OnApp - <a href="http://onapp.com" > - London, UK
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OnApp is all about helping service providers build their own public clouds. We build software that helps hosting companies compete against Amazon by providing a turn key Cloud and CDN platform.
We have more than 500 individual hosting providers running our software and we want to cluster them all to bring a compute federation so users can spin up a cloud server of any scale anywhere in the world. We've already done this for the CDN market: <a href="http://onapp.com/platform/onapp-cdn/" >
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Our dev stack comprises of Rails, Git, Postgres, Redis and Ansible but there's plenty of other technologies being used like Python, C++, Java, MySQL and more.
We are actively looking for Rails Developers for our London office to help us develop the OnApp Compute Marketrplace. If you are interested, email me directly: REDACTED_EMAIL