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Added 2 mins ago
Lead Space System Engineer
STR
Melbourne, FL · Woburn, MA
The SMS Sector is seeking a Lead Space System Engineer to leverage their systems engineering expertise in a dynamic Research & Development environment. In this role, you will be an integral…
Added 2 mins ago
Lead Space System Engineer
STR
Woburn, MA · Melbourne, FL
The SMS Sector is seeking a Lead Space System Engineer to leverage their systems engineering expertise in a dynamic Research & Development environment. In this role, you will be an integral…
Added 4 mins ago
Sr. GNC Engineer / Modeling & Simulation
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Chandler, AZ
You will mentor early career engineers, provide technical direction on GNC approaches, and collaborate with cross functional teams across integration, test, and analysis activities.
Added 4 mins ago
Principal Embedded Software Engineer
Terran Orbital Corporation
Irvine, CA
Terran Orbital is seeking an experienced Principal Embedded Software Engineer to join our dynamic team. Reporting to the Embedded Software & FPGA Manager, the Principal Embedded Software…
Added 7 mins ago
Software Engineer II
Mastercard
O Fallon, MO
We are currently hiring a Software Engineer II, and the successful candidate will contribute to the design, development, testing, deployment, and support of enterprise applications while…
Added 13 mins ago
Senior Test Automation Engineer
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Houston, TX
While the formal title is Senior Test Automation Engineer, this is fundamentally a Senior Software Development Engineer in Test (SDET) role that requires deep software development expertise…
Added 14 mins ago
Principal Software Development Engineer (AI Innovation)
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Remote, United States
The Principal Software Development Engineer will drive innovative, enterprise-wide solution designs at the business unit level for highly complex, strategic initiatives. In this high-impact…
Added 15 mins ago
GATEKEEPER Software Engineer-TS/SCI with Poly
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Added 15 mins ago
ES234 Principal Software Engineer - EDGE
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Added 16 mins ago
Cyber Software Engineer
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Annapolis Junction, MD
Mission Technologies is looking for a Cyber Software Engineer to join our cutting-edge Cyber and Intelligence Team. In this role, you will dive deep into mission-critical systems, driving…
Added 16 mins ago
Associate Radio Frequency Engineer
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Added 16 mins ago
Cyber - AI Engineer - Manager - Consulting
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Annapolis, MD · Baltimore, MD
As a Cyber AI Engineer, you will work with client security and engineering teams to deploy AI workflows for threat investigation, detection engineering, vulnerability analysis, and…
Added 16 mins ago
Staff Systems Engineer - I&T
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Baltimore, MD
Northrop Grumman Mission Systems' Baltimore and Partnered Sites (BaPs) division is seeking a Staff Systems Integration & Test (SI&T) Engineers in Baltimore, MD to support test and…
Added 16 mins ago
Principal / Sr. Principal Systems Engineer – I&T
Northrop Grumman
Baltimore, MD
Northrop Grumman Mission Systems' Baltimore and Partnered Sites (BaPs) division is seeking a Systems Integration & Test (SI&T) Engineers (Level 3 or Level 4) in Baltimore, MD to support…
Added 21 mins ago
AI Engineer (AI Accelerator Program)
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San Francisco, CA
Specifies, develops and executes complex test plans. Develops conversion and system implementation plans. Performs or directs highly complex data modeling, performance and integration…
Added 24 mins ago
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Software Test Engineer
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Carlsbad, CA
- From $71 USD / hour
Insight Global is looking for a Software Test Engineer to build and maintain a comprehensive test infrastructure for our software defined networking (SDN) platform. This position allows for…
Added 29 mins ago
Space Vehicle Production Engineer
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Chantilly, VA
This position is for a Space Vehicle Production Engineer in Chantilly, VA supporting cutting-edge and innovative space programs. The Space Vehicle Production Engineer will work daily…
Added 29 mins ago
UX/UI Engineer
SAIC
Alexandria, VA
SAIC is seeking a UX/ UI Engineer to support Joint Engineering and Test Enterprise Portal (JETEP) software development activities to deploy tools, capabilities, and content. The ideal…
Added 32 mins ago
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Systems Engineer 4
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- $94 to $99 USD / hour
The Space Communications Payload Systems Engineer is part of a high-performing team that is immersed in highly complex development projects. As a member of our team, you will have the…
Added 32 mins ago
Lead GNC Engineer – Flight Simulation
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Chandler, AZ
Leading the design, development, implementation, verification, and test of high‐quality flight and simulation software; owning the design and maintenance of 6‐DOF simulations used to…
Added 32 mins ago
GNC Engineer - Modeling, Simulation
Mavensoft Technologies, LLC.
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You will mentor early‐career engineers, provide technical direction on GNC approaches, and collaborate with cross‐functional teams across integration, test, and analysis activities.
Added 35 mins ago
Staff Software Engineer, CK Money
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New York, NY · Charlotte, NC
As a Staff Software Engineer on CK Money, you'll own the systems that hold our members' money: account origination and onboarding, deposits and transfers, card and payment flows, and the…
Added 36 mins ago
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- $135,000 to $220,000 USD / year
Test Engineering is a brand new team at Hadrian, built from the ground up with no legacy test framework to work around. As a Test Engineer, you'll be the responsible engineer and technical…
Added 38 mins ago
Senior Software Developer - Environmental Services
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…technologies, prototype next-generation solutions, and build software experiences that shape the future of robotic-assisted…

