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Senior Software Engineer
Mastercard
O'Fallon, MissouriPosted Sep 8, 2026 · 14h ago
Full-timeSeniorOn-siteFintech
About this role
Mastercard is seeking a Senior Software Engineer to join the Pricing & Billing Resource Center team in O'Fallon, Missouri. You will develop and operate business-critical, API-driven platforms using Java and Spring technologies to deliver scalable, secure, and reliable billing and pricing capabilities. This role involves designing automation frameworks, improving application correctness, performance, and reliability, and collaborating across teams to ensure robust software delivery.
What we are looking for
6- Design and develop reusable automation frameworks using Java and Spring Boot
- Build solutions to validate application behavior across API, UI, integration, and end-to-end workflows
- Develop automated solutions for API behavior, service interactions, and data integrity
- Design and execute automated performance, load, and resiliency assessments
- Integrate automated engineering controls into CI/CD pipelines
- Mentor engineers and lead improvements to automation frameworks and delivery processes
Skills mentioned
3JavaSQLCI/CD
