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OpenTrainPhD

Chemistry Expert for AI Response Evaluation

You will use practical chemistry knowledge to help evaluate and improve AI systems. The work focuses on technical accuracy, reproducibility, and whether model responses reflect real laboratory, research, and analytical practice.

Field
Chemistry
Where
United States
Commitment
part time
Hours
up to 20/week
Asks for
PhD
Posted
6 days ago

Pay data for your profession: Science AI trainer jobs · PhD AI trainer jobs · Chemistry 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 $85/hr, this role pays more than 67% of the 51 open chemistry roles with a listed pay range, above the median of $83.

Open chemistry roles that ask for a PhD have a median of $79/hr (32 roles).

Among platforms with 10 or more priced chemistry roles, Mercor has the highest median ($85/hr across 11 roles) and OpenTrain AI the lowest ($75/hr across 25).

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

$85/hr

Per week, before tax

$1,700

Per month, if the work is steady

$7,367

Tax
Contract pay arrives with no tax withheld. A US contractor at this rate and these hours would set aside about $1,862 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 chemistry 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
Mercor11$85/hrChemistry Domain Expert$90-140/hr
Alignerr13$83/hrChemist, PhD$90-120/hr
OpenTrain AIthis role25$75/hrComputational Materials Science Expert$175/hr
Handshake AI6up to $58/hrChemistry ExpertUp to $150/hr

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

All 57 open chemistry roles →

The full listing

As posted on OpenTrain AI. See the original

The work

You will use practical chemistry knowledge to help evaluate and improve AI systems. The work focuses on technical accuracy, reproducibility, and whether model responses reflect real laboratory, research, and analytical practice.

  • Create chemistry problems and scenarios based on real laboratory, research, or analytical work.
  • Review AI-generated responses for technical accuracy and reproducibility.
  • Judge whether model outputs match how chemistry work is performed in practice.
  • Write structured feedback to improve AI model performance.
  • Complete project tasks independently in a remote, asynchronous setting.

What it pays and takes

This is ongoing, flexible, part-time contract work. It is marked as requiring 20+ hours per week, and the role is open to candidates in the United States.

  • Pay: up to $85 per hour.
  • Work arrangement: remote, part-time, project-based contract work.
  • Location: open to candidates in the United States.
  • Language: fluent English for written feedback and technical communication.
  • Education: a master’s or PhD in chemistry or a closely related field, such as biochemistry, chemical engineering, or materials science.
  • Clear written communication and close attention to detail.
  • Ability to explain complex chemistry concepts clearly.
  • Helpful experience includes research across multiple chemistry areas, specialized techniques or instruments such as NMR, mass spectrometry, chromatography, or synthesis, and computational chemistry platforms.
  • Peer-reviewed publications or experience in pharmaceutical, materials, energy, chemical, or national laboratory settings is valuable.

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. Contributors create examples, review model responses, and explain what makes an answer accurate or useful, while subject-matter experts help models handle specialized topics such as chemistry. OpenTrain helps people find these projects, build a profile, and apply in minutes.

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 $85/hr since Nov 6, 2026 with no change.

Across OpenTrain AI's chemistry roles, the median listed pay was $70/hr on Nov 1, 2026 (13 roles) and is $75/hr as of Nov 11, 2026 (25 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 chemistry roles

All 57 chemistry roles →