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Staff Mobile Engineer (iOS or Android) - VC Backed Startups

SignalFire

Salary not specified
Nov 4, 2025
New York, NY, US
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SignalFire is looking to connect exceptional Staff Mobile Engineers with top early-stage, VC-backed startups that are shaping the future of technology across various sectors. The goal is to provide these startups with access to experienced mobile development talent for leading mobile development efforts and scaling applications.

Requirements

  • Deep expertise in Swift (iOS) and/or Kotlin (Android) for native app development
  • Experience with cross-platform frameworks like React Native, Flutter, or MAUI
  • Strong knowledge of mobile UI/UX principles, animations, and accessibility
  • Familiarity with state management libraries (Jetpack Compose, SwiftUI, Redux, MobX)
  • Hands-on experience integrating cloud services (Firebase, AWS, GCP) and local databases (Core Data, Room, Realm, SQLite)
  • Proficiency in mobile security best practices, authentication (OAuth, JWT), and encryption techniques
  • Strong understanding of automated testing frameworks (XCTest, Espresso, Detox, Cypress)

Responsibilities

  • Architect, design, and develop scalable, high-performance mobile applications
  • Own and optimize mobile performance, security, and reliability
  • Lead efforts in mobile API integrations, cloud storage solutions, and data synchronization
  • Work with backend teams to create efficient REST, GraphQL, and WebSocket APIs
  • Guide and mentor junior engineers, establishing best practices for mobile development
  • Define and maintain mobile CI/CD pipelines, testing strategies, and release processes
  • Research and integrate emerging mobile technologies to keep applications cutting-edge

Other

  • Passionate about building and optimizing mobile applications for scalability, performance, and user experience
  • Experienced in leading mobile projects, mentoring engineers, and defining technical roadmaps
  • Excited about native (Swift/Kotlin) and cross-platform (React Native, Flutter) development
  • 6+ years of experience in mobile development for iOS and/or Android
  • Proven leadership in technical strategy, architecture, and mentoring engineers