Full-Stack Developer for Availability Monitoring System -- 3

We are looking for an experienced full-stack developer to build a scalable availability monitoring and client management system.
The system should:
Monitor availability of time-based service slots
Detect newly available dates
Notify clients in real time
Support multi-client configuration
Include an admin dashboard
This is a SaaS-style platform with queue processing and session management.

Core Requirements
Monitoring Engine
Continuous availability checking
Near real-time detection
Retry & error handling logic
Structured logging
Multi-Client Support
100 concurrent clients
Per-client configuration:
Location selection
Date range
Time preferences
Priority level
Notification System
Email and WhatsApp API integration
Real-time alerts
Status updates
Admin Dashboard
Live monitoring status
Client management
Detection history
System health indicators
Manual pause/resume control

Preferred Stack
Golang
Node.js
Playwright or similar automation framework
PostgreSQL
Redis / Queue system
React
Docker
Open to architectural suggestions.

Deliverables
Working MVP system
Source code
Live Training
Deployment documentation
1 Year Free Maintanence Support

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來源：Freelancer.com | 出價次數：43 | 剩餘時間：6 日 | 專案類型：固定預算