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Explore the journey of creating and scaling a new classified experience in this 28-minute conference talk from WeAreDevelopers Conference 2017. Delve into the challenges faced and solutions implemented to attract millions of users. Learn about the initial use of MongoDB, the implementation of circular filters, and the eventual switch to Elastic Search for improved performance. Gain insights into the decision-making process behind choosing optimal search technologies and strategies for handling large-scale user bases. The presentation concludes with a summary of key learnings and includes a Q&A session for further discussion.