Cross Platform Productivity App Development

I'm looking for a seasoned app developer with expertise in iOS and Android platforms to help me kick-start the first phase of a cross-platform productivity app. The primary functionality of this app will be task management.

Key Responsibilities:
- Develop a user-friendly, efficient task management interface
- Ensure seamless performance across both iOS and Android platforms
- Incorporate best practices for cross-platform app development

Ideal Skills:
- Proficient in iOS and Android app development
- Strong background in creating productivity apps
- Expertise in task management system design
- Prior experience with cross-platform development

Please only apply if you have a portfolio showcasing relevant past projects.