Senior Software Engineer

Mastercard•O'fallon, MO
•$115,000 - $184,000•Onsite

About The Position

The Business & Market Insights team within Mastercard's Services organization develops products and platforms that help customers understand consumer behavior, market trends, and business performance. Through data-driven insights, the team enables organizations to make informed decisions and drive growth. As a Senior Software Engineer, you will design, build, test, deploy, and support full-stack solutions that power these capabilities. Working across the frontend, backend, data, and cloud ecosystem, you will contribute to modern, reliable platforms while helping advance technical excellence and operational maturity.

Requirements

  • Bachelor's degree in Computer Science, Engineering, Information Technology, or a related field, or equivalent practical experience.
  • Agentic AI Development and Spec-Driven Development experience.
  • Experience building enterprise solutions using Java and Spring Boot.
  • Experience developing REST APIs, microservices, and distributed systems.
  • Working knowledge of React, JavaScript/TypeScript, HTML, and CSS.
  • Experience with cloud platforms, relational databases, and CI/CD pipelines.
  • Strong troubleshooting, debugging, and analytical skills.
  • Ability to deliver technical solutions independently while collaborating effectively within a team environment.

Nice To Haves

  • Experience with API management solutions such as Apigee, MuleSoft, Kong, or similar platforms.
  • Knowledge of AWS cloud services and cloud-native application design.
  • Familiarity with Kafka and event-driven architectures.
  • Experience with containerization, orchestration, and Infrastructure as Code tools, including Docker, Kubernetes, and Terraform.
  • Exposure to observability, monitoring, and performance management tools such as Splunk, Dynatrace, Grafana, or Prometheus.

Responsibilities

  • Design, develop, test, and support full-stack applications, APIs, and services.
  • Translate business and technical requirements into maintainable solutions.
  • Build REST APIs, microservices, and user-facing functionality.
  • Write high-quality code that aligns with Mastercard engineering standards.
  • Participate in application design and architectural discussions.
  • Contribute to cloud-based, resilient solution designs.
  • Support modernization efforts and technology enhancements.
  • Create and maintain automated unit, integration, and API tests.
  • Participate in code reviews to strengthen quality and maintainability.
  • Troubleshoot production issues, perform root cause analysis, and optimize performance.
  • Support observability, monitoring, CI/CD pipelines, and operational readiness.
  • Partner with Product, Architecture, UX, Security, and Engineering teams to deliver business value.
  • Participate in Agile ceremonies, technical planning, and knowledge-sharing activities.
  • Promote engineering standards and continuous improvement.

Benefits

  • insurance (including medical, prescription drug, dental, vision, disability, life insurance)
  • flexible spending account and health savings account
  • 16 weeks of new parent leave
  • up to 20 days of bereavement leave
  • 80 hours of Paid Sick and Safe Time
  • 25 days of vacation time
  • 5 personal days
  • 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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