• Senior Software/ QA Engineer

    Mastercard (O'Fallon, MO)


    Our Purpose

     

    _Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential._

     

    Title and Summary

     

    Senior Software/ QA Engineer

     

    Overview

     

    Mastercard is looking for a Senior Software/QA Engineer to join our dynamic team working in the Payments and Disputes domain. You’ll help build and test scalable, secure, and high-performing systems that support merchants, issuers, and digital partners. Our platform leverages modern technologies like Java, Snowflake, Microservices, CI/CD pipelines, and cloud-based tools to deliver real-time insights and solutions.

     

    If you're passionate about automation, quality, and innovation—and want to work on impactful projects that shape the future of digital payments—this role is for you.

     

    What You’ll Do

     

    - Design and test scalable, reliable, and secure systems in a cloud environment.

     

    - Collaborate with developers, product managers, and stakeholders to understand business needs.

     

    - Build and maintain automated test frameworks for REST APIs, integration, performance, functional, and smoke testing.

     

    - Use tools like JUnit, Selenium, Postman, Cucumber, TestNG, and CI/CD pipelines to ensure high-quality software delivery.

     

    - Analyze and improve system performance, reliability, and test coverage.

     

    - Support production systems and help resolve issues quickly and effectively.

     

    - Promote a culture of quality and automation across the team.

     

    What You’ll Bring

     

    - 6+ years of experience in software development and QA, with a strong focus on automation.

     

    - Solid programming skills in Java and experience with Spring Boot.

     

    - Experience testing microservices, APIs, and data pipelines.

     

    - Familiarity with Snowflake, SQL/NoSQL databases, and data analytics concepts.

     

    - Hands-on experience with CI/CD tools (e.g., Jenkins, GitHub Actions) and cloud platforms (Azure preferred).

     

    - Strong understanding of testing frameworks and tools like JUnit, Selenium, Postman, Cucumber, TestNG, and performance testing tools.

     

    - A mindset focused on automation, continuous improvement, and collaboration.

     

    - Excellent communication skills and the ability to work with global teams across time zones.

     

    Nice to Have

     

    - Experience with Chef, Splunk, Dynatrace, Shared services, SDLC process with agile mindset and similar monitoring and infrastructure tools.

     

    - Knowledge of ETL processes, data modeling, or pattern analysis.

     

    - Exposure to UI testing (Angular or similar frameworks).

     

    Why Join Us?

     

    - Work on cutting-edge technology in a fast-growing, global company.

     

    - Be part of a team that values innovation, collaboration, and continuous learning.

     

    - Help shape the future of secure, smart, and simple digital payments.

     

    Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact [email protected] and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.

     

    Corporate Security Responsibility

    All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

    + 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, and

    + Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.

     

    In line with Mastercard’s total compensation philosophy and assuming that the job will be performed in the US, the successful candidate will be offered a competitive base salary based on location, experience and other qualifications for the role and may be eligible for an annual bonus or commissions depending on the role. Mastercard benefits for full time (and certain part time) employees generally include: insurance (including medical, prescription drug, dental, vision, disability, life insurance), flexible spending account and health savings account, paid leaves (including 16 weeks new parent leave, up to 20 paid days bereavement leave), 10 annual paid sick days, 10 or more annual paid vacation days based on level, 5 personal days, 10 annual paid U.S. observed holidays, 401k with a best-in-class company match, deferred compensation for eligible roles, fitness reimbursement or on-site fitness facilities, eligibility for tuition reimbursement, gender-inclusive benefits and many more.

     

    Pay Ranges

     

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