Jobs in the United States

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Added 9 mins ago
IR
Digital Workplace Platform Administrator
International Rescue Committee
Remote, United States
- $88,277 to $102,451 USD / year
Support risk assessments and security reviews for new AI tools or integrations by providing accurate technical context on system behavior and data flows
Added 13 mins ago
Senior Mainframe z/OS Engineer (Remote/ Work from Home)
First National Bank of Omaha
Billings, MT
The Mainframe Senior Engineer Position is part of a managed services engineering team. The Mainframe Senior Engineer is responsible for maintaining customer environments and solving…
Added 13 mins ago
PN
Electrical Engineer 3
Pacific Northwest National Laboratory
Helena, MT
- $122,100 USD / year
…energy and environmental challenges. Our more than 1,700 staff support the Department of Energy (DOE), delivering on key DOE mission areas including: modernizing our nation’s power grid to…
Added 13 mins ago
Platform Infrastructure Engineer
Maximus
Helena, MT
Maximus is seeking a highly skilled individual to join our team as a Platform Infrastructure Engineer. You will be responsible for the deployment and maintenance of several platforms…
Added 13 mins ago
Software Engineer II - Marketplace Efficiency (Bidding)
Indeed
Helena, MT
…You'll regularly collaborate beyond your immediate team to support broader initiatives and help drive projects forward, while continuing to deepen your technical expertise and grow as an…
Added 13 mins ago
Software Engineer II
Amentum
Helena, MT
The Software Engineer II will perform full stack development with C# program, ReactJS, MVC, Linq, and rest API development in NET Core platform. This position is US remote teleworking…
Added 13 mins ago
Mainframe Technical Engineer
Highmark Health
Helena, MT
…solution-oriented, and capable of collaborating across multiple teams to support a broad range of technical initiatives. The incumbent, and team, may be involved in every aspect as a part…
Added 13 mins ago
EG
Quality Assurance Engineer - PHP
Eliassen Group
Helena, MT
- $40 to $50 USD / hour
Our client seeks a results-driven Senior Quality Assurance Engineer to support Policyholder Portal applications. The role requires manual, automation, mobile, API, and database testing…
Added 17 mins ago
Lead Supplier Development, Industrialization & Quality Engineer - Battery Cell
Rivian
Irvine, CA
…As a Lead Supplier Development, Industrialization & Quality Engineer, you are an advanced individual contributor and subject matter expert responsible for the complete supplier quality…
Added 17 mins ago
Structural Safety Engineer (CAE)
Rivian
Irvine, CA
…employment, social media/website, network/device, recruiting system usage/interaction, security and preference information. Rivian may use your Candidate Personal Data for the purposes of…
Added 17 mins ago
Sr. Systems Integration Engineer, Automated Drive
Rivian
Palo Alto, CA
…employment, social media/website, network/device, recruiting system usage/interaction, security and preference information. Rivian may use your Candidate Personal Data for the purposes of…
Added 17 mins ago
Sr. Systems Integration Engineer, Automated Drive
Rivian
Palo Alto, CA
…employment, social media/website, network/device, recruiting system usage/interaction, security and preference information. Rivian may use your Candidate Personal Data for the purposes of…
Added 18 mins ago
VI
System Test Lead
Viasat, Inc.
Carlsbad, CA · Reston, VA · Germantown, MD
- $190,500 to $285,500 USD / year
We have an exciting new opportunity for a System Test Engineer to join our Government team! You will work with a cross functional team in the development of our latest generation government…
Added 18 mins ago
Systems Integration Engineer - Antenna Systems
Viasat, Inc.
Duluth, GA
…you're ready to take on something new, you'll find leaders who support your development and help you turn your ambition into…
Added 18 mins ago
PN
Senior Software Engineer III
Pacific Northwest National Laboratory
Richland, WA · Seattle, WA
- $133,100 USD / year
An accomplished engineer with strong foundations in scalable system design, SI/ML development, and production software. You're ready to lead complex system components, mentor junior…
Added 18 mins ago
PN
Early Career Software Engineer
Pacific Northwest National Laboratory
Richland, WA
- $83,100 USD / year
We are seeking a motivated Early Career Software Engineer to join our dynamic team at PNNL and contribute to cutting-edge projects that shape the future of critical technology supporting…
Added 18 mins ago
PN
Software Engineer II
Pacific Northwest National Laboratory
Richland, WA · Seattle, WA
- $109,000 USD / year
We are seeking a motivated Software Engineer to join our dynamic team at PNNL and contribute to cutting-edge projects that shape the future of critical technology supporting national…
Added 22 mins ago
Stationary Engineer
State of Connecticut
Southbury, CT
DDS is seeking a skilled and dedicated Stationary Engineer to help maintain the safe, reliable, and efficient operation of heating plants, boilers, and essential mechanical systems across…
Added 30 mins ago
J
Senior Infrastructure Security Engineer
Jobgether
Remote, United States
- $170,000 to $210,000 USD / year
…traditional insurance operations. As a Senior Infrastructure Security Engineer, you will play a dual role in strengthening cloud infrastructure and establishing robust security practices…
Added 30 mins ago
J
Java Product Engineer / Full Stack Java Developer
Jobgether
Remote, United States
- $90,000 to $110,000 USD / year
The Java Product Engineer / Full Stack Java Developer will design, develop, modernize, and support enterprise software applications in mission-critical environments.
Added 30 mins ago
IBM Maximo Senior Business Analyst
Jobgether
Remote, United States
You will leverage your expertise in IBM Maximo Application Suite to improve workflows, enhance system functionality, and ensure reliable platform performance.
Added 30 mins ago
Engineering Manager- Data Collection & Scanning
Jobgether
Remote, United States
Foster a collaborative culture in which engineers share responsibility for end-to-end system outcomes and continuously develop their technical capabilities.
Added 41 mins ago
Ground Systems Engineer I, Electrical
Rocket Lab USA
Stennis Space Center, MS
…execution history with the Electron program. GROUND SYSTEMS ENGINEER I, ELECTRICAL Based out of Rocket Lab's Test Facility at Stennis Space Center in Mississippi, the Ground Systems…
Added 42 mins ago
MS
Competitive Intelligence Spec / R70198 / Remote
Motorola Solutions
Corinth, MS
- $150,000 to $175,000 USD / year
…interview and debrief customer-facing sales directors, field application engineers, and regional support teams. Observe competitor product launches, messaging, and technology roadmaps…
Added 42 mins ago
Utility Engineering Analyst 1/2/3 Flex (PCN 086095)
State of Alaska
Anchorage, AK
If you possess the position-specific competencies noted in this recruitment, we welcome your application.

