Chemist

What you'll do

You check how AI models handle applied chemistry: synthesis, analysis, laboratory practice and materials. For each question you judge the answer's procedure and conclusion, write the prompt and a professional-level reference answer where needed, and flag anything unsafe or wrong, explaining the correct approach. You apply project rubrics consistently and review other experts' work for accuracy.

Of the three chemistry listings on Rex.Zone, this one is the practitioner's. It asks for a chemistry degree plus real laboratory or industry experience and a strong grasp of lab safety, rather than a doctorate or a research subspecialty.

Who fits

• A degree in chemistry or the chemical sciences, with no particular level stated
• Professional laboratory or industry experience (the ad gives no minimum number of years)
• Strong knowledge of laboratory safety, which matters because flagging unsafe guidance is part of the job
• Excellent written English and the ability to work independently to deadlines
• Preferred: hands-on analytical instrumentation (NMR, HPLC, GC-MS), safety or regulatory training, and earlier AI-training work

What it pays

Rex.Zone states USD $70–125 per hour, adjusted by country of residence. The $70 floor is $20 above the Chemistry Expert listing's $50 and the Chemistry Specialist's $50, though the $125 ceiling sits $25 below the Chemistry Expert's $150. The adjustment method is not published, so the upper end may not apply everywhere. The ad does not say how often or by what method you are paid.

Worth knowing

Good:

• Open worldwide with no country restriction listed
• A degree, not a doctorate, is enough if you have solid lab or industry time
• The highest minimum of the three chemistry roles
• Your day-to-day lab judgement, especially on safety, is what the work values

Less good:

• Country adjustment is unexplained, and the ad gives no hours or volume
• Content rules are strict: no routes, formulations, quantities or operational detail for chemical, biological, radiological, nuclear or explosive weapons or illicit drugs, and any such material must be reported rather than reproduced. Rex may reject or remove a submission that breaks them
• Nothing confidential from an employer or client may be submitted
• Payment depends on verification and on sanctions, export-control, tax and employment rules, and the contractor agreement covering ownership and licence terms was still marked "to be confirmed by Rex Legal"

About this listing

Posted on the Rex.Zone expert portal (also RemoExperts) on 2 October 2026 and read from the portal on 29 October 2026. The pay band, qualifications and responsibilities are Rex.Zone's own text. The portal lists no skills for this role. Applications go through the portal, which sits behind an entry exam and verified-user checks described on the company page. See Rex.Zone.