Advanced PubMed API for Healthcare SaaS App

I’m in search of a skilled API developer who can create a feature-rich PubMed API for a healthcare application I'm working on. The initial MVP is SaaS with advertising for the health consumer market.
The ideal candidate will possess:

- Expertise in API development
- Experience with PubMed or similar platforms
- Proficiency in JSON and XML for data format
- Experience with Node/Edge Graph display for visual navigation

This project is an implementation of Araicom's Associative Relevancy and other patents for knowledge domain frameworks and Perspectives for visualization, navigation, and curation of users, instances, and group networking. Specifically, I need the API to allow:

- Search functionality
- Retrieval of article metadata
- Access to full-text articles
- Access to PubMed Filter and MeSH concepts
- Visualization similar to www.biocaid.com
- Knowledge of UMLS a plus

This is a preliminary search for expertise, and the rest of the project details will follow. Your understanding of the scope informs this crucial phase of the project.