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Senior Software Engineer

Fountain

seniorpermanentfullstackbackend San Francisco, CA 77 days ago via LinkedIn

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Tags

ReactTypeScriptNode.jsExpressMongoDBREST APIsFull-StackPerformance OptimizationAgileB2B SaaS

About the role

Role Overview

As a Senior Software Engineer at Fountain, you’ll build user-centered web applications that help organizations improve employee retention. You’ll work with engineers, designers, and product managers across product squads that independently own product health and market fit.

Responsibilities

  • Design, develop, test, and maintain product features and enhancements
  • Collaborate with product and design teams to bring features to life
  • Review and collaborate on other developers’ work
  • Implement RESTful API endpoints and build new functionality in the Express/Node.js backend
  • Extend and work with the MongoDB data model
  • Ensure quality, reliability, operations, and security of products
  • Identify and resolve performance bottlenecks; 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
  • Proficiency with modern technologies, including:
    • React
    • TypeScript
    • MongoDB
    • Express (must-have)
  • Strong problem-solving skills and ability to think critically about user interactions and system architecture
  • Ability to work independently with ambiguity and limited information
  • Excellent communication skills in English

Nice to Have

  • Experience in B2B SaaS startup environments and remote international teams
  • Familiarity with event-driven, serverless, and high-volume architectures
  • Experience with microservices, API strategies, web security, and Agile
  • Testing experience with Vitest/Jest and Playwright
  • Familiarity with event-driven/serverless/high volume systems and AWS
  • Experience with Ruby on Rails

Location / Collaboration

  • Role requires collaboration across a globally distributed organization across multiple regions and time zones.

About Fountain

Fountain provides an enterprise workforce management platform for frontline hiring and talent operations. Its customizable automation improves the applicant and worker experience while helping organizations scale and manage large frontline workforces globally. The company serves customers across multiple industries and operates at global scale.

Scraped 7/8/2026