"Integrate" is such a vague word which could mean simply grabbing a simple dataset or something significantly larger so without further information, it is really hard to say. However, we have REST and GraphQL APIs plus Webhooks so there are certainly ways to get data out/back in and perform actions when something happens on your community. For more, you can point your developer to our Developer Resources: https://invisioncommunity.com/developers/
Theoretically, they could even extend some functionality of those items, if they do not fully meet your needs, via a third party application/plugin so lots of choices.