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.

Getting started

Where to learn FiveM development

The resources FiveM developers actually use: the official Cfx.re documentation and natives reference, the Cfx.re forum, framework documentation for ESX, QBCore, Qbox and Overextended, the Lua 5.4 manual and Programming in Lua, reading open-source resources on GitHub, and how to learn efficiently.

Updated 11 Sept 20268 min readBy PiTyUs · FiveM developer

Overview

FiveM knowledge is scattered across official docs, framework sites, forum threads and a lot of outdated video tutorials. Knowing which sources to trust — and in which order to use them — saves beginners weeks of copying code that no longer works.

Official Cfx.re sources

Resource	Use it for
docs.fivem.net/docs	Scripting and server manuals, runtimes, resource manifest
docs.fivem.net/natives	Every native with parameters and notes
forum.cfx.re	Releases, help threads, announcements

Lua itself

FiveM uses a modified Lua 5.4. The official Lua 5.4 reference manual (lua.org/manual/5.4) and the book Programming in Lua (lua.org/pil) teach the language properly; our Lua basics and Lua tables guides cover the FiveM-specific parts.

Framework documentation

Framework / library	Docs
ESX Legacy	docs.esx-framework.org
QBCore	docs.qbcore.org
Qbox	docs.qbox.re
ox_lib, ox_inventory, ox_target, oxmysql, ox_core	overextended.dev

Framework comparisons: ESX vs QBCore vs Qbox.

Reading real code

The fastest way to learn patterns is reading code that many servers run: ox_lib, ox_inventory, qbx_core and the framework repositories on GitHub. Look at how they validate events, structure configs and clean up — then compare with our code review checklist.

Learning efficiently

Build tiny resources that do one thing — see your first script.
Read the native’s documentation before copying code that uses it.
Check the date on tutorials; prefer current framework versions.
Follow a staged plan — see the developer roadmap.

Frequently asked questions

Where is the official FiveM documentation?

At docs.fivem.net, with the natives reference at docs.fivem.net/natives.

Where can I learn Lua for FiveM?

The Lua 5.4 manual and Programming in Lua for the language, plus FiveM-specific guides for natives, events and resources.

Where are the ox_lib docs?

At overextended.dev, together with ox_inventory, ox_target, oxmysql and ox_core.

Are YouTube tutorials reliable?

Some are, but many are outdated. Check the date and compare with official and framework docs.

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.

Talk on Discord See services

Related guides

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