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 applications for iOS and Android
Integrate mobile apps with backend APIs, authentication services, push notifications, and real-time data synchronization
Own the mobile release lifecycle: testing, deployment, app store submissions, and production monitoring
Implement secure local storage, offline capabilities, and ensure reliable application performance
Perform code reviews, mentor team members, and promote mobile development best practices

Requirements

8+ years of professional mobile application development experience
3+ years hands-on experience with Flutter and Dart, shipping 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 processes
Strong understanding of mobile architecture, state management, and scalable design patterns
Knowledge of native iOS (Swift) and native Android (Kotlin) concepts

Nice to Have

Not explicitly stated (but mentoring and best-practice leadership are emphasized).

About Haystack

Haystack is a technology staffing and solutions company that places skilled professionals into high-demand roles across a range of industries. The company focuses on connecting talent with organizations needing specialized engineering and product expertise.