Senior Data Scientist - Ai Expert

Mercor; San Francisco (CA); Hybrid; GBP 123,000 - 185,000; Part time

Job summary

Mercor is seeking a Senior Data Scientist and Data Engineering Expert for a remote contract role. The candidate will design data science and data engineering tasks, craft precise evaluation criteria, and iterate on feedback to improve AI models.

Strong Python/SQL, ML, experimentation, and causal inference are required, with a Bachelor's degree from an English-speaking country. Applicants should have 4+ years of relevant experience and be able to communicate complex findings clearly in written

Qualifications

• 4+ years of professional data science, data engineering, or ML experience.
• Strong command of Python, SQL, statistical modeling, ML, experimentation and causal inference.
• Proven ability to turn messy real-world data into rigorous analyses and reliable pipelines.
• Excellent written English, including the ability to explain technical findings clearly.
• Bachelor's degree from an English-speaking country.
• Detail-oriented, consistent approach to evaluating complex work.

Responsibilities

• Design realistic, challenging data science and data engineering tasks, including exploratory analyses, statistical modeling, ML pipelines, ETL, and data pipeline design.
• Illustrate what good looks like by writing precise criteria for data science and data engineering deliverables.
• Apply evidence-based judgment to ensure assessments are reproducible and defensible.
• Take structured feedback from senior reviewers and iterate on submitted work.
• Train and evaluate frontier AI models using expertise from top tech or finance firms.
• Work independently and asynchronously to improve AI model performance.

Skills

Python

SQL

Statistical Modeling

Machine Learning

Experimentation

Causal Inference

Data Science

Data Engineering

Written English

4+ years experience

Education

Bachelor's degree from English-speaking country

Job description

About the job

Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo, Larry Summers, and Jack Dorsey.

Position: Senior Data Scientist and Data Engineering Experts
Type: Contract
Compensation: $120–$180/hour
Location: Remote

Role Responsibilities

• Design realistic, challenging data science and data engineering tasks, including exploratory analyses, statistical modeling, machine learning pipelines, ETL, and data pipeline design.
• Illustrate "what good looks like" by writing precise, task-specific criteria for data science and data engineering deliverables.
• Apply consistent, evidence-based judgment to ensure assessments are reproducible and defensible.
• Take structured feedback from senior reviewers and iterate on submitted work.
• Train and evaluate frontier AI models using expertise from top technology, quantitative, or financial firms.
• Work independently and asynchronously to improve AI model performance.

Qualifications

Must-Have

• 4+ years of professional data science, data engineering, or machine learning experience.
• Strong command of Python, SQL, statistical modeling, machine learning, experimentation, and causal inference.
• Proven ability to turn messy real-world data into rigorous analyses and reliable pipelines.
• Excellent written English, including the ability to explain technical findings clearly.
• Bachelor's degree from an English-speaking country.
• Detail-oriented, consistent approach to evaluating complex work.

Application Process (Takes 20–30 mins to complete)

• Upload resume
• AI interview based on your resume
• Submit form

Resources & Support

• For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome
• For any help or support, reach out to: [e-mail]

PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.