Mercor
MercorVerified listing

Chemistry Specialist, Synthetic & Analytical Chemistry

70–100/hr
Remote · Remote (London, UK / US East Coast)
part-time
30 openings
Posted October 23, 2026
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Listing checked October 23, 2026 · pay as published by Mercor

Key details

Pay
$70–100/hr
Location
Remote · Remote (London, UK / US East Coast)United Kingdom, United States
Job type
part-time
Openings
30
Posted
October 23, 2026

Overview

A leading AI lab needs chemists who can turn lab judgment into training signal for models built for science. You will join as a part-time chemistry subject-matter expert through Cincinnatus LLC, work remotely from London, the UK, or the US East Coast, and support a research team as an extended team member. The work centers on synthetic chemistry, analytical chemistry, and cheminformatics, with tasks that test model reasoning on reaction routes, structure elucidation, and molecular representations such as SMILES. Expect to write technical problems, grade model answers, and give written feedback that shapes how these systems learn.

What You'll Do6

  • Coach research and engineering teams on chemistry gaps that limit model performance, including reaction mechanisms, structure elucidation, and physical-chemical property reasoning.
  • Create hard, non-searchable chemistry tasks, benchmarks, and training data, then write accurate solutions for multi-step route design, reaction optimization, and spectroscopic characterization.
  • Review model outputs and step-by-step reasoning for chemical logic, tool use, and factual errors, then send written technical feedback.
  • Write specifications, grading rubrics, and verification steps for chemistry data from external teams, and serve as the domain authority on data quality.
  • Advise on experimental design, common lab failure modes, and the chemical validity of outputs that use molecular representations such as SMILES.
  • Work with other subject-matter experts to keep training data consistent and accurate.

Requirements8

  • PhD in chemistry with a focus on synthetic, organic, medicinal, analytical, or physical chemistry, or research experience that matches that level.
  • At least 3 years of hands-on chemistry work at a pharmaceutical, biotech, chemical, materials company, contract research organization, or university research group.
  • Proven small-molecule synthesis work, including multi-step route design and reaction optimization.
  • Practical compound characterization with NMR, mass spectrometry, IR, and HPLC or LC-MS, plus the ability to interpret the data.
  • Comfort with cheminformatics and scientific AI tools; coding is not required.
  • Availability for at least 20 hours per week during weekdays.
  • Clear written communication for explaining technical decisions.
  • Bonus: experience with SMILES or SMARTS, grading rubrics, benchmark design, or evaluation of scientific AI models or agents.

Who Should Apply

Chemists with a PhD and at least three years of lab work fit this role, particularly people who have run multi-step small-molecule routes and interpreted NMR, MS, IR, and LC-MS data. Candidates who enjoy explaining chemical reasoning in writing and have used SMILES or built grading rubrics will stand out.

Salary Insight

Pay runs from $70 to $100 per hour for this part-time engagement, with the employer of record listed as Cincinnatus LLC or an international entity. That band places strong weight on hands-on synthetic and analytical chemistry experience, so candidates with a PhD plus several years in industry or a research group should expect to land toward the upper end.

Pay and demand for AI Training roles

Market estimates from live NearSkill listings — separate from this job's published terms.

Aggregated

This role · as published

$70–100/hr

Taken from the listing itself.

Typical pay · estimated

$68/hour

Median of 1,191 similar roles that publish pay · 300 publish only a top rate; those count at the rate they gave

Most AI Training roles pay $38–$95 per hour. This role's pay falls inside that range.

Typical rangeMedian payThis role

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Required skills

ChemistrySynthetic ChemistryOrganic ChemistryMedicinal ChemistryAnalytical ChemistryPhysical ChemistrySmall Molecule SynthesisReaction MechanismsStructure ElucidationReaction OptimizationNmrMass SpectrometryIr SpectroscopyHplcLc MsCheminformaticsSmilesSmartsSpectroscopic CharacterizationBenchmark DesignGrading RubricsAI Model EvaluationData QualityExperimental DesignScientific AI Tools

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