Convert Rage MP Server to FiveM and implement full backend for it

I already have a full Grand RP project running on Rage MP with the entire front-end finished. What I now need is a seamless migration to FiveM and the completion of the remaining back-end code (about 90 % still pending).

The job breaks down into two intertwined parts:

1. Total conversion
Every existing Rage MP module—authentication, economy, missions, and anything else live on the server—must run natively on FiveM when we are done. Expect to adjust resource structure, events, and any client-server communication so the gameplay experience stays identical or improves.

2. Back-end completion
• Rework and finish all server-side scripts, database calls, and API hooks so they compile and run cleanly on FiveM.
• Optimise and finalise the current MySQL schema, ensuring data integrity during the migration.
• Provide any glue code or new endpoints required for third-party services the game relies on.

Acceptance criteria
• Players can log in, play, and save progress on FiveM with no data loss.
• All core systems (authentication, economy, mission flow) function at least as well as on the Rage MP build.
• No critical errors in server logs after a full play-test session of 50+ concurrent users.
• A concise hand-over document listing updated resources, database changes, and start-up instructions.

If you have solid, demonstrable experience moving or building large-scale servers on both Rage MP and FiveM, and you are comfortable with MySQL-driven back ends, let’s discuss timelines and milestones.