What is FiveM development and what does a FiveM developer do?

FiveM extends Grand Theft Auto V into a moddable multiplayer framework. A FiveM developer writes Lua for CitizenFX, builds NUI in HTML or React, connects MySQL via oxmysql, integrates ESX or QBCore (or custom frameworks), and optimizes for OneSync population, entity limits, and server tick performance.

Do you work with ESX, QBCore, Qbox, and ox_lib on FiveM servers?

Yes. PiTyUs ships features across ESX Legacy-style economies, QBCore and Qbox stacks, ox_lib notifications and input dialogs, ox_inventory patterns where needed, and fully custom frameworks when design goals go beyond off-the-shelf templates.

Can you build NUI (in-game browsers) for FiveM?

NUI is a core specialty: React, Vue, or Vite-built panels, shops, MDTs, crafting UIs, and admin tools with accessible markup, responsive layouts, and tight Lua↔JS bridges using NUI callbacks and message contracts.

How do you approach FiveM server performance and OneSync?

Profiling-first: reducing redundant events, batching state updates, respecting entity and player bucket rules, tuning population zones, and validating database queries. The goal is stable frame time for clients and predictable server ms under peak concurrent players.

Do you offer website and landing page work for FiveM brands?

Yes. Next.js and modern static sites for server brands, waitlist pages, rules and lore sites, and documentation hubs—SEO-oriented structure, fast Core Web Vitals, and design systems that match in-game identity.

What is CitizenFX scripting and how does it relate to FiveM?

CitizenFX is the runtime behind FiveM. Scripts use Lua with FiveM natives for entities, players, and world state. Resources are packaged with fxmanifest.lua, loaded by the server, and coordinated with client and server contexts.

How much does a custom FiveM script cost?

Pricing is scope-based rather than fixed. A small standalone resource is very different from a multi-job economy, a full NUI inventory, or an ESX-to-QBCore migration. Share the framework, the feature list, and the deadline, and you get a clear estimate with milestones before any work starts—no surprise scope creep.

Can you fix, optimize, or refactor an existing FiveM server?

Yes—server audits and refactors are a core service. That includes OneSync and server-tick profiling, removing redundant events and net traffic, fixing resource conflicts, hardening exploitable handlers, cleaning up oxmysql queries, and upgrading aging ESX or QBCore stacks without breaking live gameplay for your players.

Should I use ESX or QBCore for my GTA V roleplay server?

Both are solid—the right choice depends on your resource library, your team's familiarity, and how much custom work you plan. QBCore and Qbox ship a more modern core and tooling out of the box; ESX Legacy has a huge ecosystem and battle-tested scripts. PiTyUs builds on all of them, and on fully custom frameworks when off-the-shelf templates limit your design.

Can you convert or bridge scripts between ESX, QBCore, and Qbox?

Yes. Framework conversions and bridges are common work: porting jobs, inventories, and economies between ESX and QBCore/Qbox, wiring ox_lib and ox_inventory compatibility layers, and keeping shared exports stable so the rest of your server keeps working during the migration.

Do you build custom FiveM HUDs, phones, and inventory UIs?

NUI is a specialty. Custom HUDs, phone apps, inventories, crafting tablets, police MDTs, and admin panels in React, Vue, or vanilla CEF—responsive, accessible, and tuned for 1080p in-game rendering with tight Lua↔JS callback contracts and optimistic UI where it helps.

How can I contact PiTyUs for a FiveM commission?

Join the PiTyUs Discord at https://discord.gg/64a26MK4jZ, open a support ticket there, or send a direct message to the user pityus on Discord. Describe your scope, framework (ESX, QBCore, or custom), timeline, and whether you need NUI, database work, or full-stack delivery. This site does not list a public email or GitHub for inquiries.

What is CRM Development (crmfivem.dev) and how is PiTyUs involved?

CRM Development is an affiliated FiveM platform at https://crmfivem.dev/ offering server-oriented packages, custom scripts, and ESX/QBCore ecosystem resources, with secure role-based access and a cohesive design system. PiTyUs leads the product UI and front-end engineering; the live site credits PiTyUs in the footer as the design partner.

