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Sr. Software Engineer

O'Fallon, Missouri MasterCard

Who is Mastercard?

We are the global technology company behind the worlds fastest payments processing network. We are a vehicle for commerce, a connection to financial systems for the previously excluded, a technology innovation lab, and the home of Priceless. We ensure every employee has the opportunity to be a part of something bigger and to change lives. We believe as our company grows, so should you. We believe in connecting everyone to endless, priceless possibilities.

Job Title

Sr. Software Engineer


tBeen the victim of credit card fraud and thought, Vengeance! Yeah, we get it.
tWant to feel your spine tingle by thwarting credit card fraudsters across the globe?
tInterested in creating Thats the stuff! software for combating scammers?

The Security Services team develops new capabilities for Mastercard’s fraud prevention platform. We protect cardholders / card issuers and aim to utterly eradicate credit card fraud. Our industry-leading bastion of defense processes billions of transactions per month with execution times literally 10X faster than you can blink. The Senior Software Engineer will play a critical role in creating new product functionality within this platform including world-class backend and consumer-facing features.


tPossess the aptitude to quickly learn and contribute to our complex platform.
tProvide technical expertise to ensure effective delivery of software capabilities.
tContribute to the planning and development of software solutions.
tPerform code reviews of co-workers deliverables to ensure best practices.
tProvide technical guidance to junior team members.

All About You

tConsiderate, polite, fun-loving, collaborative (cf. Bob Sutton, 2007).
tAdvanced organizational and communication skills: both verbal and written.
tAdvanced in Java development, design patterns, threading, unit testing, debugging.
tMid-level experience employing agile development strategies and ceremonies.
tBachelor’s degree in Information Systems or equivalent degree / work experience.

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.

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