Software Engineer II
$92k - $147kMastercard
Software Engineer II
About the Role
Mastercard's Services Technology organization is seeking a Software Engineer II to contribute to the design, development, testing, deployment, and operational excellence of software solutions that support AI & Decision Product Enablement (DPE) platforms. These platforms power intelligent decisioning, real-time analytics, and fraud prevention capabilities at global scale.
•Design, develop, test, deploy, and support automated software solutions that validate applications, services, APIs, and system integrations throughout the software development lifecycle.
•Translate business, functional, and technical requirements into scalable, maintainable, and automated validation solutions.
•Contribute to software design and architecture discussions, applying appropriate testing approaches, automation frameworks, engineering standards, and design patterns.
•Develop and maintain automated test frameworks, utilities, and reusable components that improve software quality, reliability, and delivery efficiency.
•Write secure, high-quality code while adhering to established coding standards, secure development practices, and team processes.
•Participate in code reviews to improve code quality, maintainability, security, automation coverage, and overall engineering excellence.
•Develop and maintain unit, functional, integration, performance, regression, and end-to-end automated tests to ensure quality and reliability.
•Troubleshoot, debug, and analyze defects, test failures, and application issues to identify root causes and improve system stability.
•Partner closely with software engineers to embed quality throughout the development lifecycle, ensuring appropriate test coverage, monitoring, performance validation, and operational readiness.
•Analyze and optimize automation frameworks, test execution processes, and validation capabilities to improve scalability, reliability, and efficiency.
•Design, generate, and manage test data, environments, and test execution activities required to support delivery objectives.
•Build automated quality solutions that integrate with CI/CD pipelines and deployment processes to support continuous testing and release confidence.
•Participate in Agile planning, story refinement, requirements elaboration, estimation, prioritization, and delivery activities.
•Collect, analyze, and communicate quality metrics, test results, risks, and recommendations to technical and non-technical stakeholders.
•Create and maintain technical documentation for automation frameworks, testing approaches, quality strategies, and delivered solutions.
•Collaborate with peers to solve technical challenges, share knowledge, improve engineering practices, and support Software Engineering Guild initiatives.
•Continuously learn and adopt new technologies, testing approaches, tools, and development practices that improve software quality and engineering outcomes. All About You
•3+ years of hands-on Java development experience building, testing, deploying, and supporting enterprise applications.
•Experience developing and maintaining automated test frameworks and test suites, including hands-on experience with Selenium.
•Understanding of software engineering fundamentals, object-oriented design, common design patterns, and the software development lifecycle (SDLC).
•Experience with CI/CD pipelines, source control, automation, and modern software delivery practices.
•Experience creating and executing unit, integration, regression, and end-to-end tests to ensure software quality and reliability.
•Familiarity with gRPC or similar API technologies and service-to-service integrations.
•Strong troubleshooting, debugging, and root-cause analysis skills, with experience diagnosing issues across distributed systems.
•Knowledge of secure coding practices, code reviews, and software quality standards.
•Experience working in Agile environments utilizing Scrum, Kanban, or similar methodologies.
•Strong collaboration and communication skills with technical and non-technical stakeholders.
•Demonstrated curiosity, adaptability, and a commitment to continuous learning and knowledge sharing. Ideal Candidate Profile
•Software engineer first, with a passion for quality and automation.
•Brings a strong foundation in Java development and modern engineering practices.
•Understands how quality engineering integrates into the software delivery lifecycle and CI/CD pipeline.
•Collaborates effectively across teams, embraces feedback, and contributes to a positive engineering culture.
•Comfortable navigating ambiguity, solving complex problems, and driving solutions through delivery.
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 View email address on decentrajobs.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 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 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. THIS POSTING RELECTS ONE OR MORE CURRENT VACANCIES ON OUR TEAM, AND MASTERCARD INTENDS TO FILL THIS POSITION BY 12/30/2026.
