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OpenTrain

Mechanical Engineering Expert for AI Evaluation

You will help improve AI systems by testing how well they understand and explain mechanical engineering. The work includes creating technical prompts, researching topics with AI assistance, and reviewing generated answers.

Field
Engineering
Where
United States
Commitment
part time
Hours
up to 20/week
Posted
6 days ago

Pay data for your profession: Engineering AI trainer jobs

How this pay compares

The title points to rating and reviewing ai output: judging a model's answers or code against guidelines, such as which of two is better or whether one is correct and safe. What each kind of AI training work pays

At $75/hr, this role pays more than 39% of the 207 open engineering roles with a listed pay range, below the median of $80.

Among platforms with 10 or more priced engineering roles, Mercor has the highest median ($88/hr across 35 roles) and micro1 the lowest ($60/hr across 28).

OpenTrain AI roles that closed since late October stayed listed a median of 31 days (122 roles). OpenTrain AI posted this one 6 days ago.

Computed from 2,746 open roles we track across Mercor, micro1, Handshake AI, Alignerr, Appen and OpenTrain AI, refreshed daily. Midpoints of listed ranges; “up to” ceilings are left out of medians.

What you would earn at this rate

Rate

$75/hr

Per week, before tax

$1,500

Per month, if the work is steady

$6,500

Tax
Contract pay arrives with no tax withheld. A US contractor at this rate and these hours would set aside about $1,643 a month for self-employment tax plus federal income tax at the 12% bracket (25%, before state tax). Outside the US, your own country's rules apply.

Assumes paid hours only; unpaid assessments, onboarding and gaps between projects lower the real figure. Full take-home calculator · Track what you actually earn

Open engineering roles on each platform

The same kind of work, priced on every platform we track, with the best-paid open role on each.

PlatformOpenMedianBest-paid open role
Mercor36$88/hrInfrastructure / Site Reliability Engineer (SRE)$200/hr
OpenTrain AIthis role132$85/hrChief Engineer / Senior Mechanical Engineer$200-300/hr
Alignerr14$61/hrRobotics Technician$40-120/hr
micro129$60/hrMember of Technical Staff, Research Engineering$400k-800k/yr
Handshake AI52up to $85/hrEngineering LeadUp to $195/hr

“Up to” rows list only ceilings, so their median is a maximum, not comparable with the range midpoints above them.

All 263 open engineering roles →

The full listing

As posted on OpenTrain AI. See the original

The work

You will help improve AI systems by testing how well they understand and explain mechanical engineering. The work includes creating technical prompts, researching topics with AI assistance, and reviewing generated answers.

You will work independently in a primarily asynchronous setting. Assignments can vary as projects become available, and the program operates year-round.

  • Write prompts that test AI knowledge of mechanical engineering concepts.
  • Evaluate AI-generated answers for technical accuracy, understanding, and quality of explanation.
  • Research mechanical engineering topics and use that research in AI evaluation.
  • Use your engineering judgment to identify strong, incomplete, or incorrect answers.

What it pays and takes

This is a remote, part-time contractor role for candidates in the United States.

  • Pay: Up to $75 per hour.
  • Workload: 20+ hours per week.
  • Schedule: Flexible and primarily asynchronous.
  • Location: Open to candidates in the United States.
  • Language: Fluent in English.
  • Education: Currently enrolled in an undergraduate mechanical engineering program.
  • Knowledge: Strong understanding of core mechanical engineering concepts.
  • Communication: Able to explain technical ideas clearly and judge the quality of technical explanations.
  • Work style: Able to work independently and contribute specialized expertise to AI research and model improvement.

How it works

Apply on OpenTrain with your resume, then complete the application on the hiring site.

About AI training work

AI training is the human work behind systems that generate and understand text. People with subject expertise write examples, review model answers, and point out errors so AI can handle specialized topics more accurately. OpenTrain helps people find these projects and build careers in AI training and data labeling.

From applying to your first payment on OpenTrain AI

  1. 1

    Create a profile

    Create a free OpenTrain profile with your domains, languages and hourly rate.

  2. 2

    Apply

    Apply to the listing. Some listings hire through OpenTrain; others send you to the hiring platform.

  3. 3

    Funded milestones

    The client funds each milestone before work starts.

  4. 4

    First payment

    OpenTrain pays out to your connected payout method when the client approves the milestone. It doesn't publish a fixed payout schedule.

Sources: OpenTrain: AI training careers, OpenTrain docs: invoicing and payouts

Full OpenTrain AI profile: watch-outs and the public record →

Pay history

OpenTrain AI has listed this role at $75/hr since Nov 6, 2026 with no change.

Across OpenTrain AI's engineering roles, the median listed pay was $69/hr on Nov 1, 2026 (50 roles) and is $85/hr as of Nov 11, 2026 (130 roles).

What workers report about OpenTrain AI

Anonymous reports from people who applied or worked there: whether they got work, what they were paid and how fast.

Other engineering roles

All 263 engineering roles →