Latam
Mateo Vargas
Senior backend engineer
11 years of experience
Reviews Python services and writes the reference solutions models are scored against.
NewAI training roles open across 4 regions
Get paid to train the world's best AI
Credexus fast-tracks software engineers in Latam, Asia, Europe and Canada into remote, high-paying AI training and evaluation work.
- Free for candidates
- Remote & flexible
- 19 platforms, one application
Our Partners
Independent agency. Listing a platform does not imply endorsement; trademarks belong to their owners.
How matching works
One profile. Every platform that fits.
Instead of guessing which of dozens of AI training platforms to try, you get a shortlist ranked by how well your skills match what they're hiring for.
Profile review
We read your experience, stack and written English once — no repeated applications.
Platform fit
Your profile is mapped to the platforms and projects where you are most likely to be accepted.
Assessment prep
You get briefed on what each platform's reviewers look for before you take their test.
LMScreened
Senior Python Engineer
São Paulo, Brazil · English C1 · 6 yrs
Best-fit platforms
94%Outlier
Python code evaluation
89%Mercor
Agentic coding tasks
82%Alignerr
Reasoning & review
Illustrative example of a Credexus match
The work
What AI training work looks like
Three kinds of projects make up most of what our engineers do. Pick one to see a sample task.
// Prompt: dedupe a list while keeping order
Response ALoses order
return list(set(xs))
Response BPreferred
seen = set() return [x for x in xs if not (x in seen or seen.add(x))]
Rationale: B preserves insertion order in O(n); A's set() reorders items.
Compare model-written solutions, find the bugs, and explain which answer is better and why. Your rationale becomes training signal.
See rolesWhy we exist
Frontier AI is built on expert human judgement. Yet thousands of brilliant engineers across Latin America, Asia, Europe and Canada never hear about the platforms that pay for it, or how to pass their assessments. Credexus closes that gap: one application, honest matching and a human in your corner.
Why Credexus
Skip the guesswork. Get matched where you'll get accepted.
AI labs need experienced engineers to write, review and rank code. There are dozens of platforms doing this work — we know which ones fit your stack, level and region.
19
AI training platforms our candidates work on
4
Regions: Latam, Asia, Europe and Canada
$0
Cost to engineers — platforms pay us
1
Application to be matched across all of them
Free, always
Platforms pay us. You never pay a fee or give up a share of your earnings.
Skip the cold applications
One application gets you matched across 19 platforms instead of guessing which to try.
Work from anywhere
Remote, flexible projects open to engineers across Latam, Asia, Europe and Canada.
Grow into senior work
We point you to specialist and agentic projects as your track record grows.
Your data, your call
We share your profile with a platform only after you agree to it.
A human in your corner
Real recruiters who answer questions about assessments, projects and pay.
How it works
From application to first paid task
A simple, human-led process designed to get strong engineers earning quickly.
- 01
Apply once
Share your experience, stack, region and English level in a 3-minute application. Attach your CV — no cover letter needed.
- 02
Get screened & matched
Our team reviews your profile and maps it to the platforms and projects where you are most likely to be accepted and paid well.
- 03
Prepare & get introduced
We brief you on each platform's assessment, share what reviewers look for, and introduce you where we have a direct line.
- 04
Start earning
Pass onboarding, pick up projects, and get paid directly by the platform. We stay in touch to help you level up to higher-paying work.
Open roles
View all roles AI training roles we're hiring for
Flexible, remote contracts for engineers who care about getting the details right.
- MidPart-time contractExample role
Python Engineer — AI Code Evaluation
Review, debug and rank code written by large language models, and write reference solutions that teach models to code better.
PythonpytestAlgorithmsAll regions10–40 hrs/week, flexibleUSD 30–60 / hour - SeniorContractExample role
Senior Full-Stack Engineer — Agentic Coding Tasks
Design realistic multi-file engineering tasks and grade how AI coding agents solve them in real repositories.
TypeScriptReactNode.jsDockerLatam · Europe · Canada20–40 hrs/weekUSD 50–90 / hour - MidPart-time contractExample role
Java / Backend Engineer — RLHF Specialist
Compare and rate model answers to backend engineering questions, from concurrency bugs to API design.
JavaSpringSQLAsia · Europe10–30 hrs/weekUSD 25–50 / hour
Regions
Built for engineers everywhere AI needs them
We focus on four regions where great engineers are underrepresented on AI training platforms.
Example profiles
Apply as an engineer Engineers ready for AI training work
Fictional profiles that show the experience we look for across our four regions. Real engineers apply with their own background.
AsiaHanae Okada
ML evaluation engineer
8 years of experience
Scores model answers on distributed systems and marks where the reasoning fails.
EuropeElise Moreau
Full-stack engineer
9 years of experience
Ranks generated TypeScript for correctness, clarity, and test coverage.
CanadaAmara Okonkwo
Staff software engineer
13 years of experience
Leads backend code reviews and steers models toward production-grade diffs.
No. Credexus is 100% free for engineers. We are paid by the platforms and companies we place talent with — never by you, and never through deductions from your earnings.
AI labs need experienced engineers to write, review, debug and rank code produced by AI models, and to design hard problems that push models further. Your judgement becomes training and evaluation data that makes the models better.
Software engineers based in Latin America, Asia, Europe or Canada with professional coding experience and strong written English. Most projects look for 2+ years of experience; senior and specialist projects pay more.
Both. Many projects are flexible contracts from 10 hours a week, and some run full-time. You choose what fits around your current commitments.
We review your profile once, tell you which platforms fit your stack and level, help you prepare for their assessments, and introduce you where we can — so you skip the guesswork of applying blindly to a dozen platforms.
Your next project is one application away
Apply in three minutes. We will match you with the AI training platforms that fit your stack — free, always.