📍
O Fallon, IL

Software Development Engineer II

No experience
Finance
Software engineering
Posted:
December 29, 2025

Mastercard

Worldwide payments technology and solutions provider
79
Palpable Score
Apply >view company >

Role:

• A hands-on full stack engineer that can code and build high quality secure front end and REST API/backend that is modular, functional, and testable.

• Contribute to all parts of the software’s development including design, development, test, deployment, support, documentation, configuration

• Build performant, scalable and secure web applications.

• Follow given directions and procedures in software delivery tasks (code development, test, deployment)

• Provide guidance and direction on systems and web application architecture and system design.

• Guide and coach less experienced engineers.

• Focus on user-centered design and problem solving

• Participate and drive design, technical and code reviews.

• Implement coding standards and approaches.

• Promote an Agile approach to software development. Insist on a culture of continuous integration and delivery, automation and minimizing blast radius.

• Demonstrate active learning and sharing of software practices via Guild/Engineering community initiatives

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All About You:

• Successfully designed and developed externally facing web applications utilizing modern single page application frameworks.Good knowledge of Spring, Spring Data JPA, REST and other frameworks

• Full stack developer with ability to write secure code in backend & frontend programming languages (Java, JavaScript, Angular, SQL) and familiar with secure coding standards and vulnerability management

• Possess an understanding of multi-tier web development; including knowledge of server-side technologies and databases.

• Passion for improving code quality using approaches such as unit and end to end testing.

• Understanding of web application optimizations such as progressive web apps, web workers, browser repaints and reflows, performance and memory optimizations, debugging leaks, caching, flame graphs.

• Experience and knowledge of authentication and authorization workflows using concepts like JWT.

• Deep knowledge of continuous integration and delivery and toolsets that provide this ability.

• Understanding of agile principles and methodologies.

• Use and understand Git based source control systems.

• Previous experience implementing and complying with ADA and WCAG requirements.

• Strong analytical and excellent problem-solving skills

About the company

Mastercard

Company overview
Mastercard operates a global payments network that routes, clears, and settles card and other payment transactions across countries and currencies. The company also sells value-added services and solutions, including security solutions, consumer acquisition and engagement services, business and market insights, digital and authentication solutions, and processing and gateway services. The company serves financial institutions, merchants, governments, fintechs, and partners with technology and data products alongside the network. Mastercard is a public company headquartered in Purchase, New York.

Locations and presence

Mastercard employed approximately 35,300 people globally as of December 31, 2024, with around 69% of employees based outside the United States across more than 90 countries. Mastercard describes a hybrid work approach for non-remote roles that averages at least three days per week in the office, alongside flexibility programs such as a four-week “work from elsewhere” policy.

Palpable Score

79
/ 100
Mastercard is a strong early-career option because Mastercard runs paid internships with a stated path into the Launch graduate program, and Mastercard also backs recent grads with an 18-month structured development journey. The main limits are predictability and consistency across teams: candidates report a wide range of interview styles depending on role, and the company’s pay transparency is strong in some markets but not universal.
view full company profile >

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