Apple

Sr. Machine Learning Engineer, Speech LLM Evaluation

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

Qualifications

  • Bachelor's degree in Computer Science, Electrical Engineering, or related field, or equivalent experience.
  • Experience with text, speech, or audio evaluation pipelines and metrics.
  • Proficient in Python and capable of building scalable data processing pipelines.
  • Experience in curating or annotating datasets for ML evaluation or training.
  • Knowledge of statistics for measuring model performance and interpreting evaluation results.
  • Familiarity with LLM evaluation techniques both automated and human-based.
  • Strong communication skills for explaining evaluation results to diverse audiences.

Responsibilities

  • Own the data and metrics foundation for evaluating speech LLMs.
  • Build and curate evaluation datasets that represent real-world usage.
  • Design metrics and automated judges to analyze model outputs.
  • Collaborate with modeling, infrastructure, and product teams for model evaluation.
  • Ensure models are evaluated efficiently and consistently before release.

Benefits

  • Opportunity to work at the forefront of AI and human-centered design.
  • Collaborative environment with cross-functional teams.
  • Focus on practical, real-world applications of speech technology.
  • Potential for impactful contributions to high-visibility projects.
Full Job Description
This is a rare opportunity to build at the intersection of cutting-edge AI and human-centered design, shipping technology that is centered around users and their needs.

Description

This role owns the data and metrics foundation for evaluating speech LLMs (e.g., real-time speech understanding and generation models) across accuracy, robustness, and conversational quality. You'll build and curate evaluation datasets that reflect real usage - from personalized named-entity queries to multi-turn fluid conversations - and design the metrics and automated judges that turn model outputs into actionable, trustworthy signal. You'll work closely with modeling, infrastructure, and product partners to make sure every new model is evaluated quickly, consistently, and at the right level of rigor before it reaches customers.

Minimum Qualifications

Bachelor's degree in Computer Science, Electrical Engineering, or a related field, or equivalent practical experience.

Experience building or working with text, speech or audio evaluation pipelines and metrics.

Proficiency in Python and experience building data processing pipelines at scale.

Experience curating or annotating datasets for machine learning evaluation or training.

Working knowledge of statistics as applied to measuring model performance and interpreting evaluation results.

Familiarity with large language model evaluation techniques, including automated (LLM-as-judge) and human evaluation methods.

Strong written and verbal communication skills, with the ability to explain evaluation results to both technical and non-technical audiences.

Preferred Qualifications

Experience evaluating audio-native or multimodal (speech-in, speech-out) large language models.

Experience designing or running human evaluation studies (e.g., side-by-side comparisons, MOS ratings) at scale.

Familiarity with personalization and named-entity evaluation challenges in speech systems.

Experience with multilingual or international audio dataset development.

Experience with distributed data processing frameworks (e.g., Spark) for large-scale audio dataset generation.

Publication record or demonstrated contributions in speech, audio ML, or NLP evaluation.

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
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