Job Overview I run a service business on QuickBooks Online and Simpro and need the two platforms to behave like one system. First milestone: build a bi-directional sync from scratch—no plugins installed. Invoices, payments, customer records and inventory all have to stay aligned, preferably in real time, with solid error handling and a clear audit trail so I can maintain it myself once you hand it over. Once that accounting link is stable, I want to extend the workflow: Responsibilities Mobile technician toolkit: Using Simpro Lightning, create a lightweight app (Android/iOS or PWA) that lets field staff view jobs, clock time, add parts, collect signatures and work from pre-built templates. Everything should be ready for a new tech to log in and start. Event-driven messaging: When a job is set to "Approved" in Simpro, the assigned technician must receive an automated WhatsApp message. At the same time, QuickBooks should trigger a Zapier flow that calls the OpenAI API, generates a short customer confirmation note and attaches it to the job file. Deliverables Fully tested QuickBooks to Simpro sync covering invoices & payments, customers and inventory. Source or config files plus hand-over documentation. Branded Simpro Lightning mobile app with all templates loaded. Working WhatsApp trigger and OpenAI note automation. Clean sync log over one full billing cycle and technicians receiving job details on their phones with zero manual steps. Payment $10-30 USD Paid on delivery #J-18808-Ljbffr