Hey Martin B.,
I'm Muhammad, a PHP, JavaScript, Laravel and React.js expert with 10+ years of experience. As you need some fixes for your WordPress theme and a little HTML code I can use when writing on the site, I would be the best fit for this job due to my skillset.
I have extensive knowledge in PHP, JavaScript, Laravel and React.js which enables me to craft tailor-made solutions that harmonize with best practices as well as offer post-project support. Additionally, I am experienced in HTML, CSS, Bootstrap, jQuery which makes it easy for me to work on your site's background pictures and picture resizing functionality. With this knowledge in hand, you won't have to worry about any technical issues as well as get access to other necessary service such as website performance optimization through optimized page layouts and reduced opacity on the website so that it does not take up too much screen space but still looks good at the same time.