Mastercard

Software Engineer II

O Fallon, MO, United States

Pay Ranges O'Fallon, Missouri: $92,000 - $147,000 USD

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Job details

Pay: Pay Ranges O'Fallon, Missouri: $92,000 - $147,000 USD
Posting language: English
Posted: Nov 4, 2026

Original job description

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

Software Engineer II

About the Role

The Mastercard Remote Payment Presentment Service (RPPS) Program is engaged in developing innovative solutions to keep Mastercard positioned as a leader in delivering value-added services and seamless customer onboarding. We work collaboratively with our product partners and other technical teams to continuously improve and enhance our existing products and drive new products to the global marketplace.

We are currently hiring a Software Engineer II, and the successful candidate will contribute to the design, development, testing, deployment, and support of enterprise applications while applying software engineering principles to deliver scalable, secure, resilient, and maintainable solutions. This role will collaborate closely with cross-functional teams and contribute to continuous improvement initiatives that enhance application quality, reliability, and operational excellence.

Role

Participate in the gathering and analysis of business requirements and translate them into scalable, maintainable, and secure software solutions.
Participate in application design discussions and contribute to software architecture, design patterns, component interactions, and technology standards under the guidance of senior engineers and technical leads.
Develop solutions that align with Mastercard Enterprise Architecture standards while leveraging enterprise services, frameworks, and reusable platforms.
Contribute to ensuring product development meets Mastercard's business, scalability, performance, security, and reliability requirements.
Follow Mastercard development methodologies, engineering standards, and documentation practices when designing and building software solutions.
Participate in code reviews to improve code quality, maintainability, security, consistency, and adherence to software engineering best practices.
Collaborate with team members, share knowledge, and seek guidance from senior engineers when addressing highly complex technical challenges.
Design, develop, maintain, and support high-quality software solutions using modern software engineering principles and practices.
Design, develop, and maintain unit, functional, integration, and automated tests to validate application functionality, system interactions, quality, and reliability.
Support continuous integration and continuous testing practices to improve software quality and release confidence.
Develop and maintain software solutions that support high availability, resiliency, operational readiness, and reliability objectives.
Respond to operational and business concerns related to applications, projects, and platform enhancements to ensure consistent delivery of quality services.
Investigate and resolve production, application, integration, and infrastructure issues using structured troubleshooting, root cause analysis, and corrective actions, escalating highly complex issues when appropriate.
Support compliance with required certifications and regulatory requirements, including PCI, GLBA, Safe Harbor, and other applicable standards.
Apply secure coding practices, security-by-design principles, and vulnerability prevention techniques throughout the software development lifecycle.
Identify and remediate application security vulnerabilities while ensuring alignment with Mastercard security standards and industry best practices.
Contribute to application performance optimization through monitoring, analysis, tuning, and scalability improvements across applications, APIs, databases, and cloud environments.
Apply data structures, algorithms, and software engineering principles to develop efficient, scalable, and maintainable software solutions.
Develop, test, deploy, monitor, and support cloud-based applications and services using AWS and cloud-native technologies while following established architecture patterns and engineering standards.
Design and build solutions with operational readiness in mind, incorporating observability, logging, monitoring, alerting, supportability, reliability, and maintainability best practices.
Contribute to the continuous improvement and expansion of the platform by helping ensure that solutions remain resilient, secure, scalable, highly available, and operationally efficient.
Collaborate with product owners, business partners, and engineering teams to understand requirements and provide technical input supporting product and platform objectives.