Frameworks

Moving a server or script from ESX to QBCore/Qbox

Plan an ESX to QBCore or Qbox migration: mapping xPlayer functions to QBCore Player functions and Qbox exports, money accounts, jobs and grades, items and inventories, database differences (users vs players, identifier vs citizenid), converting player data, bridging scripts instead of rewriting, and testing.

Updated 11 Sept 202612 min readBy PiTyUs · FiveM developer

Overview

Framework migrations are among the riskiest projects on a live server: every script touches the framework, and every player’s money and items live in its tables. Most of the work is mapping — functions, data and events — and the most important decision is which scripts to convert, which to bridge and which to replace.

API mapping

ESX	QBCore	Qbox
`ESX.GetPlayerFromId(src)`	`QBCore.Functions.GetPlayer(src)`	`exports.qbx_core:GetPlayer(src)`
`xPlayer.identifier`	`Player.PlayerData.citizenid`	`player.PlayerData.citizenid`
`xPlayer.addMoney(n)`	`Player.Functions.AddMoney('cash', n)`	`exports.qbx_core:AddMoney(src, 'cash', n)`
`xPlayer.addAccountMoney('bank', n)`	`Player.Functions.AddMoney('bank', n)`	`exports.qbx_core:AddMoney(src, 'bank', n)`
`xPlayer.job.name` / `.grade`	`PlayerData.job.name` / `.job.grade.level`	Same as QBCore
`xPlayer.setJob(job, grade)`	`Player.Functions.SetJob(job, grade)`	`exports.qbx_core:SetJob(src, job, grade)`
`esx:playerLoaded`	`QBCore:Client:OnPlayerLoaded`	`QBX.PlayerData` / same events

Full APIs: ESX tutorial, QBCore tutorial, Qbox tutorial.

Data differences

Data	ESX	QBCore / Qbox
Character table	`users` keyed by `identifier`	`players` keyed by `citizenid` (plus `license`)
Money	`accounts` JSON (money, bank, black_money)	`money` JSON (cash, bank, crypto)
Job	`job`, `job_grade` columns	`job` JSON with grade table
Vehicles	`owned_vehicles`	`player_vehicles`
Items	Inventory/ESX tables	Inventory-specific (qb-inventory or ox_inventory)

Write a conversion script that reads each ESX row, generates a citizenid, maps money accounts and jobs, and inserts into the new tables — then verify totals (sum of all money before and after). Schema tips: database design.

Convert, bridge or replace

Script type	Usual choice
Your own scripts	Convert, or add a framework bridge — see bridges
Popular multi-framework resources	Switch the config to the new framework
Old ESX-only resources	Replace with maintained equivalents
Escrowed ESX-only scripts	Ask the seller for a QB/Qbox version

01A migration plan

Inventory every resource and its framework dependency.
Set up the new framework on a test server with a copy of the database.
Convert data; compare money, items and vehicle counts.
Test every job, shop, garage and admin tool.
Announce a maintenance window; take a backup; switch; keep the old server ready for rollback.

Backups: server backups.

Frequently asked questions

Can I convert ESX scripts to QBCore?

Yes — map the xPlayer calls to QBCore Player functions (or Qbox exports), update events and inventory calls, and test.

Should I migrate to QBCore or Qbox?

For a new move, Qbox gives the QBCore data model with a modern ox-based stack; QBCore has the larger legacy script catalogue.

Can I keep player data when switching frameworks?

Yes, with a conversion script that maps users to players, money accounts and jobs. Test it on a copy first.

What is the biggest migration risk?

Economy data: money, items and vehicles. Verify totals before and after conversion.

Free handbook · 20 chapters · 65 min

The FiveM Developer Handbook

Lua, resources, events and callbacks, natives and threads, state bags, oxmysql, ESX / QBCore / Qbox, ox_lib, NUI, secure code, performance and selling on Tebex — with code for every part.

Read the handbook

Need this built, not just explained?

Ten years of FiveM work, from Lua to NUI

Custom resources, React NUI, ESX / QBCore / Qbox integration, OneSync performance audits and security reviews — plus the websites and SEO around your server brand.

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