Migrate Flutter App Backend to Linux

I need an experienced DevOps / Backend Infrastructure Engineer to help migrate our Flutter app’s backend from a Windows VPS to a Linux VPS.

Currently, I have a small infrastructure setup (1-5 servers) that includes:
- Database
- APIs
- File storage
- Website

I don't have a specific Linux distribution preference for the VPS.

Ideal skills and experience:
- Proficiency in both Windows and Linux server environments
- Strong experience with database migration, API setup, and file storage management
- Familiarity with various Linux distributions and their configurations
- Background in handling small-scale backend infrastructures

Looking for someone who can ensure a smooth transition with minimal downtime.