My question is pretty simple but I don\'t find a proper way (I mean not use absolute positionning of sub elements inside a relative position container) to achieve this in Bo
Use ml-auto to push the buttons to the right...
https://codepen.io/anon/pen/evbLQN
Another option is to remove the btn-group from the col-md-4, and then float-right will work as expected. The pull-right class was replaced by float-right in Bootstrap 4.
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PS - To prevent the horizontal scrollbar visible in your Codepen, make sure the .row is placed inside a container-fluid. Also, generally col-* are used to contain content, and shouldn't be applied to other components/elements. So, for example if you wanted to use the btn-group..
http://www.codeply.com/go/8OYDK5D8Db
Related: Right align element in div class with bootstrap 4