Mobile Application Developer (iOS + Android)

Mobile Application Developer (iOS + Android)
Location: Philadelphia, PA (Onsite - No hybrid/remote) local only
Duration: 6+ month contract | Likely extension to 12+ months

GC/USC
Job Overview

We are seeking a skilled Mobile Application Developer to join a growing team in Philadelphia, supporting the next version (V3) of a high-visibility public-facing mobile app. This hands-on role requires experience across iOS and Android platforms, proficiency in Kotlin shared modules for cross-platform development, and a strong focus on performance, functionality, and user experience. Candidates with UI/UX design experience will have an advantage.
Key Responsibilities

• Design, develop, and enhance mobile applications for iOS and Android platforms.
• Utilize Kotlin shared modules for cross-platform code efficiency and maintainability.
• Collaborate closely with product managers, designers, and QA teams to implement new features.
• Perform thorough testing, debugging, and performance optimization for mobile apps.
• Ensure apps remain compatible with latest iOS and Android OS releases.
• Contribute to UI/UX design discussions, suggesting improvements and implementing best practices.
• Maintain clean, well-documented code and version control using GitHub.
• Stay current with emerging mobile technologies and trends, and incorporate them where applicable.

• 3-5+ years of experience in mobile app development for iOS and Android.
• Proficiency in Swift, Kotlin, and Java.
• Experience with Git/GitHub for version control.
• At least one published mobile app available for review.
• Strong understanding of mobile performance optimization, memory management, and best practices.
• Ability to work onsite in Philadelphia; remote or hybrid arrangements are not available.

• Experience with cross-platform development frameworks or Kotlin multiplatform projects.
• Hands-on UI/UX design experience or working knowledge of mobile design principles.
• Familiarity with agile development methodologies and CI/CD pipelines for mobile apps.
• Experience in troubleshooting app crashes, profiling, and optimizing battery/performance.