Codeigniter Developer for Optimization Project

I'm looking for a skilled Codeigniter developer who can assist with optimizing my existing code. While the main focus is on improving the user interface, the tasks will also involve enhancing the backend and database management aspects.

Task addition error: Error 500 internal server error when adding tasks.


Order place issue: Order can not be placed in the store


Proposal Items refection: Every item added in proposal are reflecting in store


Proposal Pdf Issue: Proposal PDFs do not open properly on laptops and generate an internal error when opening pdf.


Machine Data Addition: Machine data cannot be added


PO number reflection: PO Number not reflecting in Proposals.


Store format requirement: Store need to be in one standard format.

Key Responsibilities:
- Frontend Development: Enhance the user interface to make the application more visually appealing and user-friendly.
- Backend Development: Optimize code logic and structure for better performance and maintainability.
- Database Management: Improve database interactions for smoother data handling.

Ideal Candidate:
- Proficient in Codeigniter: Proven experience working with the Codeigniter framework.
- Strong Frontend Skills: A solid understanding of frontend technologies such as HTML, CSS, and JavaScript to enhance user interface.
- Backend Expertise: Skilled in backend development to optimize code logic and structure.
- Database Management: Experience in managing and optimizing database queries and interactions.

Please provide examples of prior projects that showcase your optimization and Codeigniter skills.