API design (primarily with an API first approach) using API Blueprint and Swagger/Open API notations for both client engagements and open source projects.

We are using Apiary to design APIs that we offer to our customers, brokers, and partners for insurance products. We use the product in concert with the Oracle API Platform and surface (and style) the documentation in a custom JavaScript Dev Portal. The customer's developers leverage the mock resources, the documentation, code snippets, and attribute definitions.