, and code review, in a fully asynchronous organization.

What you'll bring

• Significant experience building and operating production Ruby on Rails applications.

• Experience designing or implementing authorization systems, including role-based access control and fine-grained permissions.

• A security mindset. You treat a permission bug as a security bug, and you reason about blast radius before elegance.

• Comfort making careful changes to large, long-lived codebases. Incremental refactors, feature-flagged rollouts, and migrations that must not change behavior for existing users.

• Working knowledge of GraphQL and API authorization patterns.

• Attention to performance at scale. You understand why one uncached check matters when it runs hundreds of times per request.

• Preferred: hands-on PostgreSQL experience.

• Strong written communication. You are effective when most decisions happen in a document or a merge request rather than a meeting.

• Helpful but not required: Rust, gRPC or Protocol Buffers, Cedar or other policy languages, Zanzibar-style authorization systems, Go, or service-oriented architecture. Several engineers on this team picked up Rust for this work and we will support you doing the same.

• We welcome transferable experience from adjacent domains such as identity, policy engines, and platform security.

• Flexible Paid Time Off

• Team Member Resource Groups

• Equity Compensation & Employee Stock Purchase Plan

• Growth and Development Fund

• Parental Leave

Please note that we welcome interest from candidates with varying levels of experience; many successful candidates do not meet every single requirement. Additionally, studies have shown that people from underrepresented groups are less likely to apply to a job unless they meet every single qualification. If you're excited about this role, please apply and allow our recruiters to assess your application.

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