Senior Backend Engineer — Enterprise API & Auth

Slack; San Francisco (CA); On-site; USD 173,000 - 260,000; Full time

Job summary

Salesforce’s Enterprise Productivity team seeks a senior backend engineer to design authentication and admin workflows, integrating Google Workspace and Microsoft 365 while building scalable backend services.

You will collaborate with product, design, frontend, and 3P integrations, contribute to MCP connectors, ensure secure, well-documented designs, and mentor teammates in a collaborative culture.

Qualifications

• 6+ years of professional experience building web applications or backend services.
• Experience with PHP/Hack, Java, Python, Ruby, Go, or similar languages.
• Experience with OAuth 2.0/OIDC and authorization models, ideally with Google Workspace or Microsoft 365 / Entra ID integrations.
• Ability to contribute to technical architecture discussions and drive technical decisions within the team.
• Understandable, testable, maintainable code.
• Strong communication skills, including explaining complex concepts to designers, support, and other engineers, and collaborating across teams.
• Solid computer science fundamentals: data structures, algorithms, distributed systems, and information retrieval.
• A related technical degree.

Responsibilities

• Design and build backend services and API methods for admin and user authentication and connection flows with Google and Microsoft (OAuth, domain-wide delegation, token management, and permission policies).
• Own and evolve the Admin Productivity Suite backend, including bulk approve/install pipelines, install-state storage, failure handling, and admin analytics.
• Partner with Product, Design, and Frontend to ship features that raise connected-user and DWA adoption, using experiments and data to guide the roadmap.
• Work across team boundaries (Platform, Slackbot, Enterprise Search, 3P Integrations) on shared permission, auth, and connector frameworks, including the evolution from 2.0 connectors toward MCP.
• Contribute heavily to team projects with significant business impact, and own the long-term health of the systems you build.
• Write secure, well-documented designs and work with Security through scoped review.
• Help support and operations triage and resolve production issues.
• Mentor other engineers, review code in depth, and improve engineering standards, tooling, and processes.

Skills

Backend development

OAuth 2.0/OIDC

Distributed systems

Strong communication

Technical architecture

CS fundamentals

Education

Related technical degree

Tools

PHP/Hack

Java

Python

Ruby

Go

Job description

Salesforce’s Enterprise Productivity team seeks a senior backend engineer to design authentication and admin workflows, integrating Google Workspace and Microsoft 365 while building scalable backend services.

You will collaborate with product, design, frontend, and 3P integrations, contribute to MCP connectors, ensure secure, well-documented designs, and mentor teammates in a collaborative culture.