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	<title>Sayan Das &#8211; Noise</title>
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		<title>Transforming search at Delivery Hero: A migration journey to OpenSearch Service with radial search</title>
		<link>https://noise.getoto.net/2026/08/04/transforming-search-at-delivery-hero-a-migration-journey-to-opensearch-service-with-radial-search/</link>
		
		<dc:creator><![CDATA[Sayan Das]]></dc:creator>
		<pubDate>Tue, 04 Aug 2026 15:55:01 +0000</pubDate>
				<category><![CDATA[Amazon OpenSearch Service]]></category>
		<category><![CDATA[Customer Solutions]]></category>
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					<description><![CDATA[In this post, we walk through how Delivery Hero migrated their semantic search infrastructure to Amazon OpenSearch Service, why they chose radial search over traditional k-nearest neighbor (k-NN) search, and the optimizations that made the system fast, cost-effective, and flexible for experimentation.]]></description>
		
		
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