[lindvall]

If you're interested in other examples of this sort of solution, this is how Shopify has tackled this problem: https://github.com/tobi/imagery

It looks like tobi also has played around with porting it to go as well: https://github.com/tobi/imagery-go

[dqminh]

I tried to write an interface to ImageMagick's MagickWand in Golang as well to solve the same problem. You can find it here: https://github.com/dqminh/mage