About the role

Role Overview

As a Senior Mobile Engineer, you will design, develop, and maintain cross-platform mobile applications for iOS and Android, delivering high-quality, accessible mobile user experiences.

Responsibilities

Build and maintain cross-platform mobile apps for iOS and Android
Integrate mobile apps with backend services and capabilities, including:
- Backend APIs
- Authentication services
- Push notifications
- Real-time data synchronization
Manage the mobile release lifecycle:
- Testing and deployment
- App store submissions
- Production monitoring
Implement secure local storage, offline capabilities, and reliable application performance
Conduct code reviews, mentor team members, and promote mobile engineering best practices

Requirements

8+ years of professional mobile application development experience
3+ years of hands-on Flutter and Dart experience delivering production applications
Experience publishing and maintaining apps in the Apple App Store and Google Play Store
Experience with mobile CI/CD, automated testing, code signing, and deployment
Strong understanding of mobile architecture, state management, and scalable application design patterns
Knowledge of native iOS (Swift) and Android (Kotlin) development concepts

Nice-to-Haves

Not explicitly stated (role focuses on Flutter/Dart plus strong iOS/Android fundamentals).

About Haystack

Haystack is a technology staffing and solutions company that places skilled professionals into high-demand roles across multiple industries. It partners with organizations to deliver talent for software engineering needs, including mobile development roles.