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Mongo for storing notifications. MySQL for non intensive things. We developed the backend on our own. ps. I'm a BIG fan of huginn and your work. We studied it and had a very interesting discussion on moving everything to your platform, but we already had a mature version of our backend when we found it and we are not rubyists. I can remember writing on twitter something like "We have hit the open source jackpot". Sai…
Awesome! It might be useful for you. Send me a note if you have any questions.
Thanks! I'll be in touch