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Etsy is seeking a Senior Software Engineer II, Machine Learning to join our Ads Marketplace engineering team. We help sellers grow their businesses by building algorithmic solutions that power Etsy's on-site advertising platform. Our work includes developing and productionizing systems that leverage machine learning, optimization, and algorithmic design to support real-time bidding, budget pacing, and audience targeting-driving efficient campaign performance at scale. You can learn more about our philosophies, tools, and some challenges we've tackled in our Code as Craft article that describes how we built our bidding system. There are hundreds of millions of products on Etsy. In this role, you will be responsible for developing data-driven techniques to optimize sellers' budgets according to their campaign performance goals by advertising their listings on surfaces where they perform the best. You will design and implement solutions including auto bidding, budget pacing optimizations, traffic forecasting, and measuring auction marketplace effects. This is a full-time position reporting to the Senior Engineering Manager. In addition to salary, you will also be eligible for an equity package, an annual performance bonus, and our competitive benefits that support you and your family as part of your total rewards package at Etsy.