US: Mastercard Technologies, LLC

Senior Software Engineer

O'Fallon, MO, United States

Pay Ranges O'Fallon, Missouri: $115,000 - $184,000 USD

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Job details

Pay: Pay Ranges O'Fallon, Missouri: $115,000 - $184,000 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

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 our diverse customer base. 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 seeking a Senior Software Engineer to join the Mastercard Operational Reports NexGen development team to work on Enterprise Applications to deliver technical solutions using JAVA technology stacks and Angular/ React front-end technologies. The successful candidate will contribute to software architecture, performance engineering, secure software development, operational excellence, and continuous improvement initiatives while delivering highly available, resilient, and secure enterprise applications.

Role

Participate in the gathering and analysis of business requirements and translate them into scalable, maintainable, and secure software solutions.
Support the technical lead in defining application architecture, software design patterns, component interactions, and technology standards.
Ensure software designs align with Mastercard Enterprise Architecture and leverage enterprise services and reusable platforms.
Ensure product development meets Mastercard's business, scalability, performance, security, and reliability requirements.
Ensure development teams utilize appropriate Mastercard development methodologies, engineering standards, and documentation practices.
Conduct and participate in code reviews to improve code quality, maintainability, security, consistency, and adherence to software engineering best practices.
Provide functional guidance, knowledge sharing, and technical recommendations to team members when appropriate.
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, reliability, and performance.
Support continuous integration and continuous testing practices to improve software quality and release confidence.
Ensure that software and system design support the goal of zero downtime, high availability, resiliency, and operational excellence in production environments.
Respond to operational and business concerns or issues relative to business programs, projects, and platform enhancements to ensure consistent delivery of quality services.
Investigate and resolve complex production, application, integration, and infrastructure issues through structured troubleshooting, root cause analysis, and corrective action planning.
Ensure development supports all required certifications and compliance 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, assess, and remediate application security vulnerabilities while ensuring alignment with Mastercard security standards and industry best practices.
Responsible for performance engineering of enterprise software architecture through monitoring, analysis, optimization, and scalability improvements across applications, APIs, databases, and cloud services.
Apply advanced data structures, algorithms, and software engineering principles to solve complex technical challenges and optimize system performance and resource utilization.
Responsible for designing, developing, testing, delivering, monitoring, and maintaining scalable, resilient, and secure cloud architectures using AWS services and cloud-native technologies such as EC2, ECS, and S3.
Design solutions with operational readiness in mind, incorporating observability, logging, monitoring, alerting, supportability, reliability, and maintainability best practices.
Improve and expand the existing platform by ensuring that it remains resilient, secure, scalable, highly available, and operationally efficient.
Work closely with business partners on product definition, product roadmaps, business case development, and overall technology direction for the team.

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 capable of functioning under pressure in an independent environment with a high degree of initiative and self-motivation.
Strong interpersonal and relationship-building skills with a proven track record of successful collaboration across teams.
Excellent communication skills required to interact across multiple organizational levels and partner effectively with internal and external stakeholders.
Strong understanding of data structures, algorithms, object-oriented design principles, and scalable application development techniques.
Experience designing scalable, secure, maintainable, and high-performing enterprise software solutions.
Experience conducting code reviews and applying engineering best practices that improve software quality, maintainability, and security.
Experience developing unit, functional, integration, and automated testing solutions within enterprise applications.
Experience identifying application bottlenecks and implementing performance optimization strategies 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 non-relational database technologies including Oracle, SQL Server, MySQL, PostgreSQL, NoSQL, MongoDB, or similar technologies
Strong troubleshooting and root cause analysis skills with experience supporting critical business applications in production environments.
Experience in the following is a 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 with development tools including Maven, Gradle, Jenkins, Chef, SonarQube, and related DevOps toolsets.
Experience working within Agile and Waterfall delivery methodologies.
Prior experience in cloud-native application development and AWS cloud services.
Strong understanding of observability, monitoring, operational readiness, and reliability engineering concepts.
Excellent knowledge of data engineering concepts and preferred experience working with DCP, Databricks, AWS, and large-scale enterprise data platforms.
Bachelor's degree in information systems, Information Technology, Computer Science, Engineering, or equivalent 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: $115,000 - $184,000 USD

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