Pay RangesO'Fallon, Missouri: $92,000 - $147,000 USD
$92k - $147k
...of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Software Engineer II About the Role The Mastercard Operational Intelligence Program is engaged in developing innovative solutions through technology...SuggestedFull timePart timeImmediate startWorldwideFlexible hours- Software Engineer II Location: OFallon, MO Program Overview: Sustainability and Innovations Program aims to develop Mastercard sustainability solutions and innovative products for Consumer solutions. S&I program team is looking for a high-energy, detail-oriented individuals...SuggestedLocal area
- Excellent communication skills with the ability to communicate with all levels of management Ability to build rapport and relationships Someone understanding the concept of operations first, focusing on usability, operability of applications from the get go Problem solver...Suggested
- ...Site Reliability Engineer II At Mastercard technology, we work to connect and power an inclusive, digital economy that benefits everyone... ...support our developers during the application build phase in software run principles that include operational design, automation,...Suggested
$92k - $147k
...of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Software Engineer II The Core Payments department is hiring a highly motivated Software Engineer II with a passion for Artificial Intelligence...SuggestedFull timePart timeWorldwideFlexible hours$92k - $147k
...of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Software Engineer II About the Role The Authentication Program develops and operates Mastercard's authentication solutions that help make digital...Full timePart timeImmediate startWorldwideFlexible hours$92k - $147k
...of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Software Engineer II Overview: At Mastercard, our industry expertise is enhanced by our commitment to being a force for good in the world and...Full timePart timeImmediate startWorldwideFlexible hours$92k - $147k
...Data Engineer II The Operational Insights Analyst II role within the Program Controls, Operations & Modernization (ProCOM) Office establishes and strengthens a scalable "risk intelligence layer" across incident management and operational governance. This role transforms...Full timePart timeWork at officeFlexible hours$92k - $147k
...of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Software Engineer II - Full Stack & AI Overview The Decision Services Technology team within Mastercard's Business & Market Insights organization...Full timePart timeImmediate startWorldwideFlexible hours$92k - $147k
...of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Data Engineer II Overview: Mastercard’s Enterprise Credit Risk (ECR) team is seeking a Data Engineer II to design, build, and maintain data...Full timePart timeWorldwideFlexible hours3 days per week- ...Software Development Engineer II Location: O'Fallon, Missouri (1000 Technology) Duration: 12 Months Job Overview • Responsible for the analysis, design, development and delivery of software solutions. • Define requirements for new applications and customization...Work experience placement
- ...Qlik Software Engineer (hybrid-remote)*This is a 24 month contract to hire role (hybrid-remote)PRIMARY RESPONSIBILITIESDevelop both internal and external dashboards using QlikWork closely with team members from across Client to identify functional and system requirementsWork...Contract workRemote work
- Network Engineer Our customer, the Defense Information Systems Agency (DISA), provides, operates... .../Global Solutions Management-Operations II (GSMO-II) contract has an opening for a... ...tasks which include hardware and software design and implementation. Basic Qualifications...Contract work
- ...Senior Software Development EngineerLocation: O'Fallon, Missouri (1000 Technology)Duration: 24 MonthsConversion to an employee prior to... ...several years.Part of the CERA program and part of the software engineer guild as a participant.Development team for a component that...For contractorsWork experience placementBank staffFlexible hours
$72k - $115k
...set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Software Engineer I Who is Mastercard? We work to connect and power an inclusive, digital economy that benefits everyone, everywhere, by...Full timePart timeWork experience placementImmediate startWorldwideFlexible hours- Software Engineer Location: OFALLON Roles and Responsibilities: Work closely with software engineers, product managers, and other stakeholders to identify and understand the API requirements. Design and develop the API interface and documentation using programming languages...
