Modular JavaScript Database Prototype

I'm seeking an experienced developer to build a lightweight, custom database prototype in JavaScript, specifically designed for managing organizational hierarchies.

Key Requirements:
- Support for nested/recursive data structures
- Modular architecture for scalability and future enhancements
- High data consistency is crucial

Ideal Skills:
- Proficiency in JavaScript
- Experience with custom database development
- Strong understanding of modular system design
- Expertise in maintaining data consistency

Please provide examples of similar work.