I’m looking for an Odoo specialist who can take my current Odoo 18 production instance and move it smoothly to Odoo 19 without losing a single record or feature. The database already runs Sales & CRM, Inventory Management, and Accounting, plus a handful of light custom tweaks layered onto those modules. Here’s what I need you to handle: • Audit & migration plan – review the existing setup, list potential breaking points, and map the upgrade path. • Core and community upgrade – bring every standard module forward to 19. • Custom code refactor – adapt our “some customizations” so they comply with the v19 API and style guidelines. • Full data migration – scripts or tools that migrate all partners, products, orders, stock moves, journal entries, attachments, and settings intact. • Functional testing – walkthroughs of Sales/CRM, Inventory, and Accounting flows to confirm they behave exactly as before (or better). • Post-upgrade support – resolve any residual errors and provide a concise hand-off note on what changed. Success is measured by zero data loss, clean server logs, and all three business areas running end-to-end on Odoo 19. If you’ve done similar mid-version jumps and can deliver within a reasonable timeframe, I’m ready to get started.