Why This Job is Featured on The SaaS Jobs
This Senior Staff iOS Platform role stands out in SaaS because it focuses on the shared foundations that keep a customer-facing mobile product coherent as usage grows. The remit spans platform services, release and testing infrastructure, and cross-team interfaces, which are the parts of a SaaS mobile surface area that determine reliability and iteration speed over time. With Gusto referencing a large active user base and a renewed employer mobile experience, the work appears anchored in a mature product where platform decisions have immediate downstream impact.
For a long-term SaaS engineering trajectory, platform ownership is a durable advantage. Building reusable components, strengthening CI and automated testing, and shaping architecture across multiple feature areas develops instincts that translate across subscription products: maintaining quality under frequent releases, designing for observability, and balancing product delivery with foundational investment. The role also signals meaningful exposure to adjacent domains common in SaaS mobile programs, including identity, security, and design systems.
This position best fits an engineer who prefers leverage over isolated feature delivery and is comfortable influencing through technical standards and collaboration. It suits someone operating at staff level who enjoys mentoring, navigating tradeoffs, and turning ambiguous platform needs into pragmatic roadmaps within a multi-team SaaS environment.
The section above is editorial commentary from The SaaS Jobs, provided to help SaaS professionals understand the role in a broader industry context.
Job Description
About the Role
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!
About the Team
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!
Here’s what you’ll do day-to-day:
- 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.
Here’s what we're looking for:
- 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.
Bonus points:
- 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.
