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Job Title: Lead Software Engineer
Company Name: Mastercard
Location: O'Fallon, MO United States
Position Type: Full Time
Post Date: 01/16/2026
Expire Date: 02/15/2026
Job Categories: Computers, Software, Engineering, Information Technology
Job Description
Lead Software Engineer

Our Purpose

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build asustainableeconomy where everyone can prosper. We support a wide range of digital payments choices, making transactionssecure, 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

Lead Software Engineer

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.

Overview

Responsible for the analysis, design, development and delivery of software solutions

Defines requirements for new applications and customizations, adhering to standards, processes and best practices

Responsibilities

Own complex problems having dependency across services and facilitate cross-functional team interactions to drive resolution

Write code to build and enhance applications/services and promote code-reviews, code scanning, and other standard development practices to deliver high-quality artifacts to production.

Define, design, and develop procedures and solutions at a service level to meet the business requirements/enhancements

Drive prioritization decisions and trade-offs in working with product partners

Identify opportunities and build roadmaps to enhance primary service/function

Automate and simplify all aspects of software delivery and development actively evangelizing the need to automate and simplify where needed.

Drive seamless integration across all connected services to meet end-user expectations

Drive blameless postmortems culture to identify root causes of incidents and implement learnings

Introduce new technologies and architecture by following enterprise guidelines

Advocate for engineering principles outside of current organization/platform

Provide development and architecture guidance to team members

Build relationships and effective partnerships across organizations

Write and evaluate recommendations for job promotions based on an unbiased view of one's accomplishments

Conduct technical interviews for hiring engineering staff and raising the performance bar

Lead by example with hands-on approaches to demonstrate engineering excellence

Encourage staff to share and seek knowledge within their Guild/Program to drive reuse of patterns/libraries/practices and enhance productivity

About You:

Has ability to write secure code in three or more languages (e.g., Java, JavaScript, C, C++, SQL)

Familiar with secure coding standards (e.g., OWASP, CWE, SEI CERT) and vulnerability management

Has skills in building applications using open frameworks to achieve reuse and reduce development times (e.g., Spring Boot, Steeltoe, Angular, DXP, others)

Understands internals of operating systems (Windows, Linux) to write interoperable and performant code

Able to perform debugging and troubleshooting to analyze core, heap, thread dumps and remove coding errors

Has skills to document and coach team on the development practices and coding guidelines (e.g., branching, peer reviews, library use, logging, scanning rules, test-driven development, error handling)

Understands use cases for advanced design patterns (e.g., service-to-worker, MVC, API gateway, intercepting filter, dependency injection, lazy loading, all from the gang of four) to implement efficient code

Has skills to undertake a technical review of code across applications and their dependencies to look for anti-patterns and promote continuous refactoring

Understands and elaborates technical debt and operational issues to drive prioritization discussions with stakeholders to improve the run experience

Understands system architecture to plan for platform and infrastructure capacity (e.g., database, compute, network, storage) and drives the dependency prioritization to reduce the delivery lead time

Has skills to understand customer journeys and ensure a good customer experience by continuously reducing mean time to mitigate (MTTM) for incidents and ensuring high availability (99.95% as a starting point)

Has skills to simplify deployment and eliminate software and infrastructure snowflakes using standardized platforms, ephemeral instances, and automation

Has skills to orchestrate release workflows and pipelines and apply standardized pipelines via APIs to achieve CI and CD using industry-standard tools (e.g., Jenkins, Bamboo, AWS/Azure pipelines, XL Release, others)

Able to configure rules and build automation for code with vulnerability scanning and software composition analysis using standard tools (e.g., Sonar, Checkmarx, Nexus, JFrog XRay, Veracode, others)

Has skills to define, organize, and report on test runs for major, minor, and hotfix releases (including unit, component level, system level, customer journeys, past customer issues, and regulatory controls)

Has skills to conduct various performance tests (e.g., load, spike, breakpoint, endurance) to Understands application/service limits and behaviors

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_accommodation@mastercard.com 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 Mastercards 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 Mastercards guidelines.

In line with Mastercards 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 annual paid U.S. observed holidays; 401k with a best-in-class company match; deferred compensation for eligible roles; fitness reimbursement or on-site fitness facilities; eligibility for tuition reimbursement; and many more. Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty leave; and on-site fitness facilities in some locations.

Pay Ranges

O'Fallon, Missouri: $140,000 - $231,000 USD

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Contact Information
Company Name: Mastercard
Website:https://click.appcast.io/t/9ZVrJIq7UOTJA-fH6BpCKfv5yd3CFG7vYbi3NBDUDXL7QKAUBg0gbc5YCTtizGP1
Company Description:

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