AI Engineer/ML Engineer - Senior Developers - AI Training - Washington DC, US

Prolific Academic Ltd; United States; À distance; USD 83 000 - 110 000; Plein temps

Résumé du poste

Prolific is seeking AI and Machine Learning Engineers to join its Expert Network to help train and evaluate the next generation of LLMs, using deep technical expertise. If successful, you’ll be invited to join Prolific as a participant, where you’ll get paid to train and evaluate powerful AI models from home.

Required: a BS, MS, or PhD in CS/AI/Robotics with ML focus; experience building or fine-tuning ML models; deep learning mastery; RLHF or RAG experience; strong code audit and analytical

Qualifications

• Education: BS, MS, or PhD in Computer Science, AI, Robotics or related field with ML focus.
• Professional experience: building, deploying, or fine-tuning ML models in production.
• Deep Learning mastery: knowledge of transformers, CNNs, RNNs and optimization.
• LLM specialization: hands-on with Prompt Engineering, RLHF or RAG workflows.
• Technical rigor: ability to audit model logic and detect data contamination.
• Analytical critique: strong attention to detail in AI outputs and reasoning.

Responsabilités

• Evaluate LLM architecture logic for technical accuracy.
• Audit ML code and notebooks for efficiency and correctness.
• Refine RLHF frameworks with high-quality human feedback.
• Analyze model reasoning and identify breakdowns in CoT prompts.
• Benchmark model outputs using technical taxonomies and metrics.

Connaissances

Neural networks

Transformers

RLHF

Prompt engineering

Model evaluation

Data contamination audit

Chain-of-thought analysis

Formation

BS/MS/PhD in CS/AI/Robotics

Outils

PyTorch

TensorFlow/Keras

NumPy

Pandas

Scikit-learn

Hugging Face Transformers

Weights & Biases

LangChain

Pinecone

Milvus

Weaviate

Description du poste

AI & Machine Learning Engineer - AI Training

About Prolific

Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world.

Over 35,000 AI developers, researchers, and organizations use Prolific to gather data from paid study participants with a wide variety of experiences, knowledge, and skills.

The role

We’re looking for AI and Machine Learning Engineers to join our Expert Network to help train and evaluate the next generation of LLMs using deep technical expertise. If you have the necessary experience, we’ll send you a quick 10- to 15-minute test to assess your skills and suitability for AI tasks. If successful, you’ll be invited to join Prolific as a participant, where you’ll get paid to train and evaluate powerful AI models.

Researchers looking for your skills tend to pay up to $80 per hour. You must be prepared to complete paid tasks that require one hour of uninterrupted work, though many are shorter.

What you’ll bring

• Education: a BS, MS, or PhD in Computer Science, Artificial Intelligence, Robotics, or a related quantitative field with a focus on Machine Learning.
• Professional Experience: experience building, deploying, or fine-tuning ML models in a production environment.
• Deep Learning Mastery: professional-level understanding of neural network architectures (Transformers, CNNs, RNNs) and optimization techniques.
• LLM Specialization: hands‑on experience with Prompt Engineering, RLHF (Reinforcement Learning from Human Feedback), or RAG (Retrieval-Augmented Generation) workflows.
• Technical Rigor: the ability to audit complex model logic, identify training data contamination, and evaluate mathematical proofs behind ML algorithms.
• Analytical Critique: high attention to detail in spotting “hallucinations,” biased outputs, or logical failures in AI-generated technical content.

What you’ll be doing in the role

• Evaluate LLM Architecture Logic: review AI-generated explanations of model architectures, loss functions, and backpropagation for technical accuracy.
• Audit Code & Notebooks: validate ML-specific code (e.g., training loops, data preprocessing scripts, or model evaluations) for efficiency and correctness.
• Refine RLHF Frameworks: provide the high-quality human feedback necessary to align models with human intent, safety, and helpfulness.
• Analyze Model Reasoning: critically assess how an AI model navigates complex chain-of-thought (CoT) prompts and identify where the reasoning breaks down.
• Benchmark Performance: conduct comparative testing between different model outputs based on specific technical taxonomies and performance metrics.

Key Technologies

• Frameworks: expert proficiency in PyTorch or TensorFlow/Keras.
• Language & Data: advanced Python (NumPy, Pandas, Scikit-learn) and experience with Hugging Face Transformers.
• Cloud & MLOps: experience with AWS (SageMaker), Google Cloud (Vertex AI), or specialized tools like Weights & Biases and LangChain.
• Vector Databases: familiarity with Pinecone, Milvus, or Weaviate for RAG evaluation.

Why Prolific is a great platform to join as a Participant

Joining our Expert Network will give you the chance to influence the AI models of the future using professional legal expertise. Once you pass our assessment, you can join Prolific in just 15 minutes, and start enjoying competitive pay rates, flexible hours, and the ability to work from home.

We’ve built a unique platform that connects researchers and companies with a global pool of participants, enabling the collection of high-quality, ethically sourced human behavioural data and feedback. This data is the cornerstone of developing more accurate, nuanced, and aligned AI systems.

We believe that the next leap in AI capabilities won’t come solely from scaling existing models, but from integrating diverse human perspectives and behaviours into AI development. By providing this crucial human data infrastructure, Prolific is positioning itself at the forefront of the next wave of AI innovation – one that reflects the breadth and the best of humanity.

Links to more information on Prolific

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Privacy Statement

By submitting your application, you agree that Prolific may collect your personal data for recruiting and global organisation planning. Prolific’sCandidate Privacy Noticeexplains what personal information Prolific may process, where Prolific may process your personal information, its purposes for processing your personal information, and the rights you can exercise over Prolific use of your personal personal information.