Multi-Tenant Production System Handling Real Business Operations
PFCloud is a comprehensive production hosting management platform that real businesses depend on for their daily operations. I took full ownership of this multi-frontend system - handling customer billing, VPS provisioning, support tickets, and financial reporting for a live hosting business. This demonstrates my ability to build and maintain complex business-critical software that handles real revenue and customer operations.
Senior Full-Stack Product Engineer (End-to-End Ownership)
1+ months development + ongoing production maintenance
Live hosting business serving real customers
Multi-frontend production system with reactive backend
┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐
│ Marketing │ │ Dashboard │ │ Admin Panel │
│ (Astro) │ │ (Vue.js) │ │ (Vue.js) │
│ Port: 3000 │ │ Port: 3001 │ │ Port: 3002 │
└─────────────────┘ └─────────────────┘ └─────────────────┘
│ │ │
└───────────────────────┼───────────────────────┘
│
┌─────────────────┐
│ Load Balancer │
│ (Nginx/CDN) │
└─────────────────┘
│
┌─────────────────┐
│ Backend API │
│ (Java Vert.x) │
│ Port: 8080 │
└─────────────────┘
│
┌───────────────────────┼───────────────────────┐
│ │ │
┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐
│ SQLite DB │ │ Redis Cache │ │ Proxmox VE │
│ (Primary) │ │ (Sessions) │ │ (Hypervisor) │
└─────────────────┘ └─────────────────┘ └─────────────────┘
The platform implements a sophisticated multi-frontend architecture with three distinct applications:
Problem: Hosting business was losing customers due to manual billing processes, slow VPS provisioning, and lack of self-service options.
My Solution: Built complete multi-frontend platform with automated billing (Stripe integration), instant VPS provisioning via Proxmox API, and comprehensive customer self-service portal. System now handles real customer payments and operations without manual intervention.
Problem: Business needed three distinct interfaces (marketing site, customer portal, admin dashboard) that shared the same backend data and user sessions.
My Solution: Architected unified backend with Java + Vert.x serving three separate frontend applications: Astro marketing site, Vue.js customer dashboard, and Vue.js admin panel. Implemented shared authentication and session management across all interfaces.
Problem: System needed to handle 1000+ concurrent users performing real business operations (payments, VPS management, support tickets) without downtime.
My Solution: Implemented reactive programming with Vert.x for non-blocking I/O, Redis caching for session management, connection pooling for database efficiency, and comprehensive error handling. Achieved 99.9% uptime in production.
-- Core User Management
users (id, email, password_hash, first_name, last_name, discord_id, status)
admin_users (id, username, password_hash, email, role, status)
sessions (id, user_id, user_type, expires_at, ip_address)
-- Product & Service Management
products (id, name, category, price, billing_cycle, specifications, region_id)
services (id, user_id, product_id, service_name, configuration, status, next_due_date)
regions (id, name, code, country, city, datacenter)
-- Billing & Financial
orders (id, user_id, product_id, total_amount, tax_amount, status)
invoices (id, user_id, invoice_number, total_amount, status, due_date, payment_method)
-- Infrastructure Management
ip_pools (id, name, region_id, subnet, gateway, netmask)
ips (id, ip, pool_id, allocated_service_id, ptr_record)
-- Support & Communication
tickets (id, user_id, subject, department, priority, status)
ticket_replies (id, ticket_id, user_id, admin_id, message, is_internal)
-- Audit & Monitoring
activity_logs (id, user_id, admin_id, action, resource_type, details, ip_address)
The platform implements a comprehensive RESTful API with 100+ endpoints organized into logical modules:
POST /v1/login, /v1/checkRegistration, GET /v1/checkSession, /v1/loginWithDiscord
GET /v1/vps, /v1/virtual-server/:id, VNC console, resource statistics
GET /v1/products, /v1/vps-plans, POST /v1/placeOrder, invoice management
GET /v1/admin/users, /v1/admin/statistics, VPS creation, ticket management
// Request processing pipeline
RequestLogger -> SecurityHeaders -> RateLimit -> CORS ->
BodyHandler -> Authentication -> Authorization -> RouteHandler
Vert.x framework for high concurrency and non-blocking I/O operations
Optimized database connections for maximum efficiency
Session and API response caching for improved performance
Strategic indexing for query optimization and faster response times
Token-based authentication with configurable expiration
Industry-standard password hashing algorithm
Role-based access control with granular permissions
SSL/TLS encryption in production environments
System handles real customer payments and billing automatically
Automated account creation and VPS provisioning in minutes
60% reduction in support tickets through self-service portal
1000+ concurrent users supported without additional staff
99.9% uptime maintained in production environment
90% reduction in manual billing and provisioning tasks
Zero critical outages affecting customer operations
Platform architecture supports 10x business growth
This project demonstrates my approach to production system ownership:
Container orchestration for improved scalability
AWS, GCP, Azure integration for hybrid deployments
ML-powered insights and predictive analytics
Native iOS/Android apps for mobile management
I work best with founders who value ownership, clarity, and long-term collaboration. Let's discuss how I can build or stabilize your business-critical hosting operations.