All About You

Strong analytical, troubleshooting, and problem-solving abilities, with the ability to quickly adapt to new technologies, methodologies, and systems.
High-energy, detail-oriented, proactive, and able to function effectively in a fast-paced environment with a high degree of initiative and accountability.
Strong interpersonal and relationship-building skills with a proven ability to collaborate effectively across teams.
Excellent communication skills with the ability to interact across organizational levels and partner effectively with technical and non-technical stakeholders.
Strong understanding of data structures, algorithms, object-oriented design principles, and scalable application development techniques.
Experience developing and enhancing scalable, secure, maintainable, and high-performing enterprise software solutions.
Experience participating in code reviews and applying engineering best practices to improve software quality, maintainability, and security.
Experience developing unit, functional, integration, and automated testing solutions within enterprise applications.
Experience analyzing application performance, identifying bottlenecks, and implementing optimization improvements across applications, databases, and cloud environments.
Experience applying secure coding practices, application security principles, vulnerability remediation techniques, and OWASP-based security standards.
Proficient working with J2EE, Java 8 or higher, JSP, Servlets, Spring 5, Hibernate, and relational and non-relational database technologies including Oracle, SQL Server, MySQL, PostgreSQL, NoSQL, MongoDB, or comparable technologies.
Demonstrated troubleshooting and root cause analysis skills supporting business-critical applications in production environments.
Experience in the following is highly preferred:
Web Services (SOAP, RESTful APIs)
Servers (WebSphere, JBoss, Tomcat)
HTML, JavaScript, jQuery
UNIX (Shell, AWK scripting)
XML/XSLT
CSS
C#
React or Angular
IDEs (Microsoft Visual Studio, RAD, Eclipse)
Experience working within Agile and Waterfall delivery methodologies.
Experience developing and supporting cloud-native applications utilizing AWS cloud services.
Understanding observability, monitoring, operational readiness, and reliability engineering concepts.
Bachelor's degree in information systems, Information Technology, Computer Science, Engineering, or equivalent practical experience is preferred.

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 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 02/02/2027. If the fill date has passed, Mastercard intends to fill this position as soon as possible.

Pay Ranges O'Fallon, Missouri: $92,000 - $147,000 USD

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More about this job

Skills

Onboarding
Engineering principles
Process improvement
Architecture regulations
Documentation
CI/CD
Troubleshooting
Root cause analysis
Regulatory compliance
Design principles
Software development
Security regulations
AWS
Problem solving
Relationship building
Communication skills
Oracle Java
Oracle
Microsoft SQL Server
MySQL
PostgreSQL
NoSQL
MongoDB
API development
IBM WebSphere
Jboss
Apache Tomcat
HTML
JavaScript
jQuery
UNIX
AWK
CSS
C#
React
Microsoft Visual Studio
RAD
Agile
Computer technology
Computer science

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