Technical Mentor & Operative Architect: HA Ubuntu Cluster (Mailcow, Apache, MariaDB Replication) Job Description: [IMPORTANT: READ CAREFULLY BEFORE APPLYING] I am NOT looking for someone to just build a server and hand over the keys. I am looking for a Technical Mentor / Instructor and Operative Architect who will build a high-availability (HA) SaaS infrastructure on Ubuntu Server together with me. The goal is full knowledge transfer. You will act as my "Co-Pilot," teaching me every step so that I can maintain, troubleshoot, and scale the system myself. You should also be open to a long-term relationship for future Q&A and support. The Tech Stack & Requirements: OS: Ubuntu Server (Hardened). Orchestration: Docker & Kubernetes (K3s/MicroK8s preferred). Mail: Mailcow (Docker-based) integrated into the architecture. Web: Apache for PHP applications. Database: MariaDB Cluster & Replication (Galera or Master-Slave with automated failover). Security: 3-Way Backup Strategy (Local, Hot-Standby, Off-site) that is 100% restorable by me. MANDATORY APPLICATION REQUIREMENTS: To filter out generic applications and AI-generated spam, you MUST include the following in your proposal: Step-by-Step Training Plan: How will you teach me the stack? (From Ubuntu basics to the MariaDB Cluster). Project Implementation Plan: A timeline of how we will set up the production environment. No AI-Generated Responses: If your proposal looks like a standard ChatGPT template, it will be immediately rejected. I am looking for a human expert with a personal teaching touch. The Goal: Zero Downtime: If one server fails or is overloaded, everything must keep running. Sovereignty: I need to be able to rebuild the 3-way backup system myself if necessary.