Mercor · Finance & specialist
STEM Expert, Spanish (Spain) - AI Training - review AI outputs in your specialty
Listed on Mercor as “STEM Expert, Spanish (Spain) - AI Training”
What this actually is
You bring your specialist expertise to AI evaluation. The shape of the work varies but the pattern is the same: review outputs, rate quality, write prompts, flag errors. The platform title (STEM Expert, Spanish (Spain) - AI Training) reflects the rate band and the expertise required, not the day-to-day work.
Can you do this on your visa?
F-2 / F-4 / F-5 / F-6: open. E-1 to E-7: needs concurrent-employment permit. D-2 / D-4 students: S-3 permit, 20 hr/week cap. D-10 / D-8: case by case.
Korean tax on USD income
First 5 years in Korea: foreign-source income only taxed if remitted into Korea. After year 5: worldwide income. Full tax guide.
Original posting from Mercor
We're looking for experienced scientists and engineers who are native or fluent in Spanish to help train and evaluate AI agents on realistic professional tasks. You'll build workspaces and files, write prompts, and create grading rubrics based on real stem work as it's done in Spain.
Requirements
- 5+ years as a scientist or engineer in research or industry (master's or PhD a plus)
- Native or fluent in Spanish
- Degree from a top-20 university in Spain
- Comfortable with quantitative analysis, technical documentation and data-heavy problem solving
Details: Remote, about 21 hours per week, hourly, pilot running Oct 23 to Nov 19.
Quoted from Mercor’s public listing on 2026-10-14.We don’t edit platform copy; honest framing is in the title and the “what this actually is” block above.
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About Mercor
AI-interview-based talent network. One application, voice interview with their AI, then matched to projects across coding, research, and specialist work. Pay scales with track and seniority.
Mercor review: AI-interview talent network
4.1/5 on Glassdoor, fastest-growing platform in the category (+509% YoY). What the AI video interview actually asks, real pay across coding/research/medical/legal/finance tracks ($25-$200/hr), and the project-availability problem.
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