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Senior Software Engineer

Fountain

seniorpermanentfullstack San Francisco County, CA 75 days ago via LinkedIn

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Tags

ReactTypeScriptNode.jsExpressMongoDBREST APIsPerformance OptimizationAgileB2B SaaSSystem Architecture

About the role

Role: Senior Software Engineer

Join Fountain to build user-centered web applications that help organizations improve employee retention.

Responsibilities

  • Design, develop, test, and maintain product features and enhancements
  • Collaborate with product and design teams to deliver features
  • Review and collaborate on other developers’ work
  • Implement RESTful API endpoints and build functionality in the Express/Node.js backend
  • Extend and evolve the MongoDB data model
  • Ensure quality, reliability, operations, and security across products
  • Identify and address performance bottlenecks and optimize for speed, scalability, and usability
  • Stay current with industry trends and continuously improve user experience

Requirements

  • 5+ years of full-stack software engineering experience
  • Proven product-oriented software development background
  • Must have proficiency with:
    • React
    • TypeScript
    • MongoDB
    • Express (must have)
  • Strong problem-solving skills and critical thinking about user interactions and system architecture
  • Ability to work independently in dynamic situations with limited information
  • Excellent written and verbal English communication

Nice to have

  • Experience in B2B SaaS and/or remote international settings
  • Familiarity with event-driven, serverless, high-volume architectures, API strategies, micro-services, and web security
  • AWS experience
  • Agile methods and experience working in Agile environments
  • Testing/tools experience with Vitest/Jest and Playwright (mentioned under tools/requirements)

About Fountain

Fountain provides an enterprise, automated and customizable platform for frontline workforce management. It delivers a seamless applicant experience for workers while helping organizations scale and manage frontline talent. The company serves hundreds of customers globally and supports hiring, onboarding, and workforce management at large scale.

Scraped 7/11/2026