Senior Software Engineer

Mastercard

O Fallon, Missouri, United States of America Posted October 27, 2026

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On-site Full-time Senior
Job Description

Take on the role of Senior Software Engineer to design, develop, and maintain scalable software solutions supporting global real-time payment networks. Collaborate with cross-functional teams to ensure secure, reliable, and resilient systems. Ideal for experienced engineers with strong software engineering and testing expertise.

Required Skills
software development collaboration cross-functional collaboration testing
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