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RainRainNew York, NY

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.

Salary not listed
Hybrid4+ YOEiOS Engineering

About the role

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

SwiftUikitSwiftUICombineCore DataREST APIsFastlaneXcode CloudBitriseWkwebview

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