Biology PhD Expert – AI Annotation
$40–90/hr
Remote part time science contract with Braintrust, $40–90/hr, open to people in United States, Canada, France and 5 more countries. Posted Nov 5.
$40–90/hr
Apply on BraintrustIs this job worth applying to?
- Pay
- About typicalTops out at $90/hr. The typical top rate across 106 priced science listings is $90/hr.
- Getting in
- Some screening~30–60 min profile + AI interview. Professional experience in your field.
- Steady work
- Work is patchyLong waits between tasks are common.
- Payout record
- Pays on timeSchedule: weekly. Paid via Not specified on the AI training page.
- Freshness
- FreshPosted 1d ago. Still listed on Braintrust on Nov 6, 2026.
- Where you live
- Named countries onlyOpen in United States, Canada, France and 5 more.
The job description
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.
How do you apply to Braintrust?
Apply on Braintrust
The Apply button opens this post on Braintrust's own site. You apply with them, not with Rubric. Budget about 30–60 min profile + AI interview.
Get through screening
What Braintrust asks for after you apply:
- Complete the AI skills interview
- Browse and accept AI training tasks in your dashboard
Start work and get paid
Pay schedule: weekly. Paid via Not specified on the AI training page. You're paid for the work they hand out, not a fixed salary.
Braintrust also needs
- Professional experience in your field
- Complete profile
Red flags
None on record for Braintrust. A real platform never asks you to pay for training, equipment or a "starter kit".
What is Braintrust like to work for?
Freelance talent network that now also runs AI training work, matching professionals to rating, red-teaming and code-review tasks after an AI skills interview.
| Advertised pay | $20–200/hr |
|---|---|
| Getting in | Some screening |
| Application takes | ~30–60 min profile + AI interview |
| How you get paid | Weekly, via Not specified on the AI training page |
| Payout record | Pays on time |
| Countries | Remote and open to freelancers in many countries with pay in USD; India eligibility for AI training tasks is not confirmed. |
Braintrust lists $20–45/hr for data labeling, $25–60/hr for RLHF rating and up to $200/hr for expert code review; listings average around $50/hr.
