(Contractor) Senior Lead Flutter/Dart Mobile Engineer

C2C is not available

Must be authorized to work in the U.S. without sponsorship

A Day in the Life:

• Design, develop, and maintain production-grade mobile applications using Flutter and Dart, with a focus on reliability, performance, and offline functionality.
• Lead the development of a shared offline package that supports local caching, queued operations, background synchronization, and connectivity state management.
• Integrate shared offline capabilities into Workforce Tools and WFHQ, ensuring consistent functionality and data handling across both applications.
• Implement local data persistence and background synchronization strategies that allow applications to function reliably during intermittent or extended periods of lost connectivity.
• Develop offline-first conflict resolution strategies to manage data synchronization, maintain data integrity, and address discrepancies between locally stored and server-side information.
• Build intuitive data-age indicators and safeguards that prevent users from performing unsafe actions when application data is stale or connectivity is limited.
• Leverage hands-on experience with Claude and Claude Code to support mobile development, troubleshooting, code optimization, and testing activities.
• Develop and execute comprehensive unit and integration tests covering offline functionality, application restarts, synchronization recovery, and extended offline scenarios.
• Validate application performance and reliability across various devices and operating system versions, identifying and resolving compatibility issues.
• Provide technical leadership through code reviews, troubleshooting, and collaboration with engineering teams to deliver scalable, maintainable mobile solutions.

What it takes:

• Consultative approach and problem solving skills to successfully align digital solutions with long-term business goals of the client
• Hands-on experience using AI tools to enhance daily work, or a strong desire to do so, including a willingness to experiment, learn, and champion AI adoption within your role
• Claude Certified Developer or Architect highly preferred; possible opportunity to obtain as a Sparq colleague
• Commitment to understanding and exceeding client expectations
• Ability to perform project oversight and execution of deliverables
• Flexibility to adapt within a high-growth organization
• Ability to lead, mentor and motivate those around them
• Hunger for continuous learning and professional development
• Intellectual curiosity to provide creative solutions
• Full understanding of the software development life cycle
• Ability to positively impact fellow colleagues through effective leadership, presentations, coaching, etc.