1
Task Definition
PlanEngineers break the work into small tasks, each with clear limits, an expected result, and a way to check it.
Codex developers
Parallel AI coding, reviewed by senior engineers.
Codex can work on several coding tasks in the background at once. A senior engineer reviews everything it produces before any of it reaches your product.
Free first call. A senior engineer reviews your project and replies within one business day.
Async background executionParallel task draftingSenior review on every output
Accelerated by
Lovable
Cursor
Replit
Copilot
Kiro
Antigravity
Figma MakeLovableCursorReplitCopilotKiroAntigravityFigma MakeIn short
What are Codex developers?
Codex can work on several coding tasks in the background at once. A senior engineer reviews everything it produces before any of it reaches your product.
Where Codex helps most
- Backlogs of small tasks
- Framework migrations
- Adding missing tests
- Repetitive code changes
How we work
- The same senior engineers from kickoff to handoff.
- Weekly progress you can see and try.
- Architecture and code decisions documented as we go.
- You own the code, the docs, and the accounts.
Codex Explained
What Codex does, and what we do
The AI tool speeds up the build. Senior engineers make the architecture, testing, and release decisions.
WHAT CODEX DOES
- -Works through coding tasks on its own, in a safe sandbox.
- -Can draft several separate jobs at the same time.
- -Handles repetitive changes that are slow to do by hand.
- -Helps move code from an old way of doing things to a new one.
- -Hands back something to review, rather than something already shipped.
HOW WE USE CODEX
- +Week 1: break the work into jobs small enough to check properly.
- +Weeks 1-2: let Codex draft them in the background, several at a time.
- +Throughout: a senior engineer reviews every draft before it goes any further.
- +Before release: test the key user journeys, fix what we find, and prepare a rollback plan.
- +Handover: a clean change history, documented decisions, and a next-step roadmap.
“Codex can draft a lot at once. The value is a senior engineer reviewing all of it before it reaches your product.”
Best Use Cases
When Codex is the right pick
Codex is strongest when the work splits into lots of separate pieces that can be checked one by one.
Backlogs of small tasks
Framework migrations
Adding missing tests
Repetitive code changes
We choose tools per project: AI speed where it helps, senior review where the risk is. If another tool suits your project better, we'll tell you.
Delivery Flow
From fast Codex work to software you can launch
Codex gives us a head start. A senior engineer still decides how it's built, reviews it, and signs off the release.
The plan
How we deliver Codex projects
2
Async Drafting
CodexCodex works through the tasks in the background and runs the tests before handing back a draft.
3
Engineer Review
HumanA senior engineer reviews every diff, fixes the structure where needed, and covers the edge cases.
4
Ship
DeployWe merge the reviewed code, release it with monitoring, and write down the decisions.
Typical deliverables
Parallel Task Delivery
Clear a backlog faster without hiring for it.
Framework Migrations
Move off outdated code without rewriting everything at once.
Repetitive Changes
Hand off repetitive work and keep engineers on the hard problems.
Example scopes
Examples of Codex work we take on
These are typical scopes, not results from a specific client. We'll scope yours on a free call before you commit.
Codex + Next.js + Prisma3 weeks
Move a codebase onto a supported framework version without pausing the roadmap.
Codex + TypeScript + PostgreSQL2.5 weeks
Clear a backlog of small fixes that has been sitting for months.
Codex + React + Node.js4 weeks
Add tests to the parts of the code that have none, before changing them.
Delivery Risk
What changes when a senior engineer leads the work
Writing code faster only helps if your product still works when real users arrive.
WHAT GOES WRONG WITHOUT US
- -Fast early progress, then weeks lost to clean-up.
- -Architecture decisions made ad hoc and never written down.
- -New features breaking things that used to work.
- -No tests on the journeys that matter most, like sign-up and payments.
- -The next developer has to work out how it all fits together.
WHAT YOU GET WITH US
- +Steady weekly progress, with fewer things breaking between releases.
- +Architecture decisions written down in plain English.
- +Releases you can roll back if something goes wrong.
- +Tests on your core user journeys before each release.
- +Maintainable code your own team can pick up and extend.
Problems Found
// Raw AI output
function handleClick() {
fetch('/api/data')
.then(r => r.json())
}
❌ No error handling❌ No types❌ No validation
Production Ready
// After Codivox review
async function handleClick() {
try {
setLoading(true);
const data = await api.fetch();
validateResponse(data);
} catch (error) {
handleError(error);
}
}
✓ Error handling✓ Type safe✓ Validated
You get speed and reliability.
Why Codivox
Why people pick us for Codex work
Senior engineers lead the work, the scope is agreed in writing, every change is reviewed, and you own everything at the end.
1
The same senior engineers from kickoff to handoff.2
Weekly progress you can see and try.3
Architecture and code decisions documented as we go.4
You own the code, the docs, and the accounts.You get Codex speed, with a senior engineer accountable for the result.
FAQ
Questions teams ask before hiring Codex developers
Straight answers on pricing, ownership, and how we work. If yours isn't here, ask us.
How is Codex different from Cursor or Copilot?
Codex can take a task and work on it in the background in its own sandbox, then hand back a change to review. Cursor and Copilot are mostly used inside the editor while an engineer codes. We use Codex for batches of well-defined work and the editor tools for live coding.
Can Codex work on our existing codebase?
Yes. Codex can work from your GitHub repository. We set it up with your conventions and limits first, and every change it proposes goes through review like any other.
What happens if Codex produces incorrect code?
Our process is set up to catch it before it reaches your product. Codex can run your tests against its own changes, and a senior engineer reviews every diff (the exact lines changed) before it merges. Anything wrong is sent back or fixed by hand.
How much does it cost to hire Codex developers?
Most projects are a fixed price for an agreed scope, so you know the cost before work starts. The price depends on how many screens and features you need, what it connects to (payments, CRMs, other APIs), and your deadline. As a reference point, MVP builds start at $1,999 and ongoing monthly work at $2,999 per month. After a free call, you get a written plan and a quote.
Who owns the code?
You do, from day one. The code, the documentation, and the accounts are yours. We work as your delivery team, and nothing is locked to us.
What happens in the first week?
We review the code (or your idea), agree what's in scope and what isn't, flag the main risks, and give you a plan with dates. Building starts once you're happy with it.
Research basis
Source notes for Codex
The links below are the tool makers' own pages. Everything else here is our view, not a promise from them, and not a claim about what your project will do.
Primary source: OpenAI Codex
Explore next
Senior teams for other tools
Each AI tool suits different work. Compare them, or ask us which one fits your project.
Antigravity Developers
Hire Antigravity developers to find what is wrong with your codebase first. Senior engineers then fix the parts that matter most.
Lovable Developers
Hire Lovable developers to take a working build and make it safe to sell. We rebuild what will not hold and hand you the code.
Cursor Developers
Hire Cursor developers to build features, tidy risky code, and test it properly, inside the codebase you already have. You own it at the end.
Replit Developers
Hire Replit developers for first versions, internal tools, and prototypes. We make them hold up, then hand you the code and the logins.
Kiro Developers
Hire Kiro developers who write the spec first. Senior engineers turn it into working software, test it, and hand over clean code.
Copilot Developers
Hire GitHub Copilot developers. Senior engineers keep the quality bar while Copilot takes repetitive coding out of the day.
Ready to start
Want it built fast without paying for it twice?
Send us what you have, or where you're stuck. We'll reply within one business day, and on a free call we'll map the scope, timeline, and risks before any code is written.
Free first callReply within one business dayYou own the code and IP