Senior iOS Engineer

• Zūm is modernizing its iOS experience, and we’re looking for a Senior iOS Engineer to help drive that work. Our iOS surface area spans multiple apps — Driver, Parent, Student, School, and Charter — that need to feel like one coherent product, moving thousands of students, vehicles, and school districts through a real-time logistics network
• This isn’t a feature-factory role — you’ll be a key voice in setting the technical bar for iOS at Zūm
• You’ll work closely with our mobile lead, product, design, and engineering leadership on what the platform should look like, then help build the efforts that get us there
• Help own the architecture and technical roadmap for the iOS platform
• Contribute to modernization efforts that move the codebase toward a modern, scalable, shared platform underneath multiple apps
• Balance new feature delivery, legacy maintenance, and platform modernization work as we prepare the app for faster feature delivery
• Partner closely with our mobile lead, product, design, and engineering leadership on technical direction, and collaborate with mobile engineering partners on shared work
• Work across a wide surface area of APIs and services, bringing consumer-app polish to an operationally complex, enterprise-scale problem
• Help set the technical bar for iOS at Zūm: code quality, architecture patterns, and how the team approaches modernization
• Leverage AI tooling to accelerate development, improve code quality, and speed up modernization work
• Modernize legacy features of the app toward current SwiftUI patterns without stalling feature delivery
• Contribute to a shared platform layer that multiple Zūm apps (Driver, Parent, Student, School, Charter) can build on top of, instead of duplicating logic across codebases
• Rework how the app handles a large and growing surface area of APIs so the codebase stays maintainable as complexity increases
• Improve app performance and memory footprint, and build out telemetry/monitoring so the team can see how the app behaves in production
• Help identify which parts of the current app are worth keeping versus updating, and execute

Benefits

• Medical, dental and vision benefits, including paid membership to One Medical
• Unlimited vacation policy
• Free daily catered lunches + fully stocked kitchen at HQ
• Ability to have a huge impact at an early-stage, mission-driven startup
• Fun office culture and a team you would be proud to work with

• You’re a strong individual contributor who wants real influence over technical direction: architecture decisions, modernization strategy, and how the team approaches iOS engineering, while staying hands-on writing production code
• Strong, current command of Swift and SwiftUI; you’re living in modern iOS development
• Experience working in a complex, consumer-facing app environment (think feature-rich apps with a large user base vs. a narrow enterprise tool or an SDK)
• 5+ years of professional iOS engineering experience, with real depth
• A product-first orientation: comfortable with infrastructure work, but your track record is primarily product-driven
• Experience modernizing a legacy iOS app while it’s still shipping features (preferred)
• Experience owning meaningful parts of a consumer-facing app end-to-end, not just a single feature, page, or internal tool
• Experience partnering with an engineering leader or mobile lead on setting technical direction (preferred)
• Comfort contributing to architectural decisions and modernization efforts at scale
• Background at a company with a small-to-mid-sized mobile team, where you had real hands-on ownership (preferred)
• Domain experience in logistics, mapping, or fleet-style products
• Experience working across multiple related apps sharing common infrastructure or design systems