Senior Staff Software Engineer, iOS Platform

Gusto•San Francisco, NY

2d•Hybrid

About The Position

We’re on the lookout for talented Mobile iOS Engineers with 12+ years of experience who have the expertise to help guide our mobile efforts. In this role, you’ll have the chance to dive into developing the foundation upon which our mobile apps are built. We want you to take ownership of scaling our shared services while keeping up with the latest in the iOS world. You’ll work closely with teams across Product, Identity, Security, System Design, and Infrastructure, collaborating to build solutions that really make a difference. If you’re excited about building elegant, scalable apps and being part of a supportive, innovative mobile team, we’d love to hear from you! At Gusto, we’re excited to be at a pivotal moment in our journey with over 1M+ monthly active users and the recent launch of our employer experiences on mobile. Our mission is to tackle the real challenges faced by small business owners and their employees, and we believe that mobile is key to delivering impactful solutions. As part of our mobile team, you’ll be at the forefront of this transformation, working alongside talented engineers and designers who are passionate about creating a seamless mobile experience. Together, we’re building a platform that empowers everyone—small business owners and their teams—to thrive. If you’re ready to make a difference in the mobile landscape at Gusto, we want you on board!

Requirements

A minimum of 10 years of experience in Swift and iOS software engineering, with at least 12 years in mobile software engineering overall.
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 in developing platform components and common features that enhance scalability, consistency, performance, 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 in the organization.

Nice To Haves

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, for example: 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 GraphQL.
Experience working at scale on apps that span multiple teams and feature areas.

Responsibilities

Architect, build, test, and refine Gusto’s iOS app, along with supporting embedded mobile web views that enhance user experience.
Utilize AI agents as a multiplier to deliver high-quality output quickly.
Identify and advocate for best-practices, architecture and process.
Enhance and maintain our iOS mobile infrastructure, including build pipelines, testing automation, and the release process, to ensure smooth operations.
Build and scale essential, foundational services, such as push notification systems, accessibility and localization features, to enhance app functionality.
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 in product apps, identity, security, design systems, and infrastructure to identify technical and customer pain points, brainstorm solutions, and then prototype, iterate, and launch those solutions.
Create a product that our customers truly love—don’t just take our word for it; see what our customers have to say.