$115k - $184k
...products and services that help people, businesses and governments realize their greatest potential. Title and Summary Senior Software Engineer Who is Mastercard? We work to connect and power an inclusive, digital economy that benefits everyone, everywhere, by...Full timePart timeWorldwideFlexible hours- ...APPLICATIONS SENT TO THE AFOREMENTIONED EMAIL WILL BE CONSIDERED. Employer's Name: Mastercard Technologies, LLC Job Title: Senior Software Engineer (O'Fallon, MO) Position Duties : Leads end to end design and development of major modules, projects, and large scale...Remote workWork from home
- Principal Software Engineer O Fallon - O Fallon, MO 63366 Overview Position Type Regular Full Time Job Shift Day Education Level 4 Year Degree Category Engineering Description The Principal Software Engineer is the senior-most technical authority for True Manufacturing'...Full timeContract workWork at officeRemote workMonday to FridayShift work
- Job Title Bachelor’s degree in information systems, information technology, computer science, engineering, or equivalent work experience. More than 7 years of industry experience. Excellent communication skills, with the ability to interact across multiple organizational...Work experience placement
$78 - $88 per hour
Role: Senior Software Engineer No. of Position(s) 1 Job Location: Ofallon, MO, US Bill Rate Range $78-88/hr Employment Type Temporary Estimated Duration (In Months) 13 Work Model Hybrid Must have Skills/Attributes Angular, CSS, HTML, Java, JavaScript, React Shift 8AM CST...Temporary workShift work- ...Under a new CEO, *** is committed to a transformative journey with 'Scale @ Speed' as our guiding principle. Role Overview: As a Software Engineer in Corporate Solutions at you'll work with modern full-stack development practices with a focus on microservice and database...
- Sr. Software Engineer Backend Developer, Java Spring Boot, event driven architecture (Kafka) Knowledge / Experience: Experience with large scale software development or application engineering with recent coding experience in two or more of the following languages: Java...
- Senior Software Engineer About the Role The Mastercard Operational Intelligence Program is engaged in developing innovative solutions through technology that keeps Mastercard positioned as a leader in delivering value-added business analytics and reporting solutions to...Full timePart timeFlexible hours
- ...Day -1 Onsite Project Scope: Seeks a Senior Software Developer who will be a crucial part of our software team. The... ...testing framework. Education • Bachelor's in engineering (preferably) • Masters or MBA "Tech Mahindra is an Equal Employment...
- ...a Credit Card Company, is looking for a Senior Java Fullstack Engineer for their O Fallon, MO/Hybrid location. Responsibilities... ...executes key elements of projects/processes within the Software Engineering area by applying in-depth knowledge of their discipline...Work experience placement
- ...Duration: Long Term Project Scope: Seeks a Senior Software Developer who will be a crucial part of our software team.... ...solid understanding of the BDD testing framework. Education Bachelors in engineering (preferably) Masters or MB...Contract work
- ...Consultant Software Engineer Been the victim of credit card fraud and thought, Vengeance! Yeah, we get it. Want to feel your spine tingle by thwarting credit card fraudsters across the globe? Interested in creating Thats the stuff! software for combating scammers?...
- ...performance code reviews, build test strategy, coordinate with cross-functional teams and support operational issues ~ Expert in modern software design principles such as SOLID, DRY, and Single responsibility ~ Experience in technology stack (PCF, NiFi, NATS, Kafka,...
- Java Developer Location: O’Fallon, MO – Day 1 Onsite – No Remote Duration: Long Term Passport copy mandatory to submit the profile Job Description: • Overall 8+ years of experience must • Experience in object-oriented programming and concepts • Experienced...Remote work
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Software Engineer II. Be the first to apply!
- software development engineer aws O Fallon, MO
- part time software developer remote O Fallon, MO
- software developer O Fallon, MO
- software engineer amazon O Fallon, MO
- senior software engineer O Fallon, MO
- software engineer O Fallon, MO
- information technology software engineer O Fallon, MO
- senior software engineer ruby on rails O Fallon, MO
- software developer positions O Fallon, MO
- software engineer full time O Fallon, MO


