Senior Software Engineer

Mastercard•O'fallon, MO

2d•$115,000 - $184,000•Onsite

About The Position

Responsible for the analysis, design, development, testing, and delivery of secure, scalable software solutions. Define requirements for new applications and customization adhering to Mastercard standards, processes, and best practices. Develop, customize, and test applications to integrate to Mastercard specifications. Provide leadership, mentoring, and technical training to other team members.

Requirements

Strong understanding of software design, architecture, data structures, secure development practices, testing, and performance optimization.
Strong programming and automation skills using Java, Groovy, or similar languages
Experience designing, building, testing, deploying, and maintaining software applications using engineering best practices.
Strong understanding of service-oriented, microservices, and API-driven architectures
Experience building and supporting scalable backend services, APIs, and distributed systems
Experience designing, building, and maintaining CI/CD pipelines to enable reliable, automated, and high-quality software delivery.
Hands-on experience with DevOps tools such as Git/Bitbucket, Jenkins, XLR, Chef, Artifactory, Docker Registry, and similar platforms
Experience automating infrastructure provisioning, configuration management, deployments, and operational workflows
Knowledge of observability, monitoring, logging, production support, and security best practices including authentication, authorization, secure API design, and data protection
Ability to collaborate effectively in a globally distributed engineering environment to improve software delivery processes
Demonstrate a continuous learning mindset with interest in AI-driven automation, innovation, and operational efficiency
Bachelor's degree in Information Systems, Information Technology, Computer Science, Engineering, or equivalent work experience.

Responsibilities

Plan, design, architect, and develop secure, scalable, and maintainable technical solutions and alternatives to meet business requirements in adherence with Mastercard standards, processes, and best practices
Lead day-to-day system development and maintenance activities of the team to meet service level agreements (SLAs) and create solutions with a high level of innovation, cost effectiveness, quality, reliability, and faster time to market.
Accountable for the full systems development life cycle including creating high-quality requirements documents, use cases, designs, and other technical artifacts including but not limited to detailed test strategies, performance benchmarking, release rollout and deployment plans, contingency/back-out plans, feasibility studies, cost and time analysis, and detailed estimates.
Design, develop, test, deploy, and maintain software applications while applying software engineering best practices, secure coding standards, and effective use of data structures
Perform system maintenance, production incident management, troubleshooting, root cause analysis, remediation, and on-call support while ensuring operational reliability and observability
Select appropriate technical frameworks and solution delivery methodologies. Adapt technical artifact templates based on project and technology needs. Contribute ideas to help ensure required standards and processes are in place. Maintain solution and technology roadmaps
Research and evaluate current and upcoming technologies and frameworks.
Participate in PoCs (Proof of Concept) and help the department with selection of vendor solutions, technologies, methodologies, and frameworks.
Collaborate with vendor resources for product support
Conduct brownbag sessions on new and upcoming technologies, methodologies, and application-appropriate frameworks. Ensure knowledge transfer of vendor technology to Mastercard staff and provide technical training to team members
Follow and promote Quality Assurance and Quality Control processes in the department. Actively look for opportunities to enhance standards and improve process efficiency. Mentor and guide team members during all phases of the SDLC
Ensure adequate test coverage through unit, functional, integration, and performance testing. Perform quality inspections and walkthroughs throughout the SDLC including requirements reviews, design reviews, code reviews, and security reviews to ensure compliance with Mastercard standards.
Coordinate offshore development and manage day-to-day activities.

Benefits

insurance (including medical, prescription drug, dental, vision, disability, life insurance)
flexible spending account and health savings account
16 weeks of new parent leave
up to 20 days of bereavement leave
80 hours of Paid Sick and Safe Time
25 days of vacation time
5 personal days
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