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Senior SoftwareEngineer

Job in O'Fallon, St. Charles County, Missouri, 63366, USA
Listing for: Mastercard
Full Time, Part Time position
Listed on 2026-02-08
Job specializations:
  • Software Development
    Software Engineer
Salary/Wage Range or Industry Benchmark: 115000 - 184000 USD Yearly USD 115000.00 184000.00 YEAR
Job Description & How to Apply Below

Overview

Senior Software Engineer at Mastercard with a focus on Quality Engineering. Master Card powers economies and empowers people globally, delivering secure, simple, smart and accessible digital payments. The team aims to build an ecosystem to improve delivery time-to-market, quality excellence, and customer satisfaction across verticals including core, emerging payments, and value-added services.

Responsibilities
  • Play a crucial part in helping drive Quality to help build and ship better products.
  • Collaborate with development teams to enhance existing software development processes.
  • Drive QE methodologies and help build high quality software.
  • Partner with developers to improve and automate test and release processes.
  • Help make Quality an integral part of the development process.
All About You / Qualifications
  • Exposure to agile and waterfall testing methodologies and tools such as RALLY and ALM.
  • Knowledge in COBOL, CICS, VSAM, DB2, DB2 Stored Procedures, DB2 Utilities, and SQL.
  • Knowledge in Java/C/C++ development.
  • Knowledge in Digital Native Architecture.
  • Exposure with a mainframe Source Control tool, and with a graphical application using the mainframe as its data repository, and creating Cobol Stored Procedures preferred.
  • Experience of working with other developers to ensure that systems are designed for reliability, performance and testability.
  • Experience testing across a variety of platforms: web and mobile user interface, APIs (REST and SOAP), and Mainframe and UNIX.
  • Exposure in building and using automation frameworks using technologies:
    Java, JUnit, Selenium, JBehave, Soap UI/Pro, REST, JSON and XML.
  • Knowledge of payment simulation tools (Paragon, Fin Sim, T3 or similar).
  • Knowledge of ISO payment protocols (8583) desirable.
Corporate Security Responsibility
  • Abide by Mastercard's security policies and practices.
  • Ensure the confidentiality and integrity of the information being accessed.
  • Report any suspected information security violation or breach.
  • Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.
Compensation and Benefits

In line with Mastercard's total compensation philosophy and assuming the job will be performed in the US, the successful candidate will be offered a competitive base salary and may be eligible for an annual bonus or commissions depending on the role. The base salary offered may vary based on location, job-related knowledge, skills, and experience. Mastercard benefits for full-time (and certain part-time) employees generally include: health insurance, flexible spending accounts and health savings accounts;

paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave); 80 hours of Paid Sick and Safe Time; 25 days of vacation time and 5 personal days, pro-rated based on date of hire; 10 annual paid U.S. observed holidays; 401k with company match; deferred compensation for eligible roles; fitness reimbursement or on-site facilities;

tuition reimbursement; and more. Mastercard interns benefits include: 56 hours of Paid Sick and Safe Time; jury duty leave; and on-site fitness facilities in some locations.

Pay Ranges

O Fallon, Missouri: $115,000 - $184,000 USD

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Position Requirements
10+ Years work experience
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