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Mainframe jobs in o'fallon USA

2 mainframe jobs found in o'fallon: showing 1 - 2

Senior Software Engineer
Company: Mastercard |

Location: O'Fallon, MO, USA

| Salary: US$115000 - 184000 per year | Date posted: 14 Aug 2026
Qualifications Experience in cloud and microservices architecture or mainframe modernization Experience designing systems
Senior Software Engineer
Company: Mastercard |

Location: O'Fallon, MO, USA

| Salary: US$115000 - 184000 per year | Date posted: 17 Jul 2026
Preferred Qualifications Experience in cloud and microservices architecture or mainframe modernization Experience designing
1
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