Cleaning d'un site web en freelance

Bonjour,

Je gère un site web qui a de mauvaises performances dans le temps de chargement.
Je cherche une personne qui pourra nettoyer le site de tout le contenu non nécessaire pour optimiser les points suivants:

Remove unused JavaScript
Eliminate render-blocking resources
Reduce initial server response time
Remove unused CSS
Serve images in next-gen formats
Efficiently encode images
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Minimize main-thread work 18.1 s
Ensure text remains visible during webfont load
Reduce the impact of third-party code Third-party code blocked the main thread for 4,820 ms
Does not use passive listeners to improve scrolling performance
Avoid document.write()
Reduce JavaScript execution time 11.3 s
Serve static assets with an efficient cache policy 22 resources found
Avoid an excessive DOM size 1,163 elements
Avoid enormous network payloads Total size was 2,777 KiB

Budget discutable