This role will lead the development of machine learning systems to detect fraud, abuse, and trust violations across Scale’s contributor platform. As a core part of our Generative AI data engine, these systems are critical to ensuring the quality, safety, and reliability of the data used to train and evaluate frontier models. You will build scalable ML services that analyze behavioral and content signals, incorporating both classical models and advanced LLM-based techniques. This is a high-impact, product-focused role where you’ll collaborate across engineering, product, and operations teams to proactively surface misuse, defend against adversarial behavior, and ensure the long-term health of our human-in-the-loop data workflows. Responsibilities include designing and deploying machine learning models to detect fraud, quality issues, and violations in large-scale contributor workflows; building real-time and batch detection systems that evaluate account, behavioral, and content-level signals; combining traditional ML techniques with LLMs and neural networks to improve detection capabilities and reduce false positives; creating robust evaluation frameworks and actively tuning for extremely imbalanced detection scenarios; and collaborating closely with product and engineering teams to embed detection systems into contributor-facing workflows and backend infrastructure. Candidates should have 3+ years of experience building and deploying ML models in production environments, experience with trust & safety, fraud detection, abuse prevention, or adversarial modeling, proficiency in ML and deep learning frameworks such as scikit-learn, PyTorch, TensorFlow, or JAX, familiarity with LLMs and experience applying foundation models for structured downstream tasks, strong software engineering fundamentals, and excellent communication skills. Nice to have qualifications include hands-on experience designing or scaling trust & safety detection systems, familiarity with data quality pipelines or contributor platform risk analysis, contributions to open-source LLM fine-tuning efforts or internal LLM alignment projects, and research or published work in top ML venues.

The following information provides an overview of the skills, qualities, and qualifications needed for this role. Seniority level Seniority levelMid-Senior level Employment type Employment typeFull-time Job function Job functionEngineering and Information Technology IndustriesSoftware Development Referrals increase your chances of interviewing at Scale AI by 2x Get notified about new Machine Learning Engineer jobs in Seattle, WA . Bellevue, WA $130,000.00-$200,000.00 1 week ago Seattle, WA $99,500.00-$187,000.00 1 week ago Seattle, WA $100,000.00-$220,000.00 5 months ago Software Developer-Artificial Intelligent/Machine Learning Seattle, WA $158,200.00-$185,000.00 3 weeks ago Redmond, WA $100,600.00-$258,000.00 2 weeks ago Bellevue, WA $130,000.00-$170,000.00 1 month ago Seattle, WA $112,725.00-$177,840.00 1 week ago Seattle, WA $176,600.00-$225,900.00 5 days ago Data Scientist – AI/ML Recommendations & Personalization Redmond, WA $100,600.00-$215,400.00 2 weeks ago Software Engineer - AI/ML, Multiple Locations Redmond, WA $84,200.00-$180,400.00 1 week ago Machine Learning Engineer, Monetization EngineeringMachine Learning Engineer, Payments ML Accelerator Seattle, WA $212,000.00-$318,000.00 6 days ago Seattle, WA $167,000.00-$185,500.00 2 weeks ago Redmond, WA $100,600.00-$215,400.00 2 weeks ago Redmond, WA $100,600.00-$215,400.00 2 weeks ago Redmond, WA $100,600.00-$215,400.00 1 week ago Bellevue, WA $145,000.00-$204,000.00 3 days ago Redmond, WA $100,600.00-$215,400.00 1 week ago Redmond, WA $100,600.00-$215,400.00 2 weeks ago Software Engineer, Machine Learning (All levels) Seattle, WA $120,000.00-$300,000.00 3 days ago Machine Learning Engineer, Core Engineering Seattle, WA $140,000.00-$220,000.00 1 month ago Machine Learning Engineer Graduate (TikTok E-Commerce - Conversational AI)-2025 Start (BS/MS) Seattle, WA $112,725.00-$177,840.00 5 days ago Seattle, WA $147,000.00-$259,000.00 2 weeks ago Seattle, WA $112,725.00-$177,840.00 1 week ago Bellevue, WA $147,000.00-$259,000.00 2 weeks ago Bellevue, WA $129,300.00-$223,600.00 3 days ago Machine Learning Engineer, Forecast Platform Bellevue, WA $71,200.00-$127,200.00 1 month ago Redmond, WA $100,600.00-$215,400.00 2 weeks ago We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

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