Hey @Joyo,
Yes, with juce you can build lv2 plugins, but there is an issue with this.
See Hosting LV2s for a more detailed discussion about using lv2 plugins in zynthian.
IIRC, jofemodo is working on the juce lv2 plugin integration, but it is still not available/ready.
Meanwhile you could use DPF as a framework perhaps?
Regards