Senior/Staff Applied ML Engineer - AI/ML Evaluation & Simulation

Role Number: 200616697-3337 Summary We're building the next generation of AI evaluation systems - and we're looking for a hands-on engineer who can bridge ML, software, and product to make AI systems more measurable, testable, and trustworthy. We're part of the AI/ML Evaluation organization, seeking a Senior or Staff-level Applied ML Engineer with strong software engineering skills and a solid understanding of machine learning. In this hands-on role, you'll help design and build intelligent systems that simulate complex interactions (including agentic workflows powered by LLMs), develop tools for extracting structured insights, and create robust evaluation datasets. You'll also contribute to building scalable platforms for simulation and behavior analysis. This role sits at the intersection of ML, engineering, and product - ideal for someone passionate about bringing clarity and rigor to real-world AI performance. Description We're looking for a pragmatic engineer who thrives at the intersection of machine learning and software development - capable of building robust, scalable systems that support evaluation and development of advanced AI capabilities, including large language models and agentic behaviors. A successful candidate is comfortable navigating ML, systems, and product domains. You bring strong software engineering fundamentals, experience building and maintaining end-to-end pipelines, and a practical understanding of how to evaluate AI systems in real-world contexts. You're curious about how LLMs behave in interactive or agentic settings, thoughtful about evaluation design, and eager to build tools that improve visibility and trust in AI. Above all, you enjoy collaborating across disciplines and bringing structure to complex, evolving problems. Minimum Qualifications 8+ years of experience in software engineering, ML engineering, or applied ML roles Proficiency in Python or another modern programming language (e.g., Java, Go, Swift) Experience building and maintaining production-grade systems Solid understanding of machine learning concepts, especially LLMs and their applications Excellent communication and collaboration skills with cross-functional partners Preferred Qualifications Experience working on AI evaluation systems, LLM-based simulations, or agentic AI frameworks Background in building tools for data analysis, model evaluation, or synthetic data generation Familiarity with metrics instrumentation and observability in ML systems Experience designing pipelines for AI/ML workflows Exposure to applied research, generative models, or real-time systems Understanding of how model quality connects to product outcomes and user experience Apple is an equal opportunity employer that is committed to inclusion and diversity. We seek to promote equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics. Learn more about your EEO rights as an applicant (https://www.eeoc.gov/sites/default/files/2023-06/22-088_EEOC_KnowYourRights6.12ScreenRdr.pdf) .