Apple

AIML - Senior Machine Learning Research Engineer, LLM Post-training (Multilinguality)

Apple$150K — $180K *
Information Technology
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • 2+ years of experience in machine learning, NLP, or related fields
  • Hands-on experience training and evaluating neural models
  • Proficient programming skills in Python and a major deep learning framework (e.g., PyTorch, TensorFlow, JAX)
  • Bachelor's or Master's degree in Computer Science, Machine Learning, Computational Linguistics, or equivalent experience
  • Experience with multilingual, multi-script, or cross-lingual datasets

Responsibilities

  • Develop models for accurate language detection across diverse scripts and user contexts
  • Collaborate with researchers, engineers, and linguists to ensure system reliability
  • Explore novel modeling approaches and data strategies
  • Manage the complete model lifecycle from data curation to deployment
  • Contribute to building high-quality inclusive language technology

Benefits

  • Collaborative work environment with world-class experts
  • Opportunity to influence multilingual features used by millions
  • Focus on developing technology that promotes linguistic diversity
  • Access to cutting-edge research and methodologies
  • Possibility to work on innovative projects in Natural Language Processing
Full Job Description
The Multilingual Intelligence team is looking for a machine learning engineer to build the next generation of text language identification systems. You will develop models that accurately detect and classify languages across diverse scripts, regions, and user contexts - forming the backbone of multilingual features used by millions of people worldwide. You will work alongside a team of world-class experts to explore novel modeling approaches, data strategies, and evaluation methodologies that push the boundaries of what's possible in language detection at scale.

Passionate about Natural Language Processing, multilingual systems, and building ML that works for everyone regardless of the language they speak? Join us to make every device fluent in every language.

Description

Text language identification is a foundational capability that powers multilingual experiences across products - from translation and search to content recommendation and accessibility. As the number of supported languages grows and user expectations rise, the challenge is building models that are not only accurate but also fair, robust, and efficient across the full spectrum of the world's languages.

We are looking for a machine learning engineer passionate about building high-quality, inclusive language technology. As a member of the team, you will work across the full model lifecycle - from data curation and model design to evaluation and deployment. You will collaborate with researchers, engineers, and linguists to ensure our language identification systems perform reliably for users everywhere, regardless of how they write or what language they use.

The successful candidate should be a strong team player with excellent oral and written communication skills and a genuine passion for building ML systems that work for the world's linguistic diversity.

Minimum Qualifications

2+ year experience in machine learning, NLP, or related fields, with hands-on experience training and evaluating neural models.

Proficient programming skills in Python and at least one major deep learning framework such as PyTorch, TensorFlow, or JAX.

Bachelor's or Master's degree, or equivalent practical experience, in Computer Science, Machine Learning, Computational Linguistics, or a related technical field.

Experience working with multilingual, multi-script, or cross-lingual datasets.

Preferred Qualifications

Experience with text classification, language identification, dialect identification, or similar NLP tasks involving multiple languages.

Familiarity with embedding models, sentence representations, or contrastive learning methods.

Understanding of model optimization techniques such as quantization, pruning, or knowledge distillation, and a general interest in efficient inference.

Experience with low-resource languages, code-switching, or mixed-language input handling.

Familiarity with Hugging Face ecosystem (transformers, tokenizers, datasets) and modern NLP pipelines.

Ability to formulate a problem, design experiments, and implement end-to-end solutions in Python and Bash.

Strong communication skills and a passion for working cross-functionally across Research, Engineering, and Product teams.

