Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior Software Engineer

$115k - $184k
Full-time

Mastercard

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

The AI & DPE organization powers the DMP platform—a cloud native, real time decisioning and AI inferencing system that executes Fraud Rules, drives analytics, and supports enterprise decision management at global scale. DMP enables high throughput, low latency, and resilient decision flows, while modernizing Fraud Rule Engines and integrating advanced AI capabilities.
The Senior Software Engineer will follow solution architectural designs for Fraud Rules Engines and be a hands-on Rule Author. This role is a driving force for implementation best practices, bringing strong experience writing rules and deep capability in Fraud Rule Engines. The ideal candidate is a hands-on technical expert with proven experience in large scale migrations and a strong commitment to timely delivery of key objectives. This role requires experience with Fraud Rules Engines, multiple programming languages, and AI experience, with success producing high quality project design deliverables and documentation.

Role Responsibilities:
• Proven experience in the modernization of platforms related to Fraud Rules/Engines and large-scale migrations.
• Build and operate scalable global platforms with high throughput, low latency, and 5 9’s availability.
• Serve as a hands-on Rule Author with deep experience in Fraud Rules Engines.
• Apply familiarity with AI technologies like Gen AI and LLMs relevant to Fraud Rules.
• Follow solution architectural designs and ensure alignment with business needs, infrastructure capabilities, and security and compliance requirements.
• Drive implementation best practices, with strong capability in writing rules and improving rule quality.
• Utilize programming languages such as Java, Python, or Go.
• Act as a force multiplier for automation and platform enhancements.

All About You:
• Hands-on software development experience; familiar with DevOps and IT Operations best practices.
• Experience with Fraud Rule Engines and proven experience in large-scale migrations.
• Working experience across multiple programming languages and frameworks; enjoys declarative paradigms and functional programming.
• High-energy, detail-oriented, proactive, and able to function independently under pressure.
• Passion for continuous learning and challenging opportunities.
• Strong communication skills—verbal and written—with strong relationship building, collaboration, and organizational skills.
• Drives outcomes through strong commitment to timely delivery of key objectives.
• Strong decision making skills and a continual improvement mindset.
• Solid experience with software development processes and one or more Application Lifecycle Management tools.
• Financial Domain experience, preferably Banking Domain.
• Success producing high quality project design deliverables and documentation.
• Extensive experience with relational and NoSQL databases.
• Understanding of loosely coupled and stateless systems.
• Demonstrated track record with AI.
• Familiarity with performance tuning and automation.
• Bachelor’s degree in Information Technology or Computer Science (or extensive equivalent experience).

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 click.appcast.io 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.

Pay Ranges

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

Vacancy posted 5 hours ago
Similar jobs that could be interesting for youBased on the Senior Software Engineer in O Fallon, MO vacancy
  • $115k - $184k

     ...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... 
    Senior
    Full time
    Part time
    Work experience placement
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    5 hours ago
  •  ...Senior Software Engineer Visa: No OPT EAD, US Citizen or Green Card preferred Location: Hybrid in O'Fallon, Missouri (St. Louis) Duration: at least 1 year, likelihood of extension Interview: 2 client interviews, second one on-site if... 
    Senior
    Long term contract
    Work experience placement
    Local area
    Relocation
    Flexible hours

    3B Staffing LLC

    O Fallon, MO
    5 days ago
  • $115k - $184k

     ...products and services that help people, businesses and governments realize their greatest potential. Title and Summary Senior Software Engineer Senior Software Engineer About the Role As part of a fast-paced engineering team, you will help design, build,... 
    Senior
    Full time
    Part time
    Work experience placement
    Worldwide
    Flexible hours

    MasterCard

    O Fallon, MO
    3 days ago
  •  ...Senior Software Engineer 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... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours

    Dynamic Yield

    O Fallon, MO
    5 days ago
  •  ...functionality ¿ Expertise in agile and waterfall delivery, life cycle management tools (JIRA/Rally/Rational Concert/Quality Center), software testing standards, methods and conventions. ¿ Exposure to Device/Browser compatibility ¿ Exposure on validating code review r and... 
    Senior

    Procyon TS

    O Fallon, MO
    5 days ago
  •  ...Senior Software Engineer Seeks a Senior Software Engineer who will be a crucial part of our software team. The selected candidate will have to write scalable, robust, and easy-to-maintain code, and will be required to translate software requirements into high-performance... 
    Senior
    Work experience placement

    Keylent Inc

    O Fallon, MO
    5 days ago
  •  ...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... 
    Senior

    Yantran LLC

    O Fallon, MO
    3 days ago
  • $163k

     ...realize their greatest potential. Title and Summary Senior Site Reliability Engineer Overview-The ProCOM team is looking for a Site...  ...• Support the application CI/CD pipeline for promoting software into higher environments through validation and operational... 
    Senior
    Full time
    Part time
    Immediate start
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    5 hours ago
  • $96k - $163k

     ...governments realize their greatest potential. Title and Summary Senior Site Reliability Engineer Who is Mastercard? At Mastercard technology, we...  ...our developers during the application build phase in software run principles that include operational design,... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    5 hours ago
  • $96k - $163k

