(Contractor) Senior Lead Flutter/Dart Mobile Engineer

At Sparq, we help companies solve the right problems-not just build more technology.

We’re a modern product engineering partner blending strategy, craftsmanship, and speed to help organizations modernize confidently in the age of AI. From data ecosystems to digital products and AI acceleration, we turn complexity into clarity and ideas into impact.

If you’re driven to build what’s next, lead with empathy, and deliver excellence without ego, you’ll feel right at home at Sparq.

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.
• Desire to work in a team environment
• Good interpersonal, written and verbal communication skills

Regardless of your specific role, we seek individuals who are excited to explore, adopt, and evangelize AI tools and methodologies. If you have experience in AI or a proven track record of rapidly learning and mentoring others on emerging tech, you’ll fit right in.

Equal Employment Opportunity Policy: Sparq is proud to offer equal employment opportunity without regard to age, color, disability, gender, gender identity, genetic information, marital status, military status, national origin, race, religion, sexual orientation, veteran status, or any other legally protected characteristic.

We are committed to providing equal employment opportunities and believe in an inclusive workplace. If you require reasonable accommodations to participate in the job application or interview process, please let us know by contacting [email protected]