← All roles

Staff Applied Scientist, UI Control Models

Apple· Machine Learning and AI
Apply on company site
Cupertino, CA$216.2k - $324.8kfull-timePosted 2mo ago

About the role

Staff Applied Scientist role on the Siri team focused on building and shipping powerful, private, low-latency UI control LLMs that run within mobile hardware. Lead design, development, and delivery of large language models powering core Siri functionality, with emphasis on post-training techniques, model efficiency, and end-to-end lifecycle.

Responsibilities

  • Drive design, development and delivery of large language models that power the core of Siri.
  • Lead research and engineering efforts in model post-training techniques that create UI control, tool calling and conversational models for mobile hardware constraints.
  • Collaborate with researchers, software engineers and product teams to move innovations from prototype to production.
  • Identify and apply post-training techniques, advance model efficiency and contribute to end-to-end model lifecycle processes.
  • Set technical directions for the team; lead with hands-on innovation and impact.

Qualifications

  • Masters or PhD in Computer Science, Machine Learning Engineering or equivalent professional experience
  • 7+ years of hands-on industry experience and a proven track record of shipping ML-powered products or features, ideally involving LLMs
  • Extensive experience with the ML development loop, with expertise in model architectures, data curation, training policies and evaluation.
  • Deep expertise in LLM/VLM post-training methods, including supervised fine-tuning, and reinforcement learning.
  • Proficiency in Python and one of the deep learning frameworks (PyTorch, JAX, or TensorFlow).
  • Excellent communication: strong interpersonal, verbal and written skills.
  • Experience developing AI agents capable of complex reasoning, planning, tool use and UI control in diverse environments.
  • Experience developing small LLMs for constrained or edge devices.
  • Experience as a tech lead, leading teams of size 5-10.
  • Experience building thoughtful benchmarks and environments to evaluate UI control agents.
  • Deep understanding of model efficiency and deployment trade-offs in production environments.
  • Experience with multi-modal foundation models.
  • Experience developing ML systems for natural language understanding or digital assistants.

Skills

Required:Large language models (LLMs)UI control agentsPythonDeep learning frameworksLeadership / tech lead
Nice to have:Edge/constrained devices ML

Benefits

  • Comprehensive medical and dental coverage
  • retirement benefits
  • discounted products and free services
  • reimbursement for certain educational expenses including tuition
  • discretionary bonuses or commission payments (possible)
  • relocation assistance
  • participation in Apple stock programs (RSU, Employee Stock Purchase Plan)
Last updated Oct 23, 2026. Interested? Apply on the company site.

About Apple

Discover the innovative world of Apple and shop everything iPhone, iPad, Apple Watch, Mac, and Apple TV, plus explore accessories, entertainment, and expert device support.

Discover the innovative world of Apple and shop everything iPhone, iPad, Apple Watch, Mac, and Apple TV, plus explore accessories, entertainment, and expert device support.

AirPods Max 2Apple ArcadeApple CardApple Fitness+Apple MusicApple TVApple TV+Apple Watch Series 11
Company profileWebsite

More open roles at Apple