Bilingual Spanish STEM Expert (Physics, Biology, or Chemistry)

Mercor is seeking a Bilingual Spanish STEM Expert who is native to the United States (Spanish-speaking), Spain, Chile, or Mexico, with experience in biology / physics / chemistry theory and problem-solving, to develop and refine high-quality reasoning questions that evaluate AI models.

Your expertise in biology / physics / chemistry will ensure the scientific accuracy, rigor, and instructional quality of these assessment items. You will create and evaluate Spanish/English prompts and responses, ensuring scientific precision while maintaining clear, natural Spanish phrasing consistent with academic conventions in the United States (Spanish-speaking), Spain, Chile, or Mexico, and alignment with English where needed.

Job Details

Design and Optimize STEM-Based Prompts (Bilingual)

Create detailed prompts in Spanish and/or English with multiple constraints and scientifically accurate instructions.

Define and Document Evaluation Standards

Establish high-level expectations for correct responses in STEM contexts, and develop comprehensive rubrics that account for scientific rigor and—when written in Spanish—linguistic clarity, regionally appropriate terminology (United States [Spanish-speaking], Spain, Chile, or Mexico usage), and academic tone.

Conduct Model Testing and Grading (Bilingual)

Run prompts through AI models and assess preliminary outputs against expectations for scientific accuracy, reasoning quality, and clarity. Compare Spanish and English responses where needed.

Support Benchmarking and Quality Assurance

Collaborate in QA review processes to ensure prompt tasks and rubrics meet scientific standards. Maintain consistency and reliability across Spanish-language benchmarks prior to integration into official evaluation sets.

Minimum Qualifications

• Native-level fluency in Spanish (written), specifically native to the United States (Spanish-speaking), Spain, Chile, or Mexico

• Strong reading and writing proficiency in English

• BS or BA in Biology / Physics / Chemistry

• Familiarity with undergraduate-level biology / physics / chemistry topics

• Strong writing and critical thinking skills

• Ability to work independently and meet deadlines

Preferred Qualifications

• 2+ years of experience in teaching, research, or an applied STEM discipline field

• Experience working with Spanish-language STEM curricula or academic standards in the United States, Spain, Chile, or Mexico

Application & Onboarding Process

• Complete a short AI-led interview (approximately 15 minutes)

• If approved, complete a paid assessment focused on writing and rubric creation

• Then, if selected, you will be invited to work on the project.

More Details About This Role

• Expected commitment: Minimum 20 hours per week

• Expected duration: Approximately 3–6 months

• Work environment: Structured project setting with clear goals and tools

We consider all qualified applicants without regard to legally protected characteristics and provide reasonable accommodations upon request.

Contract and Payment Terms

• You will be engaged as an independent contractor.
• This is a fully remote role that can be completed on your own schedule.
• Projects can be extended, shortened, or concluded early depending on needs and performance.
• Your work at Mercor will not involve access to confidential or proprietary information from any employer, client, or institution.
• Payments are weekly on Stripe or Wise based on services rendered.
• Please note: We are unable to support H1-B or STEM OPT candidates at this time.

About Mercor

Mercor partners with leading AI labs and enterprises to train frontier models using human expertise. You will work on projects that focus on training and enhancing AI systems. You will be paid competitively, collaborate with leading researchers, and help shape the next generation of AI systems in your area of expertise.