Java compiler code Expert

I'm in need of a Java whiz to help boost the performance of my codebase. Although the codebase is small and simple, I need someone with a sharp eye for detail who can carefully comb through every line of code and make necessary adjustments to enhance its efficiency.

Work Description:
- Carry out a comprehensive performance audit of my current Java codebase.
- Apply appropriate strategies and techniques to optimize for improved performance.

Skills and Experience:
- Java coding and debugging expertise.
- Proven experience in optimizing Java codebases, particularly those of small to medium scale.
- A good understanding of code performance factors and how to manipulate them for maximum efficiency.
- Strong problem-solving skills with an analytical mindset.

Please note that due to the nature of this project, I would need to see a portfolio detailing your prior experience with Java and code optimization. Kindly attach this with your bid.