Senior Staff Software Engineer, iOS Platform

Gusto

Senior Staff iOS Engineer architecting Gusto’s iOS platform and foundational mobile services. Improving infrastructure, scalability, and product experiences for over 500,000 small businesses.

Posted 9/10/2026full-timeSan Francisco • California • 🇺🇸 United StatesSenior💰 $223,000 - $278,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in Swift and iOS software engineering, with a strong focus on building and maintaining mobile infrastructure, including CI/CD and automated testing. Proven ability to mentor engineers and collaborate effectively across cross-functional teams to deliver high-quality mobile applications.

Highest-signal resume keywords

Swift ProgrammingIOS Software EngineeringMobile Infrastructure ManagementIOS Testing FrameworksMentoring and Team Building

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

IOS DevelopmentMobile Software EngineeringBuild PipelinesTesting AutomationRelease ProcessesPush NotificationsAccessibilityLocalizationGraphQLCI/CD

Soft Skills

Excellent CommunicationCritical ThinkingAttention to DetailSelf-Driven MindsetCollaboration

Tools & Technologies

Analytics ToolsMonitoring ToolsAutomated Testing Environments

Industry Keywords

Mobile App DevelopmentCross-Functional PartnershipsGreenfield ProjectsScalabilityPerformance

Tech Stack

Tools & technologies

GraphQLiOSSwift

About the role

Key responsibilities & impact

Architect, build, test, and refine Gusto’s iOS app and supporting embedded mobile web views
Utilize AI agents to deliver high-quality output quickly
Identify and advocate for best practices, architecture, and process
Enhance and maintain iOS mobile infrastructure, including build pipelines, testing automation, and release processes
Build and scale foundational services such as push notifications, accessibility, and localization
Develop, iterate, and improve product features integrating business functions, work tools, value-added services, and financial products
Collaborate with product management, design, and partner teams across product apps, identity, security, design systems, and infrastructure
Identify technical and customer pain points, brainstorm solutions, prototype, iterate, and launch solutions
Mentor other engineers and help build a strong mobile foundation for feature teams

Requirements

What you’ll need

Minimum of 10 years of experience in Swift and iOS software engineering
At least 12 years in mobile software engineering overall
Excellent communication skills and ability to build strong cross-functional partnerships
Self-driven mindset and ability to tackle greenfield projects
Proficiency in iOS testing frameworks and understanding of best practices
Experience developing platform components and common features that improve scalability, consistency, performance, and maintainability
Strong critical thinking and attention to detail
Willingness to learn continuously and passion for mentoring others
Experience delivering high-quality code across a diverse tech stack is a bonus
Experience with analytics and monitoring tools is a bonus
Experience with mobile infrastructure, including CI/CD, automated testing environments, and release orchestration, is a bonus
Strong knowledge of GraphQL is a bonus
Experience working at scale on apps spanning multiple teams and feature areas is a bonus

Benefits

Comp & perks

Competitive base pay
Health insurance
401(k)s
Equity (RSUs)
Hybrid work arrangement
Secure, reliable, and consistent internet connection required when working from an approved non-office location
Reasonable accommodations for qualified individuals with disabilities and disabled veterans