iOS Engineer
Lead iOS Engineer owning full mobile development lifecycle, building production apps integrating with payment APIs, architecting scalable codebases, and collaborating with product/design teams at a fintech startup. Requires 4-10 years experience with Swift and Apple's frameworks.
About the job
Responsibilities
- Own the entire iOS development lifecycle, from architecture and implementation to App Store delivery
- Build polished, production-grade mobile apps that leverage Rain's issuance platform and APIs for clients and their end users
- Collaborate closely with product, design, and backend engineers to define the mobile roadmap and translate platform capabilities into intuitive native experiences
- Architect a clean, scalable codebase that can serve as the foundation as the mobile team grows
- Integrate with Rain's APIs for card issuance, transaction management, balance queries, and other payment flows
- Implement secure authentication, tokenization, and data handling appropriate for a financial services context
- Drive decisions on tooling, frameworks, CI/CD, and testing strategy for mobile
- Contribute to the broader engineering culture as an early team member with outsized influence on how we build
Requirements
- 4–10 years of professional mobile development experience, with multiple apps shipped to the App Store
- Proficiency in Swift and deep familiarity with Apple's frameworks (UIKit, SwiftUI, Combine, Core Data, etc.)
- Experience architecting iOS apps from scratch (project structure, navigation patterns, state management, dependency injection)
- Solid understanding of networking layers, RESTful API integration, and secure data handling
- Disciplined approach to code quality: testable code, code review, maintainability
- Comfort working autonomously with minimal direction
- Strong product sensibility and excellent communication skills
Nice-to-Haves
- Experience in fintech, payments, or crypto/web3
- Familiarity with card issuance, wallet UX, or financial transaction flows
- Experience with WKWebView-based hybrid architectures or embedded SDK patterns
- Background in building white-label or multi-tenant mobile experiences
- Exposure to CI/CD tooling for iOS (Fastlane, Xcode Cloud, Bitrise, etc.)
- Experience being the first or early mobile hire at a startup
Skills
Swift, Uikit, SwiftUI, Combine, Core Data, REST APIs, Fastlane, Xcode Cloud, Bitrise, Wkwebview
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