Senior Freelance Flutter Developer - Remote AI Projects

About the Role

We are seeking a Senior Freelance Flutter Developer to join our remote-first team at Toloka AI. This role is pivotal in building the next generation of our mobile platform, which is becoming a core part of our ecosystem. As a Senior Freelance Flutter Developer, you will help shape how mobile devices can be utilized to collect, process, and validate real-world data. You will work on products that are used by thousands of new experts joining every month, making a significant impact on our operations.

What You'll Do

• Define and drive the technical direction of the mobile platform across iOS and Android.
• Design and ship scalable, production-grade mobile applications used by tens of thousands of users weekly.
• Build advanced mobile features involving camera, video, audio, and sensor data.
• Develop solutions for real-world task execution and data collection on mobile devices.
• Support non-standard device usage scenarios and edge cases.
• Own the end-to-end delivery lifecycle: from idea and prototyping to production and iteration releases.
• Ensure reliability of critical user flows at scale on both App Store and Google Play.
• Improve performance, stability, and user experience across the mobile stack.

Requirements

• Strong experience with Android development (Java/Kotlin) and Flutter.
• Solid understanding of mobile architecture and design patterns.
• Hands-on experience with Flutter state management, networking, and API integration.
• Experience building and maintaining production-grade apps for Google Play and Apple App Store.
• Deep understanding of mobile performance optimization, multithreading, and async programming.
• Ability to work independently with ambiguous or loosely defined requirements.
• Good written and spoken English (B2 or higher) is a must for daily communication.

Nice to Have

• Familiarity with hybrid approaches (e.g., WebView integrations).
• Strong ownership mindset and ability to drive solutions end-to-end.

What We Offer

• Freelance collaboration via the Ontop freelance platform.
• Flexible, fully remote work schedule.
• Opportunity to work on highly innovative projects at the leading edge of AI development.
• Engage with a dedicated and dynamic team of experts.
• Work with customers that are AI industry leaders and well-known household names.