Senior Java Full-Stack & AI Engineer

Mastercard; O’Fallon (MO); On-site; USD 115,000 - 184,000; Full time

Benefits offered by this job

Medical, dental, vision insurance

401k with company match

Paid vacation and parental leave

Tuition reimbursement

Job summary

Mastercard is seeking a Senior Software Engineer - Java Full Stack & AI to join the Decision Services Technology team. You will develop analytics, reporting, and intelligence solutions to investigate transactions, detect fraud patterns, and power AI-driven automation across full-stack, cloud, data, and AI technologies.

You will independently deliver complex solutions, mentor engineers, and drive engineering excellence while collaborating with Product and Architecture leadership to advance

Qualifications

• Bachelor's degree in Computer Science, Engineering, Information Technology, or related field, or equivalent experience.
• 6+ years developing enterprise software solutions.
• Advanced proficiency in Java 8+ and Spring Boot.
• Deep understanding of REST APIs, microservices, and distributed systems.
• Strong knowledge of React, Angular, or comparable frontend frameworks.
• Expertise in Oracle or SQL-based database development.
• Familiarity with CI/CD practices and modern engineering workflows.
• Knowledge of Python for AI, automation, and data-driven applications.
• Exposure to GitHub Copilot or similar AI-assisted development tools.
• Strong troubleshooting, debugging, and analytical capabilities.
• Ability to independently deliver complex technical solutions with minimal oversight.

Responsibilities

• Design, develop, test, deploy, and support complex software solutions.
• Build scalable APIs, backend services, and modern web applications.
• Utilize Java, Spring Boot, React or Angular, and Python across the stack.
• Lead implementation efforts for AI-enabled capabilities and automation initiatives.
• Drive technical solutions from requirements through deployment.
• Contribute to architecture decisions and system design discussions.
• Guide technical implementation across distributed and cloud-based systems.
• Support integration of AI and ML capabilities into business products.
• Champion testing, secure coding, and code quality standards.
• Conduct code reviews and mentor engineers through technical feedback.
• Lead troubleshooting and root-cause analysis for complex issues.
• Improve observability, automation, performance, and readiness.
• Drive continuous improvement across engineering lifecycle.
• Partner with Product, Architecture, and Engineering leadership.
• Mentor engineers and influence engineering best practices.
• Contribute to Agile planning, estimation, and delivery leadership.

Skills

Strong troubleshooting

Mentoring engineers

Analytical thinking

Ownership

Independence

Education

Bachelor's degree in Computer Science, Engineering, IT, or related field

Tools

Java

Spring Boot

REST APIs

Microservices

Distributed systems

React or Angular

Oracle/SQL databases

CI/CD

Python for AI/automation

GitHub Copilot

AWS/Azure/GCP

Job description

Mastercard is seeking a Senior Software Engineer - Java Full Stack & AI to join the Decision Services Technology team. You will develop analytics, reporting, and intelligence solutions to investigate transactions, detect fraud patterns, and power AI-driven automation across full-stack, cloud, data, and AI technologies.

You will independently deliver complex solutions, mentor engineers, and drive engineering excellence while collaborating with Product and Architecture leadership to advance