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Senior, Software Engineer
Mastercard
O'Fallon, MissouriPosted Oct 21, 2026 · 6h ago$115K – $184K
Full-time$115K – $184KSenior levelFintech
About this role
As a Senior Software Engineer at Mastercard, you will design, develop, and deploy complex backend applications and services, primarily using Java. You will play a key role in building intelligent decision management capabilities that power global payment systems, ensuring security, scalability, and reliability. This role offers the opportunity to influence technical direction, improve engineering practices, and mentor other engineers.
What we are looking for
6- Design, develop, and deploy Java-based backend applications and services
- Build scalable, secure, and reliable software for global payment decisioning
- Develop and maintain automated testing and CI/CD pipelines
- Troubleshoot and refactor existing code for improved performance and maintainability
- Apply secure coding practices and mentor junior engineers
- Contribute to full software development lifecycle and agile processes
Skills mentioned
2JavaCI/CD
