Senior Software Engineer at Mastercard

Department: Engineering

Compensation

$115,000 – $184,000/yr

Location: O’Fallon, Missouri
Type: Full-time
Level: senior
Posted: Sep 20, 2026

Description

Mastercard is hiring a Senior Software Engineer to design, develop, test, and maintain Java-based backend services for its ABU platform, which supports secure account-change communication for recurring payments. The role focuses on distributed systems, architectural decisions, automated testing, performance optimization, secure coding, production support, and mentoring junior engineers. It requires strong Java, Spring Boot, distributed systems, database, cloud, and software engineering experience, and offers a base salary of $115,000 to $184,000 USD in O'Fallon, Missouri.

Required Skills

Java
Spring Boot
Spring Integration
gRPC
Apache Kafka
Oracle
SQL
AWS
Jenkins
Bitbucket
Artifactory
GitHub

Additional Information

Required Previous Experiences: Backend engineering experience with Java, Spring Boot, Spring Integration, and REST or SOAP services
Experience designing, developing, testing, and supporting enterprise-scale applications
Experience creating automated unit, functional, and integration tests in continuous integration environments
Experience with messaging, event-driven architectures, and distributed communication technologies such as Apache Kafka or gRPC
Experience supporting production systems through monitoring, observability, recoverability, and operational readiness practices
Experience with Jenkins, Bitbucket, Artifactory, GitHub, and the Atlassian suite
Preferred Qualifications: Bachelor’s degree in Computer Science, Software Engineering, or a related technical field
Experience using AI-assisted software development tools such as GitHub Copilot or Claude Code