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Principal MTS, Machine Learning Engineer

PayPal is a global financial technology company that operates a two-sided network connecting merchants and consumers, enabling digital and mobile payments worldwide.
$120,300 - $287,100
Machine Learning
Principal Software Engineer
Hybrid
5,000+ Employees
8+ years of experience
AI · Finance

Description For Principal MTS, Machine Learning Engineer

PayPal, a global leader in financial technology, is seeking a Principal Machine Learning Engineer to spearhead the development of cutting-edge ML systems. This role presents an exciting opportunity to work at a company that has been revolutionizing commerce globally for more than 25 years, serving approximately 200 markets worldwide.

The position offers a competitive salary range of $120,300 to $287,100, along with comprehensive benefits including health coverage, equity options, and a flexible hybrid work model. As a Principal MTS, Machine Learning Engineer, you'll lead end-to-end ML initiatives, from research and prototyping to deployment and production monitoring, while collaborating with cross-functional teams to define long-term ML strategy.

The role requires 8+ years of experience in Machine Learning or related fields, with strong Python programming skills and deep expertise in ML libraries. You'll be responsible for architecting scalable ML infrastructure, implementing state-of-the-art algorithms, and driving best practices in data preprocessing and model training. Leadership skills are essential, as you'll mentor other engineers and communicate technical concepts to stakeholders at all levels.

PayPal offers an inclusive work environment where you'll be part of a team that's reshaping the future of financial services. The company's two-sided network connects millions of merchants and consumers, providing innovative solutions for digital payments and commerce. You'll work on challenging problems at scale, with access to large datasets and modern infrastructure, while contributing to products that impact hundreds of millions of users globally.

Benefits include comprehensive health and wellness programs, retirement resources, a unique sabbatical program, and extensive professional development opportunities. The company strongly values diversity and inclusion, maintaining a workplace where all employees can thrive and contribute to PayPal's mission of democratizing financial services.

This role is perfect for someone who combines technical excellence in machine learning with leadership capabilities and wants to make a significant impact in the fintech industry. You'll be working in a hybrid model from San Jose, California, with the flexibility to balance office collaboration and remote work.

Last updated a day ago

Responsibilities For Principal MTS, Machine Learning Engineer

  • Lead end-to-end ML initiatives from research and prototyping to deployment and monitoring in production
  • Collaborate with Product, Data, and Engineering teams to identify opportunities for ML-driven solutions
  • Architect scalable and robust ML infrastructure and pipelines
  • Evaluate and implement state-of-the-art algorithms in areas such as NLP, computer vision, recommendation systems, or time series forecasting
  • Drive best practices in data preprocessing, feature engineering, model training, and experimentation
  • Mentor and guide other ML engineers and data scientists
  • Establish technical standards, conduct code and design reviews
  • Communicate technical concepts and ML insights to stakeholders at all levels

Requirements For Principal MTS, Machine Learning Engineer

Python
  • 8+ years of experience in Machine Learning, Data Science, or related fields
  • Strong programming skills in Python and deep experience with ML libraries
  • Proven track record of building and deploying ML models in production environments
  • Expertise in model evaluation, A/B testing, and performance optimization
  • Experience with cloud platforms (AWS, GCP, Azure) and ML Ops tools
  • Deep understanding of statistical modeling, optimization, and algorithm design
  • Excellent communication and leadership skills
  • PhD or Master's degree in Computer Science, Machine Learning, or related technical field (preferred)
  • Experience with large-scale distributed systems and big data frameworks (preferred)
  • Knowledge of responsible AI and model interpretability techniques (preferred)

Benefits For Principal MTS, Machine Learning Engineer

Medical Insurance
Dental Insurance
Vision Insurance
Mental Health Assistance
401k
Equity
  • Comprehensive Health and Wellness programs
  • Retirement and investment resources
  • Paid Time Off and 4-week sabbatical program
  • Career and Leadership Training and Development
  • Educational benefits
  • Company-matched giving
  • Volunteering opportunities
  • Flexible hybrid work model (3 days office, 2 days flexible)
  • Employee shares options
  • Health and life insurance

Interested in this job?

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