PHP Lavarel Expert in LangChain, Pinecone, and OpenAI technology

We are looking for a PHP Laravel expert who has experience working with LangChain technology. Our primary goal is to improve an existing application, so we need someone who has a deep understanding of Pinecone and OpenAI as well. We have no preference for project management style or communication method. Ideal skills and experience for the job include:

- Expertise in PHP Laravel and LangChain technology
- Deep understanding of Pinecone and OpenAI technology
- Experience in improving existing applications
- Strong communication skills and ability to work collaboratively.

PHP Developer who has worked on LangChain, Pinecone, and OpenAI technology. An expert familiar with building similar platforms like askyourpdf.com (This application lets you chat with any PDF document you upload.). The application uses artificial intelligence to analyse the content of the PDF document and provide a chat interface for users to ask questions and get answers. Users can upload multiple documents supports the following document extensions: '.pdf', '.txt', '.ppt', '.pptx', '.csv', '.epub', '.rtf'

I want the interested developers to provide a sample of a project they have created similar to this.