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Senior Software Engineer

Job in O'Fallon, St. Charles County, Missouri, 63366, USA
Listing for: MasterCard
Full Time, Part Time position
Listed on 2026-05-20
Job specializations:
  • IT/Tech
    Cybersecurity, Data Security, Systems Engineer, Data Science Manager
Job Description & How to Apply Below
Our Purpose

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.

Title and Summary

Senior Software Engineer

Who is Mastercard?

Mastercard is a global technology company in the payments industry. Our mission is 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. With connections across more than 210 countries and territories, we are building a sustainable world that unlocks priceless possibilities for all.

About the Role

The Internal Systems & Automation Technology team is looking for a Senior Software Engineer to drive our employee experience strategy forward by consistently innovating and problem-solving. The ideal candidate is passionate about the employee experience journey, highly motivated, intellectually curious, analytical, and possesses an entrepreneurial mindset.

Role

* Manage the program's library of documentation on tools and functions for various tools and integrations, and maintain the document solutions, design decisions, and support processes

* Collaborate with business users to gather requirements and translate them into functional app designs

* Design, build, and support applications using Power Apps (Canvas and/or Model-driven apps)

* Integrate apps with data sources such as Data verse, SharePoint, Excel, SQL, and APIs, implement workflows and automation using Power Automate where needed

* Troubleshoot, maintain, and enhance existing solutions

* Ensure applications follow organizational standards for security, governance, and performance

* Participate in code reviews and solution reviews with platform or architecture teams

All About You

The ideal candidate for this position should have:

* Proven frontend programming skills with JavaScript, HTML, Azure services

* Experience with API integrations (REST, SOAP, Python)

* Familiarity working with SQL Databases

* Strong communication skills with the ability to explain technical problems succinctly and clearly

* Capable problem-solving skills with an eagerness to learn

* Experience in Microsoft Power Apps and Understanding of Power Platform concepts and components

Mastercard is a merit-based, inclusive, equal 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. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact reasonable 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.

In line with Mastercard's total compensation philosophy and assuming that the job will be performed in the US, the successful candidate will be offered a competitive base salary and may be eligible for an annual bonus or commissions depending on the role. The base salary offered may vary depending on multiple factors, including but not limited to location, job-related knowledge, skills, and experience.

Mastercard benefits for full time (and certain part time) employees generally include: insurance (including medical, prescription drug, dental, vision, disability, life insurance); flexible spending account and health savings account; paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave); 80 hours of Paid Sick and Safe Time, 25 days of vacation time and 5 personal days, pro-rated based on date of hire;

10…
Position Requirements
10+ Years work experience
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