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Job Information

MasterCard Senior Software Development Engineer (Payment Gateway)-2 in O'Fallon, Missouri

Our Purpose

We work to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart and accessible. Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial institutions, governments and businesses realize their greatest potential. Our decency quotient, or DQ, drives our culture and everything we do inside and outside of our company. We cultivate a culture of inclusion ( for all employees that respects their individual strengths, views, and experiences. We believe that our differences enable us to be a better team – one that makes better decisions, drives innovation and delivers better business results.

Job Title

Senior Software Development Engineer (Payment Gateway)-2


The Simplify Commerce team is looking for a Software-Development-Engineering to drive our customer experience strategy forward by consistently innovating and problem-solving. The ideal candidate is passionate about the customer experience journey, highly motivated, intellectually curious, analytical, and possesses an entrepreneurial mindset. Responsible for the analysis, design, development, and delivery of software solutions. Defines requirements for new applications and customizations, adhering to standards, processes, and best practices


• Develop medium-sized project/initiatives as an individual contributor with advanced knowledge within discipline, leading a segment of several initiatives or a larger initiative, or may formally supervise a small team, and assigns day-to-day work

• Designs and develops applications, system to system interfaces and complete software solutions, and creates documentation such as user guides and software development guides

• Support and provide technical guidance to team members

• Significant advanced code development, code review and day-to-day support duties

• Department-wide public speaking and other communications conveying application-level directions

All About You

• Software development, design & architecture experience of medium to complex applications

• Good knowledge of Data Structures & Algorithms, Architecture Principles, Design Patterns.

• Experience of building services on cloud platform such as PCF.

• Experience in Java/J2EE technologies with Spring Boot framework, REST APIs, JSON, front end technologies (CSS, HTML, Angular 6.0+), Web & Application Server

• Database [Postgres, Redis, MySQL]

• Hands on experience of writing Junit/Spock test cases.

• Micro services architecture working experience is added advantage

• Experience with AngularJS, Groovy, Grails is added advantage.

• Exposure to Jasmine, Karma is added advantage

• Application Security including information security principles and realization, web app security and PCI DSS Compliance

• Experience in implementing CI/CD build pipelines with tools like Git/Bitbucket, Jenkins, Maven, Artifactory

• Experience with software development frameworks such as Scrum, SAFe Agile

• Strong inter-personal skills and ability to work in a collaborative environment with cross-functional teams and business

COVID-19 Considerations

We value the safety of each member of our community because we know we’re all in this together. In many locations, which may change over time, we’ve implemented a virtual hiring process and continue to interview candidates by video or phone. In addition, in some locations, only individuals who have been fully vaccinated will be permitted inside Mastercard offices until further notice.

In the US, Mastercard is a government contractor, which may legally require most Mastercard employees to be vaccinated unless a verified approved medical or religious exemption is granted. Further, we are currently making every effort towards having employees return to work in the office 2 days per week, if that makes sense for their team. Everyone must be vaccinated to enter Mastercard offices at this time. Therefore, we expect all candidates to be vaccinated or to be approved for a medical or religious accommodation prior to commencing work at Mastercard.

In the US, Mastercard is an inclusive Equal Employment 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. If you require accommodations or assistance to complete the online application process, please contact 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.

Requisition ID: R-162306