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Biology PhD Expert - AI Annotation

The middle of its range, $65/hr, is below the $70/hr median of the Law, Medicine & Finance roles open now, whose typical pay runs $40–$150/hr. How that pay moves week by week is in our research on Law, Medicine & Finance work.

Half of all Law, Medicine & Finance roles come down within 30 days of being listed, and 53.2% are still up after four weeks. This one was posted today.

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About the role

We are looking for PhD-qualified biology experts to contribute their scientific expertise to a short-term annotation project supporting a leading AI lab.

Expert annotation helps AI researchers develop and evaluate how models handle specialized scientific information. This project offers an opportunity to apply your biology background to carefully reviewing and annotating content, using your subject-matter judgment to support accurate, high-quality work.

What you’ll do

  • Complete biology-related annotation tasks in your area of expertise, following the project guidelines.
  • Apply scientific reasoning and attention to detail when reviewing content. Depending on the assignment, this may include assessing accuracy, identifying unclear statements or flagging potential errors.
  • Use a consistent approach to the annotation criteria and flag questions or ambiguities that need clarification.

Who should apply

  • A completed PhD in biology or a related biological discipline.
  • Experience working in any field of biology, through research, professional work or both.
  • Careful scientific judgment and the ability to explain biology concepts clearly.
  • Availability to start within the next two weeks.

Applicants from all biology subfields are welcome. Examples include molecular and cell biology, genetics and genomics, microbiology, biochemistry, immunology, neuroscience, ecology and evolutionary biology. These are illustrative examples, not a restricted list of specialties.

Project commitment

The initial scope is 20 hours of annotation per contractor, on average around 10 hours per week over two weeks.

Compensation

$40–90 USD per hour. Final rate depends on qualifications, expertise, experience and location.

Where you can work

This role is 100% remote, for applicants located in these 51 countries: Andorra, Albania, Austria, Åland Islands, Bosnia and Herzegovina, Belgium, Bulgaria, Canada, Switzerland, Cyprus, Czechia, Germany, Denmark, Estonia, Spain, Finland, Faroe Islands, France, United Kingdom, Guernsey, Gibraltar, Greece, Croatia, Hungary, Ireland, Isle of Man, Iceland, Italy, Jersey, Liechtenstein, Lithuania, Luxembourg, Latvia, Monaco, Moldova, Montenegro, North Macedonia, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Sweden, Slovenia, Slovakia, San Marino, Ukraine, United States and Vatican City.

From Braintrust's job posting, checked 5 Nov 2026.

About Braintrust

Keep all of your pay: published per-role bands, no talent fees.

How it pays: Weekly, and talent keeps 100%, says its AI training page (read 1 Nov 2026); its help center says talent is paid by invoice when the client pays, on standard net-30 terms, through Wise and Stripe (read 1 Nov 2026). Braintrust itself pays only to bank accounts in the 35 countries on its payments list (8 in the Americas, 14 in Europe, 8 in Asia-Pacific, 5 in the Middle East and Africa; help center article updated 26 Jul 2026, read 1 Nov 2026); with an account elsewhere you see only the roles whose client pays you directly.

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