Senior Software Engineer

Job Title:
Senior Software Engineer – Golang
Location:
Fully Remote Role in Canada Near Toronto
Duration: 11+ Months Contract with Possible Extension
Pay Range: $75 CAD - $85 CAD Per hour
Job Description:

Auth0 provides robust access management solutions, such as Fine-Grained Authorization (FGA) to power customer-facing applications and websites. FGA is a multi-Region software as a service (SaaS) offering flexible, fine-grained authorization at any scale. It’s based on relationship-based access control (ReBAC), which is an evolution of role-based access control (RBAC) and attribute-based access control (ABAC) authorization models.

• 5+ years of backend engineering experience with a primary focus on Go (Golang) and distributed systems. You design ergonomic, versioned APIs that delight our customers, treating the API as the product itself.
• A strong background in optimizing backend performance and reliability, moving beyond basic CRUD to understand how database internals and concurrency patterns affect high-throughput distributed systems.
• Experience implementing authorization models, preferably by implementing Fine-Grained Authorization at the application layer. You are comfortable securing multi-tenant resources and enforcing permissions within a distributed control plane.
• Operational excellence in an asynchronous, remote environment. You have a bias for small, incremental delivery (N+1) over "big bang" releases, and a habit of writing clear RFDs/RFCs to articulate and defend your engineering trade-offs.
• A mindset that values the "Distribution" of software. You understand that how our software is packaged (e.g., Helm charts, containers) directly impacts the customer experience.

• Architect and build the Go-based control plane services that power our user-facing dashboard and APIs, ensuring the system is performant, scalable, and delights our customers.
• Design and enforce the authorization logic that secures our platform, integrating our Fine-Grained Authorization engine into the ecosystem to handle complex, multi-tenant permission models.
• Provide technical leadership within the team, mentoring engineers and driving engineering decisions via RFDs and RFCs to maintain a high bar for code quality.
• Champion the reliability and observability of our services, proactively identifying performance improvements and refactoring code to ensure our systems are resilient.
• Contribute to the maintenance of our broader developer ecosystem tools as needed, ensuring consistent and high-quality experience across our offerings.

• Expertise in creating robust Helm charts for self-hosted environments and managing "Day 2" operations.
• Experience maintaining Open-Source projects, building Developer Tools (CLIs), or managing community contributions.
• Familiarity with other backend languages like Java, Python, or .NET to help guide our SDK strategy.
• Prior experience with OpenFGA, Auth0, or similar identity and access management providers.