     ...realize their greatest potential. Title and Summary Senior Site Reliability Engineer Overview The BizOps team is looking for a Senior...  ...• Support the application CI/CD pipeline for promoting software into higher environments through validation and operational... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours
    Shift work

    Mastercard

    O Fallon, MO
    5 hours ago
  • Backend Developer Requirement/Must Have: ~6+ years of experience in backend development using Java. ~ Strong expertise in Core Java, Spring Boot, and REST APIs. ~ Hands-on experience with Kafka / event streaming platforms. ~ Solid understanding of event-driven...
    Senior

    Cynet Systems

    O Fallon, MO
    2 days ago
  • $195k - $323k

     ...Principal Software Engineer, Senior Architect 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... 
    Senior
    Full time
    Part time
    Flexible hours

    Dynamic Yield

    O Fallon, MO
    5 days ago
  •  ...Role: - Senior Java Developer Location: - O'Fallon, MO Duration: - Long term Required Skills - Agile, API...  ...is preferred. • Advanced knowledge and understanding of Software Engineering Concepts and Methodologies is required. • Strong communication... 
    Senior
    Work experience placement

    Maintec Technologies

    O Fallon, MO
    4 days ago
  •  ...Lead Software Development Engineer Mastercard is a global technology company in the payments sector. We power payments and provide products and services for individuals and industries all around the world. Our people, technology, data and brand provide the capabilities... 
    Senior
    Local area

    Samprasoft

    O Fallon, MO
    1 day ago
  • $92k - $147k

     ...products and services that help people, businesses and governments realize their greatest potential. Title and Summary Software Engineer II Who is Mastercard? Mastercard is a global technology company in the payments industry. Our mission is to connect and... 
    Full time
    Part time
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    5 hours ago
  • $92k - $147k

     ...realize their greatest potential. Title and Summary Software Engineer II Who is Mastercard? Mastercard is a global technology...  ...maintenance of software solutions under the guidance of more senior engineers. This role is ideal for individuals who have a strong... 
    Full time
    Part time
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    5 hours ago
  • $115k - $184k

     ...products and services that help people, businesses and governments realize their greatest potential. Title and Summary Senior Software Engineer Overview We work to connect and power an inclusive, digital economy that benefits everyone, everywhere, by making transactions... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    a month ago
  • $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... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    a month ago
  • $115k - $184k

     ...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... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    25 days ago
  • $115k - $184k

     ...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... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    a month ago
  • $115k - $184k

     ...products and services that help people, businesses and governments realize their greatest potential. Title and Summary Senior Software Engineer II About the Role As a Senior Data Engineer, you’ll take ownership of building and optimizing data platforms, pipelines... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    12 days ago
  • $115k - $184k

     ...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, committed to powering an inclusive... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    a month ago
  • $115k - $184k

     ...products and services that help people, businesses and governments realize their greatest potential. Title and Summary Senior Software Engineer About Mastercard Mastercard is a global technology company in the payments industry. Our mission is to connect and... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours
    Shift work

    Mastercard

    O Fallon, MO
    a month ago
  • $115k - $184k

     ...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. We work to connect and power an... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    21 days ago
  • $115k - $184k

     ...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... 
    Senior
    Full time
    Part time
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    a month ago
  • $115k - $184k

     ...products and services that help people, businesses and governments realize their greatest potential. Title and Summary Senior Software Engineer All About Us MasterCard is a technology company in the global payments business. We connect consumers, financial institutions... 
    Senior
    Full time
    Part time
    Work experience placement
    Worldwide
    Flexible hours

    Mastercard

    O Fallon, MO
    a month ago
  • Aqua IT is seeking an AWS Cloud Engineer to join our cloud development team. The role involves collaborating in the design and implementation of AWS architectures, reviewing requirements, and monitoring operational metrics. We require candidates to have extensive experience... 
    Senior

    Aqua IT

    O Fallon, MO
    2 days ago
  • Phase2 Technology in O'Fallon, Illinois, is seeking an experienced AI/ML Engineer to architect and implement AI-driven solutions for the Defense and Intelligence sectors. You will develop production-grade machine learning systems and collaborate across teams to enhance... 
    Senior
    Remote job
    Flexible hours

    Phase2 Technology

    O Fallon, MO
    2 days ago
  • Tricon Solutions is seeking a Software Engineer in O'Fallon, Illinois. The ideal candidate thrives on designing, coding, and maintaining large data processing systems, primarily using the Spark framework with Scala. Responsibilities include developing big data processes... 
    Senior

    Tricon Solutions

    O Fallon, MO
    6 days ago
  • $77.5k - $176k

    Booz Allen Hamilton is seeking a DevOps engineer based in O'Fallon, Illinois, specializing in AI for the Department of War. This role involves streamlining IT operations and automating workflows to enhance productivity and speed in implementing Agentic AI solutions. Candidates... 
    Senior

    Booz Allen Hamilton

    O Fallon, MO
    3 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior Software Engineer. Be the first to apply!