Senior Software Engineer at Mastercard

Department: Engineering

Compensation

$115,000 – $184,000/yr

Location: O’Fallon, Missouri
Type: Full-time
Level: senior
Posted: Sep 17, 2026

Description

Mastercard is hiring a Senior Software Engineer, Java Site Reliability Engineer, for its Send payment platform. The role combines Java application development with distributed-systems architecture, cloud infrastructure, APIs, observability, incident response, security, performance tuning, and operational automation. Candidates need hands-on experience with Java, Spring Boot, microservices, Kubernetes, AWS or Azure, and production support; payment-processing experience is preferred. The role is based in O'Fallon, Missouri, with a base salary of $115,000–$184,000 USD.

Required Skills

Java
Spring Boot
Microservices
Kubernetes
AWS
OpenTelemetry
CI/CD
Incident response
API security

Additional Information

Required Previous Experiences: Deep hands-on experience building Java-based distributed systems
Experience developing enterprise applications with Java, Spring Boot, microservices, and cloud-native technologies
Experience translating business requirements into technical designs, architecture decisions, and API specifications
Experience with production support, on-call operations, incident management, root cause analysis, and service ownership
Experience implementing observability and monitoring solutions with OpenTelemetry and Dynatrace
Experience with encryption, secrets management, API security, and enterprise data protection standards
Experience with performance tuning, capacity planning, resiliency testing, and high-volume transaction systems
Hands-on experience supporting containerized workloads on Kubernetes, PCF, AWS, or Azure
Preferred Qualifications: Experience in payment processing, financial services, or other high-volume transaction environments