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Job Information

MasterCard Senior Software Engineer, Test, Crypto 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 Engineer, Test, Crypto

CipherTrace, a Mastercard company, is a rapidly growing leader in cryptocurrency intelligence and compliance. Our team has introduced novel solutions to challenges including sanctions compliance for DeFi and the Crypto Travel Rule. Our mission is to grow the blockchain economy by making crypto safe for users and trusted by governments. CipherTrace operates on a global scale to assist banks, cryptocurrency exchanges, law enforcement agencies, regulators, VASPs, and businesses in preventing fraud, human trafficking, money laundering, and other illicit activity where cryptocurrency is involved.

The ideal candidate should be a passionate, self-motivated, team player with experience working in a quickly evolving environment and who has a willingness to work and learn in a collaborative organization.


• Read and write automated tests in JavaScript/TypeScript (or other languages

as needed) and contribute to the development and maintenance of the

automated testing framework.

• Manually test new features and existing features that are not automated.

• Provide feedback on product quality and contribute to decisions to deliver a

positive user experience.

• Perform code reviews and advise developers on testability, and automated

testing best practices.

• Collaborate with customer-facing teams and product management to

understand customer needs and help prioritize bug fixes and expedite them

when needed.


• Strong skills as a software development engineer in test (or proven skills in

both development and testing, preferably with some overlap), including

experience with one or more of the following: web front-end testing, REST

testing, iOS/Android testing, data validation.

• Experience in analytical thinking, test automation, continuous integration, and

continuous delivery, data analysis and visualization, etc.

• Experience with tools such as Cypress, Postman, REST Assured, etc.

• Experience with SQL and/or NoSQL databases; for backend or data-oriented

roles, experience with big data frameworks and stream processing platforms

is also a plus.

• Good knowledge of industry-standard QA/QE best practices and a willingness

and ability to champion QE philosophy and influence others.

• Strong English communication skills (both spoken and written).

• Comfortable working with distributed and remote teams.

• Expertise in JavaScript, TypeScript, and at least one framework like Angular,

React, and Node.js.

Nice to Have

• Degree in Computer Science or related discipline.

• Experience in blockchain technologies, DeFi, law enforcement software, or


• Experience with Google Cloud, and container technologies

• Experience with Restful APIs, Kafka, and microservices.

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-170499