NestJS + Next.js Developer — ISP Billing & MikroTik Automation MVP

I'm building Fiberlyflow, an ERP/billing platform for Internet Service Providers (ISPs) in Pakistan. The MVP focuses on automating billing and network control via MikroTik routers — replacing the manual Excel/WhatsApp workflows ISPs currently use. Tech stack: NestJS (backend), PostgreSQL, Next.js (admin dashboard), Redis + BullMQ for background jobs. Mobile apps come in a later phase. Phase 1 scope (single-tenant MVP): - Customer management (CNIC, package assignment, location, status) - Package management (speed tiers, pricing, validity, FUP) - MikroTik RouterOS API integration — PPPoE create/suspend/restore, speed profiles - Invoice generation + automated billing cron jobs - Payment recording with auto-enable/disable of customer connections - SMS notifications (bill due, payment received, disconnect alerts) - Basic roles/permissions (Owner, Manager, Accountant, Tech) - Simple dashboard (revenue, active customers, defaulters) What I'm looking for: - Proven experience with NestJS + PostgreSQL backend architecture - Experience with any network/router API integration (MikroTik RouterOS API is a strong plus; SNMP or general network automation experience is also relevant) - Comfortable building admin dashboards in Next.js - Experience with cron-based billing/invoicing logic - Clear async communication — I will provide a full technical specification document Deliverable: A working single-tenant MVP covering the items above, deployable on a Linux VPS. Please share relevant past projects, especially anything involving billing systems, ISP/telecom software, or router/network automation.