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Senior Machine Learning Engineer

PayPal

$137,500 - $236,500
Dec 27, 2025
San Jose, CA, US
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PayPal is looking to design, build, and optimize large-scale, real-time personalization and recommendation systems that power key customer experiences across PayPal.

Requirements

  • Experience with ML frameworks like TensorFlow, PyTorch, or scikit-learn.
  • Familiarity with cloud platforms (AWS, Azure, GCP) and tools for data processing and model deployment.
  • Several years of experience in designing, implementing, and deploying machine learning models.
  • Strong software engineering background with proficiency in Python, Java, or Scala.
  • Hands-on experience with distributed systems and streaming technologies such as Kafka, Flink, Spark, or similar.
  • Solid understanding of ML model lifecycle, including training, deployment, monitoring, and continuous improvement.
  • Experience working with cloud-native architectures and modern CI/CD pipelines.

Responsibilities

  • Develop and optimize machine learning models for various applications.
  • Preprocess and analyze large datasets to extract meaningful insights.
  • Deploy ML solutions into production environments using appropriate tools and frameworks.
  • Collaborate with cross-functional teams to integrate ML models into products and services.
  • Monitor and evaluate the performance of deployed models.
  • Develop scalable ML pipelines and real-time inference services.
  • Implement robust data and feature workflows, and transform experimental models into reliable production solutions.

Other

  • 3+ years relevant experience and a Bachelor’s degree OR Any equivalent combination of education and experience.
  • 3 years of experience in machine learning engineering or applied ML development.
  • Experience building and scaling ML systems in production, particularly related to personalization, recommendations, ranking, or embeddings.
  • Ability to collaborate effectively in cross-functional teams and communicate clearly with technical stakeholders.
  • For the majority of employees, PayPal's balanced hybrid work model offers 3 days in the office for effective in-person collaboration and 2 days at your choice of either the PayPal office or your home workspace, ensuring that you equally have the benefits and conveniences of both locations.