AI trainer job description: duties, requirements and skills

The short answer

An AI trainer is paid to make AI models more accurate by judging and writing the material they learn from. In the 588 open roles on Tier1 that list their duties, 78% ask the trainer to evaluate or grade model answers, 42% to write feedback explaining the grade, and 31% to create hard tasks or prompts. Most hire for a field or a language you already know, pay by the hour (median $75), and are remote contract work with flexible hours.

Everything below is counted from the responsibilities and requirements those roles publish, so it describes the job as it is being advertised right now, not as it was a year ago.

AI trainer responsibilities

These are the duties open roles list, with the share of roles that mention each one. A role usually combines two or three of them.

Evaluation is the centre of the job. You read what a model wrote, check it against what an expert would say, and score it on a rubric: correct, complete, safe, well reasoned. The written feedback matters as much as the score, because it is what the model is trained on. Roles for senior experts lean towards creating tasks that current models fail, with a verified answer, which is how labs measure progress. Roles built on a language lean towards transcription, recording and checking translations.

AI trainer requirements and qualifications

Of the 602 roles that publish requirements, this is how often each one comes up:

180 roles name a minimum number of years in the field, and the median is 3. A degree is asked for less often than people expect (24%), because what a role really screens for is proof you can do the work in its field: a licence for law and medicine (10% of roles overall), a doctorate for research-grade science (7%), or native command of a language (35%). Prior experience with AI is rarely required. Where it comes up (12%), it means using ChatGPT or similar tools in your own work, not building them.

Skills employers list

The soft skills roles name most often are written communication (171 roles), attention to detail (101 roles), analytical skills (49 roles), critical thinking (41 roles), working remotely and on your own (29 roles), problem solving (19 roles). In practice they are the same skill: reading carefully, noticing the one wrong step in a long answer, and saying exactly why it is wrong in a sentence someone else can act on.

Technical skills only appear in coding and data roles. The ones asked for most are Python (81), Java (26), Excel (26), TypeScript (25), Rust (21), Go (19), React (14), Node.js (13). A software engineer applying for AI training work is screened on code review and debugging in these languages, not on machine learning.

Pay and hours

524 of 699 open roles publish an hourly rate. The median is $75 an hour, half pay between $48 and $110, and 161 pay $100 or more. Of the 282 roles that state their hours, the median cap is 40 hours a week and 80 ask for 20 or fewer. The full breakdown by field and language is in the AI trainer salary guide and on the pay index.

A sample AI trainer job description

If you are hiring, or want to know what an application is measured against, this is a description written from the lines that come up most in open roles. Swap the field and language for your own.

AI Trainer ({field} expert), remote, contract

We are looking for {field} professionals to help train and evaluate AI models. You will review model answers to questions in your field, grade them against a rubric and write clear feedback on what is wrong and why. You will also write challenging prompts and reference answers that test where current models fall short.

Responsibilities

• Evaluate and rank AI-generated answers for accuracy, reasoning and safety.
• Write precise feedback that explains each grade.
• Create difficult, realistic tasks with verified answers.
• Apply and refine rubrics so grading stays consistent.

Requirements

• Professional experience in {field} (3+ years), or an advanced degree in it.
• Excellent written English, plus native {language} where the project needs it.
• Strong attention to detail and analytical judgement.
• No prior AI experience required.

Terms: remote, flexible hours, up to 40 hours a week, paid hourly (typically $48-$110/hr).

Where to find AI trainer jobs

Every role counted here is listed on Tier1 with its rate, hours and the countries it accepts. Browse them by field and profession, see the roles named for the job as AI evaluator and rater jobs, the part-time roles, or the roles open worldwide. To check one role against where you live, use the eligibility checker. If you want the bigger picture first, read what an AI trainer does and how to tell a real project from a scam.