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Senior Staff Mobile Platform Engineer, iOS

Gusto

$189,000 - $265,000
Oct 14, 2025
San Francisco, CA, US • Denver, CO, US • New York, NY, US • Remote, US
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Gusto is looking to solve the problem of creating amazing user experiences for small business owners and their employees by developing features that are functional, intuitive, and enjoyable, and by scaling shared services while keeping up with the latest in the iOS world.

Requirements

  • A minimum of 8 years of experience in Swift and iOS software engineering, with at least 12 years in mobile software engineering overall. Minimum 4 years of Swift.
  • Proficiency in iOS testing frameworks and a solid understanding of best practices.
  • Experience in developing platform components and common features that enhance scalability, consistency, and maintainability throughout the product development lifecycle.
  • Strong critical thinking abilities and a keen attention to detail.
  • Experience delivering high-quality code across a diverse tech stack.
  • Experience with analytics and monitoring tools to track app performance / health and user engagement.
  • Strong knowledge of GraphQL.

Responsibilities

  • Architect, build, test, and refine Gusto’s iOS app, along with supporting mobile web views that enhance user experience.
  • Develop, iterate, and improve product features that integrate core business functions, work tools, value-added services, and financial products.
  • Collaborate closely with our product management, design, and partner teams to identify technical and customer pain points, brainstorm solutions, and then prototype, iterate, and launch those solutions.
  • Work cross-functionally with teams in product apps, identity, security, design systems, and infrastructure to deliver world-class experiences right into our customers' hands.
  • Build and scale essential services, such as push notification systems and localization features, to enhance app functionality.
  • Enhance and maintain our iOS mobile infrastructure, including build pipelines, testing automation, and the release process, to ensure smooth operations.
  • Create a product that our customers truly love

Other

  • Excellent communication skills and a knack for building strong cross-functional partnerships.
  • A self-driven mindset with the ability to tackle greenfield projects and bring innovative ideas to life.
  • A willingness to learn continuously and a passion for mentoring others on the team.
  • Ability to work from the office on designated days approximately 2-3 days per week (or more depending on role).
  • Secure, reliable, and consistent internet connection is required when working from a location other than a Gusto office.