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.

Engineering

Using the FiveM profiler to find slow code

How to use FiveM’s built-in profiler on the client and server: profiler record, status, view and saveJSON, opening profiles in Chrome DevTools, reading frame time and resource threads, and turning a spike into a fix.

Updated 11 Sept 202610 min readBy PiTyUs · FiveM developer

Overview

resmon tells you which resource is slow; the profiler tells you why. It records every frame for a few seconds, then shows exactly which resource, which thread and which line took the time — on the client or on the server. It is the tool that ends arguments about which script causes “server lag”.

01Recording a profile

Wait until the lag is happening (or reproduce it).
Server: type profiler record 500 in the server console. Client: open F8 and type the same.
Check profiler status until the capture completes.
Run profiler view to open it in Chrome — on the server, copy the link it prints into Chrome.
Or save it with profiler saveJSON lag-2026-09-11.json to study later or share with a developer.

Reading the result

The profile opens in Chrome DevTools’ Performance view. Frame time is shown per frame; tall frames are hitches. Zoom into one, then hover the coloured blocks beneath it: each shows the resource and the file and line it was running, with its duration in milliseconds.

One block that is always wide → a heavy function that runs every frame.
Occasional huge blocks → a database callback, a big loop or a large event payload.
Many small blocks from one resource → too many threads or per-frame loops.

Server hitches

When the server console prints “server thread hitch warning”, the main server thread took too long for a tick. Profiling the server during those moments shows which resource blocked it — usually synchronous work in an event handler, a huge loop over players or a slow query waited on in the wrong place. The minimap studio’s server performance guide covers the server side in more depth.

Turning a finding into a fix

Profile shows	Typical fix
A per-frame loop doing distance checks	Adaptive sleep — threads and Wait
Repeated native calls in one function	Cache results in locals — Lua performance
A database wait in a hot path	Cache or batch queries — oxmysql
A huge event payload	Send less, or use latent events — events

Frequently asked questions

How do I use the FiveM profiler?

Run profiler record 500 in the server console or F8, wait for profiler status to finish, then profiler view to open it in Chrome.

Where does profiler saveJSON save the file?

In the folder containing your server’s run script.

How do I open a saved profile?

In Chrome DevTools, open the Performance tab, right-click and load the profile JSON.

Should I use resmon or the profiler?

resmon to find which resource is slow; the profiler to see which function inside it and why.

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

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