Senior Software Engineer (LMTS), Backend – Enterprise Productivity

Slack•Seattle, WA

5d•$172,500 - $285,800

About The Position

The Senior Software Engineer (LMTS), Backend – Enterprise Productivity role is on Slack’s Enterprise Productivity team, which connects organizations to Google Workspace, Microsoft 365, and admin tools. The team works to improve interoperability between Slack and these productivity suites and make Slack a strong choice for enterprise customers. You will collaborate with product managers, designers, frontend, mobile, and quality engineers, as well as partner teams across Platform, Slackbot, Enterprise Search, and 3P Integrations. The team builds with PHP/Hack, Java, and MySQL; experience with these technologies is helpful, while familiarity with other web languages such as Python, Ruby, or Go and relational databases is also suitable. The role emphasizes simplicity, reliability, security, and collaboration, and includes ownership of systems with significant business impact.

Requirements

At least 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; Google Workspace or Microsoft 365 / Entra ID integrations, including admin consent, domain-wide delegation, Graph, or Google APIs, are particularly relevant.
Ability to contribute to technical architecture discussions and drive technical decisions within the team.
Ability to write understandable, testable, and maintainable code.
Strong communication skills, including explaining complex concepts to designers, support staff, and engineers, and collaborating across teams.
Solid computer science fundamentals, including data structures, algorithms, distributed systems, and information retrieval.
A related technical degree.

Nice To Haves

Experience with enterprise admin tooling, permission policies, or multi-tenant (Enterprise Grid) architectures.
Experience with feature flags, experimentation, and data-driven product development.
Experience with MCP or connector frameworks.

Responsibilities

Design and build backend services and API methods for administrator and user authentication and connection flows with Google and Microsoft, including 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 deliver features that increase connected-user and DWA adoption, using experiments and data to guide the roadmap.
Collaborate across Platform, Slackbot, Enterprise Search, and 3P Integrations on shared permission, authentication, and connector frameworks, including evolving 2.0 connectors toward MCP.
Contribute to high-impact team projects and own the long-term health of systems built.
Write secure, well-documented designs and work with Security through scoped review.
Help support and operations teams triage and resolve production issues.
Mentor engineers, conduct in-depth code reviews, and improve engineering standards, tooling, and processes.