# Senior Machine Learning Engineer - Ads R&D

**Company:** [Spotify](https://hotfix.jobs/companies/spotify)
**Location:** Remote
**Role:** ML Engineering
**Experience:** 5+ years
**Skills:** Machine Learning, Python, Java, Scala, TensorFlow, PyTorch, Apache Beam, Spark, Data Analysis, Data Pipelines, LLMs, Ray, Recommender Systems
**Posted:** 2025-08-26

> Senior ML Engineer on Spotify's Supply Personalization squad, designing and implementing ML systems to optimize ad loads, user behavior analysis, and ad experiences using causal inference and large-scale experimentation. Requires strong applied ML, software engineering, data analysis expertise, and proficiency in Python/Java/Scala, TensorFlow/PyTorch, and data pipelines.

## Job Description

## 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.

## Who You Are
- Professional experience in applied machine learning.
- Strong technical expertise in software engineering, data analysis, and machine learning.
- Proficient in programming languages such as Python, Java, or Scala.
- Experienced in Tensorflow or PyTorch and working with various aspects of the ML lifecycle.
- Expertise in developing data pipelines using tools like Apache Beam or Spark.
- Plus: experience with LLMs, Ray, Adtech, or Recommender Systems.

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**Apply:** https://hotfix.jobs/jobs/343cdfa3-c2fd-4aff-aaee-2093d02c1ddf
**Canonical:** https://hotfix.jobs/jobs/343cdfa3-c2fd-4aff-aaee-2093d02c1ddf