Senior Software Engineer

Mastercard-posted 2 months ago
$115,000 - $184,000/Yr
Full-time • Senior
O'fallon, MO
5,001-10,000 employees
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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. Mastercard is a global technology company behind the world’s fastest payments processing network. Mastercard's Commercial Solutions provides capabilities such as expense management, reporting, virtual cards, and acceptance to our issuers, driving visibility and actionable insights. We are seeking a Senior Software Engineer to join our Commercial Platform Engineering organization in our O'Fallon, Missouri location. This is a hybrid position requiring three days on-site per week.

  • Design, develop, test, and deploy high-quality backend software solutions.
  • Build and maintain RESTful APIs and microservices using Java and Spring Boot.
  • Optimize database queries and schemas for performance and scalability.
  • Apply best practices in automated testing, CI/CD, and monitoring.
  • Mentor junior engineers through technical guidance and code reviews.
  • Collaborate with cross-functional teams including Architects, Product Owners, and Designers.
  • Ensure adherence to Mastercard Engineering Principles and security standards.
  • Contribute to the Software Engineering Guild by sharing knowledge and best practices.
  • Strong knowledge of Java technologies (Core Java, Spring Integration, Spring Boot, Hibernate, REST/SOAP web services).
  • Strong Oracle Database and SQL skills.
  • Hands-on experience with development tools such as Bitbucket, Jenkins, and the Atlassian suite.
  • Experience in designing solutions for simplicity, scalability, and future agility.
  • Experience in Test-Driven Development (TDD)/Behavior-Driven Development (BDD).
  • Strong knowledge of automated build and deployment, continuous integration, and CI/CD Pipelines.
  • Familiar with secure coding standards such as OWASP, CWE, and SEI CERT.
  • Comfortable working in Agile/Scrum environments, including backlog grooming, sprint planning, and capacity measurement.
  • Strong communication and collaboration skills, with the ability to mentor and guide team members.
  • Capable of translating user stories into scalable, maintainable backend solutions.
  • Detail-oriented, proactive, and able to work independently in fast-paced environments.
  • Experience with Junit, Mockito, and Spring Test.
  • Bachelor’s degree in Computer Science, Engineering, Information Systems, or a related field, or equivalent work experience.
  • 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
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