Use your Machine Learning expertise to train and evaluate AI models.
Work remotely on Ruby software engineering tasks that test how well large language models fix bugs and navigate real repositories. This contractor role requires 20 or more hours weekly and is open across nine countries.
Posted Jul 20, 2026
Review and improve AI-generated C and C++ code, develop backend components, and guide technical work on dialogue-agent systems. This worldwide contract role offers part-time work of 20 or more hours per week.
Posted Jul 17, 2026
Work 20+ hours a week evaluating how language models handle real Go code, GitHub issues, and bug fixes. This contract role needs at least three years of software engineering experience and is open in nine countries.
Posted Jul 17, 2026
Build and review code used to train and evaluate AI models with Python and JavaScript or TypeScript. This worldwide contractor role requires 20+ hours each week and fluent English.
Posted Jul 17, 2026
Analyze machine learning data, metrics, model outputs, and benchmark failures as a remote MLE Bench Data Analyst. This three-month contractor role requires 20 hours per week and is open in 10 countries.
Posted Jul 16, 2026
Build and validate Python data pipelines, process structured and unstructured data, and create evaluation tasks for AI systems. This 20-plus-hour contract is open to candidates in selected countries.
Posted Jul 16, 2026
Evaluate how well LLMs fix real software bugs by setting up repositories, reviewing tests, and running Python code locally. This part-time contract role requires 20+ hours each week and is open in nine countries.
Posted Jul 16, 2026
Evaluate AI models, rank responses, build training datasets, and develop Python solutions in a remote contractor role. Choose 20, 30, or 40 hours per week with daily Pacific Time overlap.
Posted Jul 16, 2026
Review AI-generated Python code and machine learning workflows, assess quality against detailed rubrics, and guide remote contributors. This US contractor role pays $120 per hour and requires 20+ hours per week.
Posted Jul 9, 2026
Review AI-generated data science content, code, models, and QA work as a remote Data Scientist Team Lead. This US contractor role pays $110 per hour and requires 20+ hours per week.
Posted Jul 8, 2026
Review AI-generated data science reasoning, code, and model outputs, write reference solutions, and compare responses for accuracy. This remote contractor role pays $60 to $100 per hour and requires professional data science experience.
Posted Jul 8, 2026
Develop and improve machine learning models with Python, MongoDB, large datasets, and evaluation methods. This remote contractor role pays $80 to $140 per hour and is open across multiple countries.
Posted Jul 3, 2026
Use expert Python, SQL, statistics, machine learning, and GenAI skills to create and verify realistic data science problems. This global, project-based contractor role pays $15 to $40 per hour.
Posted Apr 5, 2026
Create and verify challenging computational machine learning and STEM problems using Python, statistics, SQL, and GenAI methods. This global contract role pays $40 per hour and requires 20+ hours weekly.
Posted Apr 5, 2026
Build and improve automation workflows that use large language models. You will write prompts, review model outputs, and refine evaluation methods while working 20 or more hours each week.
Posted Mar 29, 2026
Design realistic tests for AI agents, define expected behavior, and review model outputs. This part-time contract pays $18 to $24 per hour and requires 20 or more hours each week.
Posted Jan 13, 2026
Design and verify complex Python and SQL problems that test full-pipeline data science skills for advanced AI systems. This worldwide contractor role pays $50 per hour for fewer than 20 hours per week.
Posted Dec 3, 2025
Evaluate and attack AI models and agents to find safety risks and security flaws. This flexible remote contract pays $40 per hour for less than 20 hours per week.
Posted Nov 17, 2025
Work remotely on part-time LLM security projects for $40 per hour. Design attacks, test AI agents and RAG pipelines, and document risks using your cybersecurity and penetration testing skills.
Posted Oct 6, 2025
Build Python infrastructure for LLM training and agent evaluation, including secure sandboxes, task frameworks, and scoring pipelines. This remote contract offers 20+ hours weekly and $34 to $42 per hour in the US or Canada.
Posted Jul 25, 2025
Build and maintain Python infrastructure for LLM training and agent tooling, including secure sandboxes, CI/CD pipelines, and testing systems. This remote contract role offers $12.50 per hour and requires at least 20 hours per week in eligible countries.
Posted Jul 25, 2025
Machine Learning expertise may be applied to preparing or reviewing examples for artificial-intelligence systems. Depending on the individual assignment, that can include writing or rating model responses, evaluating search results, reviewing code, annotating images or video, transcribing or recording audio, or translating text. The individual posting defines which activities apply and what the project asks you to do, so read it before deciding whether to explore a role.
OpenTrain is the hiring organization for roles on OpenTrain. Candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support. Hiring, eligibility, responsibilities, and other requirements are specific to each role, so use the individual live posting as the source for those details.
