Develop and optimize the platform and runtime powering Siri under strict latency, memory, and power constraints Advance agent capabilities through systematic, data-driven experimentation Drive the quality loop from early stage feature development through hillclimbing on data from the field Collaborate closely with Apple's app and frameworks teams to bring their experiences into Siri and use their requirements to shape the platform Navigate ambiguity and move fast in a rapidly evolving, frontier AI spaceBachelors degree in Computer Science, Machine Learning, or a related field, with 3+ years of industry experience Strong programming skills in languages like Swift, C++, Objective-C, or Python Hands-on experience shipping production systems built around LLMs Knowledge of agentic systems, including planning, orchestration, and multi-step tool use Ability to communicate and deliver in fast-moving, ambiguous environmentsExperience in prompt engineering, tool representation, or tool retrieval Experience designing evals and improving model quality with data Familiarity with App Intents or other Apple frameworks Strong API design skills and a track record of building platforms for other developers MS or PhD in Computer Science, Machine Learning, or a related field. You bring strong developer empathy and API design sensibility to partner closely with the teams behind Apple's world-class apps, using frameworks like App Intents and real-world developer requirements to drive the evolution of the platform.