
Scientific / ML Engineer
Listing checked November 12, 2026 · pay as published by Mercor
Key details
- Pay
- $90–140/hr
- Location
- Remote · United StatesUnited States
- Job type
- part-time
- Openings
- 15
- Posted
- November 9, 2026
Overview
Mercor places engineers inside a top AI lab's GenAI group, where the work centers on building foundation models from scratch. You will spend your time on the data side of that effort: writing hard machine learning and scientific computing problems, solving them, and judging whether other solutions hold up. Day to day you lean on PyTorch, JAX or TensorFlow plus a strong Python stack built on NumPy, pandas and scikit-learn. The engagement runs through Cincinnatus LLC as a W-2 arrangement, with a schedule that asks for at least 20 hours on weekdays.
What You'll Do6
- Spot gaps in what research and engineering teams know about model training, evaluation, and numerical software, then design work that closes them.
- Write demanding, domain-specific machine learning and scientific computing tasks with clean, well-structured reference answers.
- Review submitted ML and scientific computing solutions and give precise written technical feedback.
- Build and assess tasks that cover experiment design, data pipelines, model training and scientific simulations, each with a solution that actually runs.
- Create rubrics that test whether ML and scientific work is methodologically sound, correct and reproducible.
- Work alongside other subject matter experts to keep training data consistent and accurate.
Requirements6
- 4 or more years of focused professional or research work in machine learning, data science or scientific computing at a top-tier organization or research university. An MS or PhD in a quantitative field counts toward that total.
- Hands-on production or research use of PyTorch, JAX or TensorFlow.
- Strong Python skills with NumPy, pandas and scikit-learn.
- A track record of progressing through increasingly senior work.
- Availability for at least 20 hours per week on weekdays.
- Clear writing, with the ability to walk a reader through complex technical decisions.
Preferred Qualifications3
- Published research in ML or a related quantitative field.
- Open-source contributions to ML or scientific computing projects.
- ML systems shipped to production.
Who Should Apply
Researchers and engineers with 4+ years in machine learning or scientific computing who can reason about model training, experiment design and reproducibility, and who write clearly enough to defend those judgments in review. Candidates holding an MS or PhD in a quantitative field fit well, as do people who have shipped real ML systems.
Salary Insight
The posted range is $90.00 to $140.00 per hour, which sits high for part-time contract work and matches the seniority the role asks for: 4+ years plus a graduate degree in many cases. Expect the final rate to track your research record and framework depth.
Pay and demand for AI Training roles
Market estimates from live NearSkill listings — separate from this job's published terms.
This role · as published
$90–140/hr
Taken from the listing itself.
Typical pay · estimated
$70/hour
Median of 1,433 similar roles that publish pay · 305 publish only a top rate; those count at the rate they gave
Most AI Training roles pay $40–$100 per hour. This role's pay sits above that range.
Rates shown per hour. Yearly and monthly pay converted; one-time fees and non-USD pay are not included.
- Live similar roles
- 1,652
- Listed in last 30 days
- 836
- Remote
- 97%
Hiring most right now: micro1 (507) · SME Careers (258) · Mercor (216)
Most requested skills · share of roles
- ai evaluation13%
- python12%
- llm evaluation11%
- data annotation10%
Figures from AI Training roles live on NearSkill when this page loaded. A role can close before you apply, so check the listing itself.
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