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Senior 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 Senior Mobile Engineers with top early-stage startups that are shaping the future of technology, providing visibility into exclusive early-stage opportunities.

Requirements

  • Proficiency in Swift (iOS) and/or Kotlin (Android) for native development
  • Experience with cross-platform frameworks such as React Native, Flutter, or MAUI
  • Strong understanding of mobile UI/UX principles, animations, and accessibility best practices
  • Familiarity with REST APIs, GraphQL, WebSockets, and real-time data synchronization
  • Experience working with local storage (SQLite, Core Data, Room), cloud services (Firebase, AWS, GCP), and push notification frameworks
  • Proficiency in mobile app security practices, authentication (OAuth, JWT), and encryption techniques
  • Knowledge of CI/CD pipelines and mobile deployment tools (App Store Connect, Google Play Console, Fastlane)

Responsibilities

  • Design, develop, and maintain mobile applications for iOS, Android, or cross-platform solutions
  • Optimize performance, responsiveness, and security across mobile platforms
  • Build and maintain APIs, offline storage, and cloud integration for mobile applications
  • Work closely with UX/UI designers, backend teams, and product managers to create seamless experiences
  • Ensure applications follow best practices in mobile architecture, testing, and deployment
  • Implement automated testing, CI/CD pipelines, and monitoring solutions for mobile apps
  • Research and integrate new mobile technologies and frameworks to improve scalability and user experience

Other

  • Passionate about building high-performance mobile applications on iOS and/or Android
  • Excited about working with modern mobile frameworks and optimizing mobile experiences
  • 5+ years of experience in mobile application development for iOS and/or Android
  • Experience in early-stage startups or fast-paced product environments is a plus