•Improved the ranking algorithm at Amazon Gifting, a curated catalog of products designed to inspire gift ideas, by using Java and Spring
•Delivered code in a microservices-based model that dealt with data of millions of products, using the big data library Apache Spark and ElasticSearch, to rank them in their correct categories in AWS S3
•Aided in the ranking of products by implementing Thompson Sampling, an exploration/exploitation probability model, which brought less-popular products up in the rank
•Collaborated with a team of 9 on ideas for new ways of optimizing product ranking and curating
•Contributed to Correction of Errors during the peak, Q4, Thanksgiving period
•Led A/B-testing of the experiment which produced 3% increase in sales within 1 week after the end of the project, in key markets such as UK, Germany and France