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      <title><![CDATA[Design a News Feed]]></title>
      <link>https://intervueclub.com/problems/databases/design-a-news-feed</link>
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      <description><![CDATA[System design deep dive: Design a News Feed. Difficulty: hard. Category: Databases. Tags: fan-out, caching, social-graph, pagination, ranking, kafka, redis.]]></description>
      <pubDate>Fri, 12 Jun 2026 00:00:00 GMT</pubDate>
      <category><![CDATA[Databases]]></category>
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      <title><![CDATA[Design a Rate Limiter]]></title>
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      <description><![CDATA[System design deep dive: Design a Rate Limiter. Difficulty: medium. Category: Databases. Tags: rate-limiting, distributed-systems, redis, algorithms, api-design.]]></description>
      <pubDate>Thu, 02 Jul 2026 00:00:00 GMT</pubDate>
      <category><![CDATA[Databases]]></category>
      <author><![CDATA[]]></author>
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      <title><![CDATA[Design a URL Shortener]]></title>
      <link>https://intervueclub.com/problems/databases/design-a-url-shortener</link>
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      <description><![CDATA[System design deep dive: Design a URL Shortener. Difficulty: easy. Category: Databases. Tags: hashing, caching, read-heavy, id-generation.]]></description>
      <pubDate>Fri, 03 Jul 2026 00:00:00 GMT</pubDate>
      <category><![CDATA[Databases]]></category>
      <author><![CDATA[]]></author>
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      <title><![CDATA[Design Ticketmaster]]></title>
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      <description><![CDATA[System design deep dive: Design Ticketmaster. Difficulty: hard. Category: Real-time Systems. Tags: distributed-locking, concurrency, booking, consistency, queuing, redis.]]></description>
      <pubDate>Thu, 02 Jul 2026 00:00:00 GMT</pubDate>
      <category><![CDATA[Real-time Systems]]></category>
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      <title><![CDATA[Design WhatsApp]]></title>
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      <description><![CDATA[System design deep dive: Design WhatsApp. Difficulty: hard. Category: Real-time Systems. Tags: messaging, websockets, real-time, fan-out, kafka, cassandra.]]></description>
      <pubDate>Thu, 02 Jul 2026 00:00:00 GMT</pubDate>
      <category><![CDATA[Real-time Systems]]></category>
      <author><![CDATA[]]></author>
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      <title><![CDATA[Design Dropbox]]></title>
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      <description><![CDATA[System design deep dive: Design Dropbox. Difficulty: hard. Category: Storage. Tags: file-storage, sync, chunking, deduplication, consistency, s3.]]></description>
      <pubDate>Thu, 02 Jul 2026 00:00:00 GMT</pubDate>
      <category><![CDATA[Storage]]></category>
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