Machine Learning Engineer

Boston

**Machine Learning Engineer (AI Data Trainer)** **About The Role** What if your expertise in machine learning could directly shape how the next generation of AI models reason, plan, and solve real-world problems? We're looking for Machine Learning Engineers to help train cutting-edge AI by demonstrating how expert technical minds actually think --- step by step, tool by tool, decision by decision. This is a fully remote, flexible contract role built for experienced ML and engineering professionals who want to put their deep technical knowledge to work at the frontier of AI development. * Organization: Alignerr * Type: Hourly Contract * Location: Remote * Commitment: 10--40 hours/week **What You'll Do** * Construct precise, well-structured reasoning logs that walk through sophisticated technical problems from start to finish * Document sequential decision-making workflows --- how you strategize, select tools, and adapt your approach * Generate high-quality training data that shows AI models what expert-level problem-solving actually looks like * Audit and refine AI-generated reasoning chains to identify gaps, errors, or logical inconsistencies * Demonstrate proficient tool use across complex ML and engineering scenarios * Work independently and asynchronously --- fully on your own schedule **Who You Are** * Professional background in Machine Learning, Software Engineering, or a closely related technical discipline * Exceptional ability to articulate complex reasoning and methodologies in a clear, structured way * Strong critical thinking skills --- you can evaluate a line of logic and spot exactly where it goes wrong * Comfortable working independently on intellectually demanding, task-based assignments * Master's Degree or PhD in a relevant technical field **Nice to Have** * Prior experience with data annotation, data quality assurance, or AI evaluation workflows * Familiarity with large language models (LLMs) and how they're trained or fine-tuned * Background in technical writing, documentation, or instructional design * Experience working across multiple ML frameworks or toolchains **Why Join Us** * Work directly with leading AI research labs on genuinely cutting-edge projects * Fully remote and flexible --- work when and where it suits you * Freelance autonomy with the structure of meaningful, high-impact technical work * Rare inside access to how frontier LLMs are built and trained * Potential for ongoing work and contract extension as new projects launch