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Machine Learning Engineer Ads Relevance Quality

Apple Cupertino, CA, US

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Full-time Posted 25 days ago 3 min read

At Apple, we focus deeply on our customers’ experience. Apple Ads brings this same approach to advertising, helping people find exactly what they’re looking for and helping advertisers grow their businesses! Our technology powers ads and sponsorships across Apple Services, including the App Store, Apple News, and MLS Season Pass.

Everything we do is designed for trust, connection, and impact: We respect user privacy, integrate advertising thoughtfully into the experience, and deliver value for advertisers of all sizes-from small app developers to big, global brands. Because when advertising is done right, it benefits everyone!

Apple’s Ads team is seeking a highly skilled and motivated Machine Learning Engineer to join the Ads Relevance and Quality team. This team is responsible for ensuring high-quality, trustworthy ad experiences by building intelligent systems to evaluate ad relevance, detect low-quality or offensive content, and optimize user satisfaction.

You’ll work at the intersection of applied ML, NLP, and content quality-designing models and systems that understand queries, flag inappropriate content, and raise the bar for ad relevance and user trust across billions of queries and impressions.

**Description**

You’ll play a key role in shaping the future of safe, high-quality advertising at Apple. Your work will help ensure that ads remain useful, relevant, and respectful of our users-supporting Apple’s values of privacy, trust, and transparency. You’ll collaborate with world-class engineers and researchers, apply cutting-edge ML techniques in real-world systems, and have a direct impact on the experience of millions of users every day.

* Design and implement machine learning models to evaluate and improve ad relevance, trust, and quality for user queries

* Build NLP and multi-modal models that detect offensive, unsafe, or policy-violating content at scale

* Develop methods for semantic query understanding, ads understanding, relevance scoring, and keyword-to-ad matching

* Collaborate closely with product and policy teams to translate content integrity standards into measurable ML objectives

* Work with large-scale, privacy-preserving datasets to discover and operationalize new quality signals

* Conduct offline/online experiments to measure impact on user trust and satisfaction across Ads

* Partner cross-functionally with infrastructure, product, and moderation teams to deploy models at production scale

**Preferred Qualifications**

7+ years of experience applying machine learning at scale in domains such as ad tech, content moderation, search ranking, or recommendation systems

PhD in Computer Science, Machine Learning, NLP, or a related technical field

Additional experience in Scala or Java

**Minimum Qualifications**

4+ years of experience applying machine learning at scale in domains such as ad tech, content moderation, search ranking, or recommendation systems

Strong expertise in natural language processing, including offensive content detection, semantic matching

Experience with Transformer-based architectures (e.g., BERT, DistilBERT) and training pipelines in TensorFlow or PyTorch

Familiarity with fine-tuning Large Language Models (LLMs) for downstream tasks such as classification, content moderation, or semantic relevance

Familiarity with quality and fairness evaluation frameworks (precision, recall, coverage, policy alignment, etc.)

Hands-on experience with A/B testing, experimentation frameworks, and performance debugging in production

Proficiency in Python and SQL

Strong problem-solving and communication skills with a focus on translating abstract trust/safety goals into deployable solutions

MS in Computer Science, Machine Learning, NLP, or a related technical field

Apple is an equal opportunity employer that is committed to inclusion and diversity. We seek to promote equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics. Learn more about your EEO rights as an applicant .

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