Senior Backend Engineer - APIs & OAuth for Enterprise

Slack; New York (NY); On-site; USD 172,000 - 260,000; Full time

Job summary

Salesforce's Enterprise Productivity team is hiring senior backend engineers to design and build authentication flows and admin tooling for Google Workspace and Microsoft 365 integrations. You’ll partner across Platform, Slackbot, and 3P Integrations to ship secure, scalable backend services using PHP/Hack, Java, and MySQL.

You should have 6+ years building web apps or backend services, strong CS fundamentals, and proven ability to influence technical decisions while delivering high-quality,

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.
• Solid CS 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.
• Own and evolve the Admin Productivity Suite backend, including bulk approve/install pipelines and analytics.
• Partner with Product, Design, and Frontend to ship features that raise adoption using experiments and data.
• Work across team boundaries on shared permission, auth, and connector frameworks, including MCP.
• Contribute to team projects with significant business impact and ensure long-term health of systems.
• 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.

Skills

6+ years experience

PHP/Hack

Other languages

OAuth/OIDC

Architecture

Code quality

Communication

CS fundamentals

Education

Related technical degree

Tools

Google APIs

Microsoft Graph

Entra ID

Job description

Salesforce's Enterprise Productivity team is hiring senior backend engineers to design and build authentication flows and admin tooling for Google Workspace and Microsoft 365 integrations. You’ll partner across Platform, Slackbot, and 3P Integrations to ship secure, scalable backend services using PHP/Hack, Java, and MySQL.

You should have 6+ years building web apps or backend services, strong CS fundamentals, and proven ability to influence technical decisions while delivering high-quality,