About Apple

Apple is a corporation that designs, manufactures, and markets mobile communication and media devices, personal computers, portable digital music players, and sells a variety of related software, services, peripherals, networking solutions, and third-party digital content and applications. Apple provides many products and services, including iPhone; iPad; iPod; Mac; Apple TV; a portfolio of consumer and professional software applications; the iOS and OS X operating systems; iCloud; and accessories, service, and support offerings. It sells its products worldwide through its retail stores, online stores, direct sales force and third-party cellular network carriers, wholesalers, retailers, and value-added resellers to the consumer and also sells third-party iPhone, iPad, Mac and iPod compatible products, including application software and accessories through its online and retail stores. Introduced in 1984, the Macintosh was the first widely sold personal computer with a graphical user interface (GUI). That feature and others such as an improved floppy drive design and a low-cost hard drive that made data retrieval faster helped Apple cultivate a reputation for innovation. Apple was named as the most admired company in the United States in 2008 and in the world from 2008 to 2012 by the Fortune magazine. The company was founded by Steven Paul Jobs, Steve Wozniak, and Ronald Gerald Wayne on April 1, 1976, and is headquartered in Cupertino, California.

Apple Careers

Join Apple, a place where extraordinary people gather to do their best work. Our ever-expanding global team is at the forefront of innovation and leadership in the tech industry. At Apple, we're not just building products—we're crafting the kind of wonder that revolutionizes entire industries. It's the diversity of our people and their ideas that inspires the innovation that runs through everything we do, from amazing technology to industry-leading environmental efforts. Work You’ll Do Embark on a journey with Apple’s market-leading team to help some of the world’s most influential companies navigate their path to digital mastery with cutting-edge technology and services. Transform industries and touch lives with your unique ideas at Apple. Here, you’ll lead through a unique position at the intersection of technology, creativity, and robust industry expertise. Collaborate with a global team of professionals who are at the top of their game in technology and design. Apple isn’t just a company, it’s a community of innovators and passionate thinkers. Introducing the Apple Innovation and Leadership Initiative We are building a market-leading team to drive our efforts in delivering groundbreaking solutions and services. At Apple, job opportunities are abundant, offering you the chance to explore diverse roles from engineering to marketing, all designed to empower your career growth. Do Innovative Work Join the largest group of creative and technical experts in the world—professionals dedicated to redefining what’s possible through technology and innovation. Deliver targeted solutions through a depth and breadth of expertise that’s unmatched, driving forward our commitment to excellence and leadership in every project we undertake. Be Part of a Great Team Engage in a wide range of projects utilizing Apple’s technology and resources. Harness the unparalleled capabilities, global scale, and joint solution development that only Apple can offer. Future-Proof Your Career Advance your career with limitless opportunities at Apple. Go as far as your ambition takes you with unmatched training, development, and certification support. Explore Discover how Apple is leading the way in tech innovation: [With iOS] Businesses can streamline operations and enhance customer interactions... READ MORE Smart home technology integration that sets the standard for convenience and security... READ MORE The Apple Experience Our combined service capabilities, global scale, and joint solution development help clients overcome challenges and lead transformation in their industries. Clients worldwide look to Apple for new strategies and solutions that drive growth and innovation in the digital era. Stay Connected Join Our Team Search open positions that match your skills and interests. We look for passionate, curious, creative, and solution-driven team players. Whether you’re seeking a professional role, an internship, or a leadership position, Apple offers a variety of employment opportunities. SEARCH APPLE JOBS Keep Up to Date Stay ahead with career tips, insider perspectives, and industry-leading insights you can put to use today—all from the people who work here. READ CAREERS BLOG Job Alert Emails Personalize your subscription to receive job alerts, latest news, and insider tips tailored to your preferences. See what exciting and rewarding opportunities await at Apple, a company committed to diversity, innovation, and leadership. Explore job opportunities, employment benefits, and the culture of growth and innovation at Apple. Prepare your resume, hone your interview skills, and ready yourself for a career at one of the most prestigious companies in the world. Join us in pushing the boundaries of what is possible.
Learn more about Apple
Size
154,000 employees
Market Cap
$2,074.3 billion
Industry
Net Income
$63.9 billion
Founded
1976
5 Year Trend
+11.5%
Revenue
$294.1 billion
NASDAQ

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