Prolific

Prolific is a platform that enables researchers to quickly find trustworthy research participants. With a pool of over 120,000 active and verified participants, Prolific ensures high-quality responses through continuous monitoring and engagement. The p...

Professional Services

Industrials

51-250 (240)

Founded 1997

$0M raised

3 open positions

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Lead Applied Scientist

3 months ago

United Kingdom

Contract

Lead

Data Scientist

Data Science and Analytics

LLM Machine Learning Python Statistics

Apply Now

Prolific

Professional Services

51-250

Founded 1997

$0M raised

View All Jobs 3

Description

Prototype AI/ML methods to improve human data quality, judgment aggregation, and AI evaluation workflows.
Design experiments, benchmarks, and reliability tests to assess quality, efficiency, and customer outcomes.
Apply classical machine learning, statistics, LLMs, and agentic techniques to practical problems.
Use modern AI tools to accelerate prototyping, experimentation, and iteration.
Partner with product and engineering teams to turn scientific methods into scalable platform capabilities.
Communicate technical assumptions, trade-offs, and recommendations to both technical and non-technical stakeholders.
Translate ambiguous product and customer problems into clear hypotheses, experiments, metrics, and reusable methodologies.

Requirements

PhD or MSc in Computer Science, Mathematics, Statistics, Machine Learning, or a related field.
3+ years of applied ML, AI research, or data science experience with demonstrated real-world impact.
Experience with human-in-the-loop AI systems, including RLHF, annotation pipelines, data quality modelling, judgment aggregation, benchmarks, or AI evaluation.
Fluency with modern LLM and agentic techniques such as Retrieval-Augmented Generation (RAG), LLM-as-judge, multi-agent workflows, synthetic data generation, and automated quality review.
Strong Python skills and the ability to quickly build, test, and iterate on working prototypes.
Strong judgment on when to use simple statistical methods, classical ML, LLMs, or agentic approaches.
Experience partnering with product and engineering teams and strong cross-functional communication skills.
Ability to work on ambiguous problems and turn them into clear methodologies and metrics.
Fixed-term contract position for 12 months.
Experience in human-in-the-loop AI systems is preferred.

Benefits

Competitive salary.
Remote working.
Benefits package.
Mission-driven culture.
Access to Prolific's unique human data platform.
Opportunities for groundbreaking research.

Interested in this position?

Apply directly on the company website

Apply Now

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