Consider UltiSnips or NeoSnippet

[lfilho]

Seems like the deoplete supports UltiSnips snippets in its completion... So might worth the change
https://github.com/SirVer/ultisnips

[lfilho]

More research:

https://www.reddit.com/r/neovim/comments/4st4i6/making_ultisnips_and_deoplete_work_together_nicely/

Shougo/deoplete.nvim#470

Shougo/neosnippet.vim#365

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Seems like that UltiSnips have some bugs with neovim still (as of this date).
Maybe neosnippet (also from Shougo) will be better but he said he's working on an even better one, specific for nvim: https://github.com/Shougo/deoppet.nvim