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# Senior Machine Learning Engineer - Ads R&D

- **Company:** Spotify
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Data Analysis, Systems Engineering, Python (Programming Language), Machine Learning, Performance Tuning, Recommender Systems, Tensorflow, Software Engineering, Pytorch, Large Language Models, Apache Spark, Backend, Machine Learning Operations, Data Pipelines, Apache Beam, Programming Languages
- **Published:** November 8, 2026
- **Apply:** https://www.juju.com/job/28_25303_d47b7097946e93a8a093ba5ae7a923c4

## About the Role

* You have professional experience in applied machine learning.
 * You have strong technical expertise in software engineering, data analysis, and machine learning.
 * You are proficient in programming languages such as Python, Java, or Scala.
 * Experienced in Tensorflow or PyTorch and working with various aspects of the ML lifecycle.
 * You have expertise in developing data pipelines using tools like Apache Beam or Spark.
 * As a plus, you may have experience with any of the following - LLMs, Ray, Adtech, or Recommender Systems.

## Description

We are seeking a Senior Machine Learning Engineer to join the Supply Personalization squad. Supply Personalization focuses on optimizing the volume, timing, and types of ad loads a user receives. By leveraging data, machine learning, causal inference, and large scale online experimentation, we aim to uncover and learn the most effective strategies for enhancing user experiences and driving business outcomes.

We are looking for someone with strong expertise in data analysis, online experimentation techniques, and large-scale ML and engineering systems; someone who is motivated by user and business problems as much as they are by technical problems, and who thrives under ambiguity, experimentation, and iteration. You will work directly on an array of product features that drive the optimal user experience for our ads. You will collaborate with our cross-functional teams to ideate, develop, and own complex technical solutions on our ad services technology platforms. As someone who shares our passion for building innovative ad experiences, you'll have a direct impact on how the world uses Spotify.

What You'll Do

 * Design and implement machine learning systems for ad performance optimization.
 * Research and apply ML optimization strategies to balance multiple objectives effectively.
 * Analyze data and use machine learning techniques to understand user behavior and improve ad experiences.
 * Collaborate with backend engineers, data scientists, data engineers, and product managers to establish baselines, inform product decisions, and develop new technologies.