Evaluation & Insights Machine Learning Engineer

Apple Apple · Big Tech · Cupertino, CA +1 · Software and Services

This role focuses on evaluating and improving AI systems, particularly LLMs and multimodal models, by developing evaluation frameworks, analyzing model behavior, and extracting actionable insights. It involves collaborating with various teams to ensure AI systems are reliable, safe, and aligned with human expectations. The role also includes building MLOps and automation for evaluation pipelines and defining human-centric metrics.

What you'd actually do

  1. Lead Rigorous Model Evaluations: Architect and execute comprehensive evaluation suites for LLMs and multimodal models, identifying edge cases in multi-step reasoning, factuality, adversarial robustness, safety, and alignment.
  2. Advanced Scoring Frameworks: Develop deterministic, heuristic, and LLM-assisted evaluation frameworks (e.g., LLM-as-a-judge, reward modeling) to quantify human-perceived quality metrics (e.g., helpfulness, hallucination rates).
  3. Actionable Signal Extraction: Translate qualitative failure modes into quantifiable loss patterns, programmatic guardrails, and actionable data-mixture adjustments for model training and inference.
  4. Improve Performance: Partner with engineering teams to refine model behavior, leveraging evaluation telemetry to inform prompt engineering, Retrieval-Augmented Generation (RAG) strategies, and model fine-tuning.
  5. Latent Pattern Recognition: Apply advanced ML techniques (e.g., embedding-based clustering, representation learning, perturbation analysis) to systematically map error taxonomies and latent failure manifolds in model outputs.

Skills

Required

  • Python
  • PyTorch
  • JAX
  • Hugging Face
  • ML inference pipelines
  • model evaluation workflows
  • structured rating frameworks
  • LLMs
  • multimodal models
  • NLP systems
  • AI quality metrics
  • hallucination detection
  • model alignment
  • RLHF
  • DPO
  • LLM-as-a-judge frameworks
  • prompt engineering
  • RAG architectures
  • vector databases
  • semantic search
  • Fine-Tuning

Nice to have

  • Human factors
  • HCI
  • cognitive science methodologies
  • Ray
  • vLLM
  • MLflow
  • Weights & Biases

What the JD emphasized

  • 8+ years of relevant industry experience in ML Engineering or Applied Research.
  • Proven experience building scalable ML inference pipelines, model-evaluation workflows, and structured rating frameworks for large-scale AI systems.
  • Hands-on experience developing, fine-tuning, or evaluating LLMs, multimodal models, and NLP systems.
  • Deep familiarity with AI quality metrics, hallucination detection techniques (e.g., SelfCheckGPT), model alignment (RLHF/DPO), and LLM-as-a-judge frameworks (e.g., G-Eval, DeepEval).

Other signals

  • evaluation frameworks
  • model behavior analysis
  • human-centered AI
  • LLM evaluation
  • multimodal models