We need an experienced Dolibarr ERP PHP developer to build a clean, upgrade-safe custom module for Dolibarr 23.0.0-alpha. The module will extend Dolibarr’s document manager in two ways: Allow user-group wise template uploads (ODT mandatory, other formats optional) visible to users with “modify third-party” rights. Add a one-click archive generation option on Third-Party & Contact cards, using Dolibarr’s built-in variable substitution system. Templates must be stored following user group folder structure, while generated archives should be saved in a separate, tag-filterable directory. All users with view third-party permission can view archives; editing follows standard Dolibarr rights. Requirements: PHP (Dolibarr module & hooks) Dolibarr Document & Substitution API experience Clean install, core-compliant, future-upgrade safe Reference repo provided for guidance This is a focused, well-defined Dolibarr module project.