Lead Multilingual LLM Post-Training Research Engineer

Apple Inc.; New York; On-site; USD 185,000 - 325,000; Full time

Job summary

Apple Inc. seeks a Senior AIML Research Engineer for LLM post-training to advance multilingual capabilities across the Apple ecosystem. You will tackle instruction following, tool use, deep reasoning, and architectural adaptation, building private, privacy-forward models with cross-functional collaboration.

Join a world-class team shaping multilingual AI at Apple. Responsibilities include defining research directions, evaluating multilingual performance, and deploying scalable post-training

Qualifications

• 4+ years of ML/NLP experience with a focus on LLMs, post-training, or reinforcement learning.
• Proficient programming in Python and a major deep learning framework such as JAX or PyTorch.
• Masters/PhD, or equivalent practical experience in Computer Science, ML, or related field.

Responsibilities

• Interface with product teams to translate requirements into model capabilities.
• Drive data strategy for high-quality data generation and filtering for multilingual tasks.
• Design robust evaluation methodologies for model helpfulness and factuality.
• Design and iterate post-training strategies to unlock model capabilities.

Skills

ML/NLP experience

Research experience

Education

Masters/PhD in CS/ML or related

Tools

Python

JAX

PyTorch

Bash

Java/C/C++

Job description

Apple Inc. seeks a Senior AIML Research Engineer for LLM post-training to advance multilingual capabilities across the Apple ecosystem. You will tackle instruction following, tool use, deep reasoning, and architectural adaptation, building private, privacy-forward models with cross-functional collaboration.

Join a world-class team shaping multilingual AI at Apple. Responsibilities include defining research directions, evaluating multilingual performance, and deploying scalable post-training