I need an opencart developer

Fatal error: Uncaught Error: Class 'Redis' not found in /home/customer/www/lafarmaciadelsole.it/public_html/system/library/cache/redis.php:10 Stack trace: #0 /home/customer/www/lafarmaciadelsole.it/public_html/vqmod/vqcache/vq2-system_library_cache.php(24): Cache\Redis->__construct(3600) #1 /home/customer/www/lafarmaciadelsole.it/public_html/system/framework.php(49): Cache->__construct('redis', 3600) #2 /home/customer/www/lafarmaciadelsole.it/public_html/vqmod/vqcache/vq2-system_startup.php(125): require_once('/home/customer/...') #3 /home/customer/www/lafarmaciadelsole.it/public_html/index.php(23): start('catalog') #4 {main} thrown in /home/customer/www/lafarmaciadelsole.it/public_html/system/library/cache/redis.php on line 10

this is my problem, can u help me?