Real time recommendation system for Snapchat short videos feeds .

• Product scale: ranking 10 million video candidates for 50 million DAU.

• Responsible for feature/signal generations for multiple tiers models.

• Improved multi stage ranking stacks to boost user engagements. Lifted global total

view time through various projects.

• Improved the videos feed responsiveness to user's inputs from days to seconds.

• Delivered key products including Automatic Price Reduction, Promoted Listings, and Best Offers

• Maintained major back-end applications serving 25 million sellers around the world

• Developed multiple large-scale data processing pipelines handling million transactions daily

• Made significant business impacts and drove GMV and conversion rate uptake with above products