I’ve just added a new post to my blog Online Database Expert which shows how to use Integromat to create Barcodes from Airtable records and then post the resulting barcode (or QR Code) image back into the Airtable record. You can see all of the posts relevant to Airtable (including the Bar-code one) here:
The site also include a members forum where you can ask database related questions and offer advice (including a specific section for Airtable users).