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