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"Tumblr has been on a very impressive run over the last several years, and few people can lay better claim to helping that happen than Marco Arment, the company's now ex-CTO and lead developer. His work was so foundational to the company that he was later named a co-founder.\r\n\r\nIn a short personal statement this morning, Marco announced that he will be leaving his active role at the company. He claims that he will maintain &amp;quot;an active consulting role&amp;quot; after his exit.\r\n\r\nMr. Arment pointed to his &amp;quot;independent career&amp;quot; as something that he wants to focus on. Given that his personal pet project Instapaper is a brilliant idea waiting in the wings, his desire to put more energy into it is hardly surprising.\r\n\r\nAccording to Marco, Tumblr is now a top 50 website in the US; handling that scaling curve must have been hard work indeed. I suspect that he will be missed. Pasted below is his full statement:\r\nAfter four years of my serving as Tumblr\u2019s lead developer, Tumblr\u2019s technical management needs have evolved to require types of experience that I don\u2019t have, and my independent career has offered a lot of opportunities that I haven\u2019t had the time to take full advantage of.\r\n\r\nWhile Tumblr\u2019s engineering team continues to grow, instead of continuing full-time, I\u2019ll serve an active consulting role.\r\n\r\nIt has been an invaluable experience to develop a product from just two users to one of the top 50 sites in the U.S., and I\u2019m looking forward to staying close to this incredible team."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/us/2010/09/21/tumblrs-lead-developer-stepping-aside-for-independent-projects/>