Senior Mobile Platform Engineer, iOS

Senior Staff Mobile Platform Engineer, iOS

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At Gusto, we’re on a mission to grow the small business economy. We handle the hard stuff—payroll, health insurance, 401(k) s, and HR—so owners can focus on their craft and customers. With teams in Denver, San Francisco, and New York, we’re proud to support more than 400,000 small businesses across the country, and we’re building a workplace that represents and celebrates the customers we serve.

We’re looking for Mobile iOS Engineers with 12+ years of experience who are passionate about creating amazing user experiences. In this role, you’ll dive into developing features that are not just functional but truly intuitive and enjoyable. You’ll take ownership of scaling our shared services while staying up to date with the latest in the iOS world. You’ll work closely with teams across Product, Identity, Security, System Design, and Infrastructure to build solutions that make a difference.

Our mobile team is at a pivotal moment with over 1M+ monthly active users and the recent launch of our employer experiences on mobile. We tackle real challenges faced by small business owners and their employees, and mobile is key to delivering impactful solutions. You’ll work alongside engineers and designers passionate about a seamless mobile experience.

• 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 product management, design, and partner teams to identify technical and customer pain points, prototype, iterate, and launch solutions.
• Work cross‑functionally with teams in product apps, identity, security, design systems, and infrastructure to deliver world‑class experiences directly to customers.
• 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—don’t just take our word for it; see what our customers have to say.

• A minimum of 8 years of experience in Swift and iOS software engineering, with at least 12 years in mobile software engineering overall; 4 years of Swift.
• 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.
• Proficiency in iOS testing frameworks and a solid understanding of best practices.
• Experience 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.
• A willingness to learn continuously and a passion for mentoring others on the team.

• Experience delivering high‑quality code across a diverse tech stack.
• Experience with analytics and monitoring tools to track app performance, health, and user engagement.
• Experience with mobile infrastructure: CI/CD, automated testing environments, and release orchestration.
• Building a strong mobile foundation that feature teams can build on top of.
• Mobile testing‑at‑scale.
• Strong knowledge of Graph
  
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• Experience working at scale on apps that span multiple teams and feature areas.

Our cash compensation for this role is targeted at $223,000–$265,000 for San Francisco & New York and $189,000–$225,000 for Denver. Final offer amounts are determined by multiple factors including candidate experience and expertise and may vary from the amounts listed above.

Gusto has physical office spaces in Denver, San Francisco, and New York City. Employees based in those locations are expected to work from the office on designated…