Scaling AI training data collection to 250K+ contributors

The challenge

Defined.ai needed to scale their AI training data collection platform to handle 250,000+ contributors worldwide. The existing system couldn't handle the volume, and onboarding, task assignment, and quality control were becoming bottlenecks.

The solution

We rebuilt the contributor platform with a new onboarding flow, a task-matching engine that assigns work based on contributor expertise, and automated quality control that flags low-quality data for review. The platform handles mobile and web contributors across multiple languages.

The impact

The platform now supports 250,000+ contributors with significantly improved data throughput and quality. Contributor retention improved with the better UX.

Technologies used