WordPress Backend & Server Maintenance Developer

We need an experienced WordPress backend developer to maintain multiple WordPress sites. The work includes plugin updates, PHP management, server upkeep, Fastly/CDN support, backups, security checks, and fixing backend issues when they come up. The right person should know how to update WordPress safely without breaking live sites and be comfortable with PHP, MySQL, server logs, caching, staging, and rollback. Please share recent experience with WordPress maintenance, PHP updates, plugin conflicts, or Fastly/CDN support.