Mastercard Jobs

Job Information

MasterCard Software Engineer II (Ruby & React) in Seattle, Washington

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

Software Engineer II (Ruby & React)

In this role You will:

  • Build complex web applications in a web framework (Ruby on Rails and React)

  • Design features where the business problem is defined but technical strategy is not

  • Write a cross­-domain JavaScript application

  • Follow and create best practices for clean code and architecture

  • Deploy and operate apps in the cloud (Amazon, Rackspace, Heroku, etc.)

  • Ensure code follows the design and insist on the highest coding standards

  • Maintain sufficiently generic yet simple and economical solution

All About You:

  • Knowledge of REST, GraphQL, SSO, and client/server interaction

  • Fluency in one or more languages like Ruby, Clojure, Scala, ReactJS, JavaScript, TypeScript, Java, Python

  • Deep understanding of internet protocols and standards

  • Proficiency with writing and optimizing cross­-browser CSS and HTML

  • Knowledgeable of scaling techniques (caching, asynchronous/background job queues, etc.).

  • Experience with SQL and NoSQL databases, and browser plugin development

  • Aptitude to quickly learn new languages and technologies as necessary

  • Experience with Agile development methodologies

  • Proven experience building highly scalable and available production web apps, from glass to the database

  • A philosophy of iteration and continuous improvement

  • A B.S. or M.S. in Computer Science or equivalent experience


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.

Everyone wants easier ways to pay;

we invent them.

Checkout lines are slow;

we speed them along.

Merchants want more sales;

we give them data and insights.

People need financial access;

we connect them.

Corporate purchasing is complicated;

we make it simple.

Commuters are busy;

we speed them on their way.

Governments need greater efficiencies;

we help create them.

Small businesses are virtual;

we give them access to a world of buyers.

Retailers want to fight fraud;

we provide the tools.

Requisition ID: R-183594