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Hiring now · posted today Tech Contract · On-site / hybrid

Senior Data Scientist and Data Engineering Experts

$120–$180/hr

Published pay. The final rate depends on your test, experience and country.

United States Language: English Posted 27 Oct 2026

About this role

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Role Overview our partner is working with a leading AI research lab on a project to improve how AI systems do real-world data science and data engineering work. We’re looking for senior data scientists and data engineers who have deep experience at top technology, quantitative or financial firms. You’ll use that expertise to train and evaluate frontier AI models. This role is open to candidates based in the United States, United Kingdom, Canada, Australia or New Zealand. Key Responsibilities

  • Designing realistic, challenging data science and data engineering tasks, including but not limited to exploratory analyses, statistical modeling, machine learning pipelines, ETL and data pipeline design, SQL and Python workflows, and experimentation or A/B test write-ups

  • Illustrating "what good looks like" by writing precise, task-specific criteria for data science and data engineering deliverables

  • Applying consistent, evidence-based judgment so that assessments are reproducible and defensible

  • Taking structured feedback from senior reviewers and iterating on submitted work

Ideal Profile

  • 4+ years of professional data science, data engineering or machine learning experience in one of these settings:

    • A leading technology or quantitative firm (such as FAANG+, Magnificent 7+, top-tier quant funds or equivalent) with a Mid-senior level title. Applied Scientist, Research Scientist and Machine Learning Engineer/Scientist roles also qualify.

    • A top financial institution (a leading bank, hedge fund or trading firm)

    • A top-tier consulting firm, working as a data scientist

    • A Fortune 100 company, with a senior or manager-level title

    • Experience may be split across more than one qualifying employer

  • 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

  • A detail-oriented, consistent approach to evaluating complex work

  • Comfortable receiving feedback and calibrating judgment against set standards

Location: United States.

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What to know before you apply

Pay
At the published rate, 10 hours a week would be about $1,200–$1,800 and 20 hours about $2,400–$3,600 before tax. Hours depend on the project, so treat this as a ceiling, not a promise.
Location
Only applicants located in United States can be paid for this role. Platforms usually verify where you are, so apply only if you are based there.
Credentials
The listing asks for 4+ years of experience. Put it in the first line of your profile: reviewers screen for it before anything else.
Timing
This listing is new today. Projects can close once they have enough people, so it is worth applying while it is open.
Test tips for data scientists
  • Check data leakage, metric choice and baselines before anything else.
  • Rebuild key numbers in a notebook when you can.
  • Explain trade-offs in plain language; reviewers value clarity.
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