Full-Stack PHP Developer for Website Optimization & Future Development

I have an existing website built with custom PHP, and I am looking for an experienced full-stack developer who can help optimize some pages of the website for the website speed and performance. This will initially be a small optimization task to evaluate your full-stack development skills and the quality of your work. If the initial task goes well, I have future plans for long term ongoing work to add new website functionality and third-party integration.