STEM Expert Chemistry and Computational Chemistry PhD
You will help evaluate and improve AI systems through chemistry problem-solving and technical review. The work covers both experimental and computational chemistry, with a focus on accurate reasoning, reproducible methods, and useful scientific recommendations.
- Field
- Chemistry
- Where
- United States, Algeria, Argentina, Austria, Bahrain, Bangladesh +46 more
- Commitment
- part time
- Asks for
- PhD
- Posted
- 2 days ago
Pay data for your profession: Science AI trainer jobs · PhD AI trainer jobs · Chemistry AI trainer jobs
How this pay compares
At $68/hr (the midpoint of $45 to $90), this role pays more than 28% of the 51 open chemistry roles with a listed pay range, below 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 2 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
Per week, before tax
$1,013
Per month, if the work is steady
$4,388
- Tax
- Contract pay arrives with no tax withheld. A US contractor at this rate and these hours would set aside about $1,109 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.
| Platform | Open | Median | Best-paid open role |
|---|---|---|---|
| Mercor | 11 | $85/hr | Chemistry Domain Expert$90-140/hr |
| Alignerr | 13 | $83/hr | Chemist, PhD$90-120/hr |
| OpenTrain AIthis role | 25 | $75/hr | Computational Materials Science Expert$175/hr |
| Handshake AI | 6 | up to $58/hr | Chemistry 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 help evaluate and improve AI systems through chemistry problem-solving and technical review. The work covers both experimental and computational chemistry, with a focus on accurate reasoning, reproducible methods, and useful scientific recommendations.
- Design, evaluate, and critique chemistry and computational chemistry problems for AI benchmarking.
- Assess reaction mechanisms, synthesis planning, spectroscopy analysis, molecular simulations, and electronic structure methods.
- Review experimental protocols, simulation parameters, and scientific software configurations for accuracy and reproducibility.
- Analyze chemical, spectroscopic, and simulation data and provide actionable recommendations.
- Help develop and validate chemistry-related AI models and tools.
- Document methods, findings, and best practices for clear technical knowledge transfer.
What it pays and takes
This is a part-time contractor role for candidates with advanced chemistry expertise. The work may suit someone focused on experimental chemistry, computational research, or both.
- Pay: $45 to $90 per hour.
- Work type: Part-time contract work.
- Location: Open to candidates in the countries listed for this role, including the United States, Canada, the United Kingdom, India, Japan, Brazil, and other eligible locations.
- Education: PhD in chemistry, computational chemistry, chemical biology, materials science, or a closely related field.
- Research background: Hands-on wet-lab research experience for experimental work, or extensive simulation-focused research for computational work.
- Expertise: Deep knowledge in at least one chemistry specialty.
- Language: Professional written and spoken English at C1 level or higher.
- Tools: Proficiency in Python or scientific tools such as Gaussian, ORCA, Psi4, GROMACS, LAMMPS, or RDKit.
- Core skills: Quantitative analysis, scientific reasoning, documentation, and communication.
- Helpful background: Postdoctoral research, research scientist or faculty experience, peer-reviewed publications, patents, open-source scientific software, chemistry benchmarking with AI or machine learning, drug discovery, reaction prediction, or retrosynthesis.
How it works
You apply here in about two minutes and finish on the hiring platform. The next step is a short AI interview (technical roles include a coding challenge). Passing it is how you qualify for paid tasks, so take it soon after you are invited.
The hiring platform's application for this job asks for your resume, your LinkedIn profile, your phone number, your location and answers to 4 screening questions.
About AI training work
AI training is the human work behind systems that learn from examples, including reviewing model answers, testing reasoning, and checking technical accuracy. People with specialist knowledge are needed to judge whether AI-generated work is scientifically sound and useful. OpenTrain helps people find these roles, build a profile, and apply in minutes.
From applying to your first payment on OpenTrain AI
- 1
Create a profile
Create a free OpenTrain profile with your domains, languages and hourly rate.
- 2
Apply
Apply to the listing. Some listings hire through OpenTrain; others send you to the hiring platform.
- 3
Funded milestones
The client funds each milestone before work starts.
- 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 $45-90/hr since Nov 10, 2026 with no change.
OpenTrain AI listed this title before: $45-90/hr, Oct 25, 2026 to Nov 7, 2026.
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.
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