Senior Machine Learning Expert

Alignerr Corp.; France; Remote; EUR 83,000 - 165,000; Part time

Job summary

Alignerr is seeking a Senior Machine Learning Expert to train cutting-edge large language models, focusing on step-by-step reasoning, tool usage, and reliable decision making in real-world scenarios. This is a fully remote, hourly contract suitable for senior ML practitioners seeking challenging, impactful AI problems.

Join us to author complex reasoning traces, design structured workflows, and mentor trace quality while developing data strategies for multi-step problem solving on high-stakes AI

Qualifications

• Experienced ML practitioner with hands-on ML/AI expertise.
• Ability to decompose complex problems into clear steps.
• Familiar with LLM evaluation and training methodologies.
• Strong written communication and self-motivation.

Responsibilities

• Author complex, high-fidelity reasoning traces that capture how an LLM plans, uses tools, and makes decisions step by step.
• Design and document structured reasoning workflows for sophisticated real-world technical tasks.
• Review and mentor reasoning trace quality to ensure clarity, logical consistency, and optimal decision-making patterns.
• Develop data strategies that help LLMs navigate intricate, multi-step problem-solving scenarios.
• Apply senior-level architectural insight to ensure the data you produce drives reliable, trustworthy model behaviour.

Skills

Senior ML practitioner

Problem decomposition

LLM evaluation

Written communication

Independent work

Job description

Senior Machine Learning Expert (AI Training)

About The Role

What if your deep expertise in machine learning could directly shape how the next generation of AI systems reason, plan, and solve complex problems?

We're looking for Senior Machine Learning Experts to help train cutting-edge large language models — teaching them to think step by step, use tools effectively, and make reliable decisions in real-world scenarios.

Senior Machine Learning Expert (AI Training)

About The Role

What if your deep expertise in machine learning could directly shape how the next generation of AI systems reason, plan, and solve complex problems?

We're looking for Senior Machine Learning Experts to help train cutting-edge large language models — teaching them to think step by step, use tools effectively, and make reliable decisions in real-world scenarios.

This is a fully remote, flexible contract role built for senior-level ML practitioners who want to work on some of the most technically challenging and consequential AI problems being tackled today.

• Organization: Alignerr
• Type: Hourly Contract
• Location: Remote
• Commitment: 10–40 hours/week

What You'll Do

• Author complex, high-fidelity reasoning traces that capture how an LLM plans, uses tools, and makes decisions step by step
• Design and document structured reasoning workflows for sophisticated real-world technical tasks
• Review and mentor reasoning trace quality to ensure clarity, logical consistency, and optimal decision-making patterns
• Develop data strategies that help LLMs navigate intricate, multi-step problem-solving scenarios
• Apply senior-level architectural insight to ensure the data you produce drives reliable, trustworthy model behaviour

Who You Are

• Experienced machine learning practitioner with significant hands-on expertise in ML, AI, or closely related technical fields
• Skilled at decomposing complex problems into clear, logical, well-documented reasoning steps
• Familiar with advanced LLM evaluation and training methodologies
• Sharp analytical thinker who can bridge deep technical knowledge with structured written communication
• Self-motivated and reliable when working independently and asynchronously

Nice to Have

• Prior experience with data annotation, data quality assurance, or AI evaluation systems
• Top-tier Kaggle competition results (Grandmaster or Master level), demonstrating elite-level model performance and feature engineering expertise
• Familiarity with reasoning trace construction, chain-of-thought prompting, or tool-use training pipelines
• Background in applied AI research or production ML systems

Why Join Us

• Work on some of the most technically advanced AI training projects in the industry alongside leading research labs
• Fully remote and asynchronous — work when and where it suits you
• Freelance autonomy with meaningful, intellectually stimulating work
• Direct impact on how next-generation AI models reason and behave in the real world
• Potential for ongoing work and contract extension as new projects launch