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Software Engineer I
Mastercard
O'Fallon, MissouriPosted Oct 7, 2026 · 3h ago$72K – $115K
Full-time$72K – $115KEntry levelFintech
About this role
Join Mastercard's Transaction Stream team in O'Fallon, Missouri, to build and enhance applications and services for our global real-time payment network. You will collaborate with engineers and product partners to develop, test, and maintain software that ensures speed, reliability, and resilience in transaction processing worldwide.
What we are looking for
6- Develop, test, and maintain software applications and services
- Write clean, maintainable, and secure code
- Participate in software design and architecture
- Contribute to APIs, microservices, and event-driven solutions
- Apply secure coding practices and cloud-based application support
- Collaborate with cross-functional teams to deliver software solutions
Skills mentioned
6JavaJavaScriptGoSQLAngularCI/CD
