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 for its Builders Enablement Program to design, build, and operate scalable cloud-native software and developer-facing experiences. The role covers Java and Spring Boot backend services, React and TypeScript frontend applications, REST APIs, developer-tool integrations, automated testing, performance engineering, secure coding, incident management, code review, and technical leadership. Candidates should have extensive experience with distributed systems, cloud-native development, CI/CD, observability, and related engineering practices; a bachelor’s or master’s degree in a relevant field 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
React
TypeScript
REST APIs
Distributed systems
CI/CD
Terraform
Kubernetes
Observability
Secure coding

Additional Information

Required Previous Experiences: Experience designing and developing scalable software systems using object-oriented design, modern architecture patterns, and cloud-native practices
Experience with software development, system design, and large-scale distributed systems
Hands-on experience with performance engineering and system optimization
Experience designing extensible software architectures and integrating developer tools through APIs, plugins, and event-driven patterns
Experience with plugin-based architectures and DevOps tool integration
Experience developing and deploying cloud-native software using AWS, Kubernetes, and containerized architectures
Experience with CI/CD pipelines and Infrastructure as Code using Terraform or CloudFormation
Experience with observability platforms such as Splunk or equivalent
Preferred Qualifications: Bachelor’s or master’s degree in Computer Science, Engineering, or a related field