What are some best practices and valuable tips for HubSpot developers when it comes to building custom integrations or creating tailored solutions for clients using the HubSpot platform?
Hi @GGlowing,
Thank you for reaching out to the Community!
I’d like to invite a couple of subject matter experts to this conversation @johnelmer, @louischausse and @Jerdaine_digita do you have tips and best practices to share with @GGlowing, please?
Also, if anybody else has anything to add and/or share, please feel free to join in the conversation 
Thanks and have a lovely day!
Best,
Bérangère
@GGlowing I highly recommend checking out the Developer Blog and Developer YouTube, specific to custom integrations and tailored solutions:
Kickstarting your HubSpot Developer journey
Intro to React for Devs, Creating your first react card, and 2X videos from INBOUND about extensibility
Reducing HubSpot Requests (batch API)
Building a HubSpot App - start to finish 3X video series from Aptitude 8
Hope this helps get you started!