Spring Core Assistance

I need a Spring Core expert for my project. I have some unanswered questions regarding Dependency Injection, Aspect-Oriented Programming, and Bean Definition. Your task would also involve improving code maintainability and simplifying configuration management. The application I'm building is an Enterprise Application.

Ideal skills include:
- Extensive experience with Spring Core
- Strong understanding of Dependency Injection, Aspect-Oriented Programming, and Bean Definition
- Ability to improve code maintainability
- Expertise in simplifying configuration management
- Experience in building Enterprise Applications