Senior Machine Learning Engineer Jobs in St Louis, MO

Our Purpose
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.
Title and Summary
Senior Data Engineer
About the Role
As a Senior Data Engineer, you'll take ownership of building and optimizing data platforms, pipelines, and systems that enable advanced analytics, machine learning, and business insights. You'll collaborate closely with engineering, product, and analytics teams to deliver reliable, production-ready data solutions.
Role
• Design, build, and maintain scalable data platforms leveraging Data Engineering best practices
• Develop and optimize large-scale data pipelines using Distributed Data Processing frameworks
• Implement and manage automated workflows using Workflow Orchestration to ensure reliable data movement and processing
• Design and integrate data from multiple sources using Data Integration techniques to create a unified, accessible data layer
• Build and maintain scalable Data Lakes for storing and analyzing large, diverse datasets
• Define and implement robust Data Modeling strategies to support analytics and reporting use cases
• Design and optimize Database Design solutions to ensure performance, scalability, and data integrity
• Process and transform large datasets using efficient Data Processing techniques to generate actionable insights
• Ensure strong Data Security practices, including data protection, governance, and compliance
• Lead system design discussions and contribute to architectural decisions
• Own full SDLC delivery including requirements, design, development, testing, and deployment
• Troubleshoot and resolve production issues through structured root cause analysis
• Drive improvements in performance, scalability, and reliability of data systems
• Collaborate across teams to align data solutions with business needs
• Mentor team members and contribute to knowledge sharing and technical development
All About You
• Experience designing and building scalable systems using modern Data Engineering principles
• Strong experience with Distributed Data Processing and large-scale data platforms
• Hands-on experience with Data Integration, Data Modeling, and Data Processing
• Experience building and maintaining Data Lakes and modern data architectures
• Solid understanding of Database Design and data optimization techniques
• Knowledge of Workflow Orchestration tools and end-to-end pipeline automation
• Strong understanding of Data Security and data governance practices
• Proven ability to work independently on complex technical challenges
• Strong troubleshooting and root cause analysis skills in data environments
• Experience working in Agile/Scrum environments and collaborating across teams
• Strong communication and collaboration skills, with the ability to influence decisions
• Experience mentoring or supporting other engineers
• Bachelor's degree or equivalent experience
Nice to Have
• Experience with cloud platforms (AWS, Azure, or GCP) and modern data tooling
• Experience with event-driven or streaming architectures
• Exposure to machine learning or advanced analytics environments
• Experience in high-throughput or regulated environments (payments, banking, fintech)
Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact reasonable_accommodation@mastercard.com and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.
Corporate Security Responsibility
All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

• Abide by Mastercard's security policies and practices;
• Ensure the confidentiality and integrity of the information being accessed;
• Report any suspected information security violation or breach, and
• Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.

In line with Mastercard's total compensation philosophy and assuming that the job will be performed in the US, the successful candidate will be offered a competitive base salary and may be eligible for an annual bonus or commissions depending on the role. The base salary offered may vary depending on multiple factors, including but not limited to location, job-related knowledge, skills, and experience. Mastercard benefits for full time (and certain part time) employees generally include: insurance (including medical, prescription drug, dental, vision, disability, life insurance); flexible spending account and health savings account; paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave); 80 hours of Paid Sick and Safe Time, 25 days of vacation time and 5 personal days, pro-rated based on date of hire; 10 annual paid U.S. observed holidays; 401k with a best-in-class company match; deferred compensation for eligible roles; fitness reimbursement or on-site fitness facilities; eligibility for tuition reimbursement; and many more. Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty leave; and on-site fitness facilities in some locations.
Pay Ranges
O'Fallon, Missouri: $115,000 - $184,000 USD