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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer II - **Company:** Mastercard - **Location:** O'Fallon, MO, United States - **Experience:** Experienced - **Salary:** $92,000.0 - $147,000.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Java (Programming Language), Amazon Web Services, User Authentication, Automation of Tests, Microsoft Azure, Software Quality, Code Review, Cyber Security, Continuous Integration, Data Structures, Software Debugging, Software Design Patterns, DevOps, Distributed Systems, Node.Js, Object-Oriented Software Development, Performance Tuning, Software Architecture, Reliability Engineering, Secure Coding, Software Construction, Software Engineering, Software Systems, Data Logging, Performance Testing, Spring-boot, Software Security, Backend, AngularJS, Integration Tests, Solid Principles, Kubernetes, Restful APIs - **Published:** August 30, 2026 - **Apply:** https://www.techcareers.com/job.asp?id=3369783303&tx=JL3933FFP&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54 ## About the Role * Strong hands-on experience in Java, Spring Boot, and REST APIs. * Hands-on experience with Angular (2+) and Node.js. * Experience building and maintaining scalable, production-grade applications. * Strong problem-solving, troubleshooting, and debugging skills in distributed systems. * Solid understanding of software design principles, object-oriented programming, and software engineering best practices. * Understanding of software architecture concepts, design patterns, and scalable distributed application design. * Experience designing and executing unit, functional, and integration testing strategies. * Understanding of data structures, algorithms, and their application in building efficient, scalable software solutions. * Knowledge of secure coding principles, application security fundamentals, and vulnerability prevention techniques. * Experience performing code reviews and contributing to engineering quality standards. * Strong communication skills and the ability to collaborate effectively across teams. Preferred Qualifications * 3-5 years of software engineering experience. * Experience with cloud platforms such as Kubernetes, AWS, Azure, or PCF. * Exposure to CI/CD pipelines, automation, and DevOps engineering practices. * Experience with observability platforms, monitoring, logging, and operational support practices. * Exposure to performance testing, application tuning, and capacity planning. * Experience using AI-assisted development tools throughout the software development lifecycle. ## Description The Mastercard Authentication Program owns how consumer authentication works across both in-store and e-commerce use cases. This role contributes to building and operating best-in-class authentication products such as ID Check, Token Authentication Service, and Token Authentication Framework, driving adoption, scale, and revenue growth. This position sits at the intersection of Site Reliability Engineering, platform engineering, and release engineering, ensuring our platforms are scalable, resilient, secure, and production-ready across hybrid environments (Kubernetes, cloud, and on-prem). As a Software Engineer II, you will contribute to building scalable backend services using Java/Spring and modern user interfaces using Angular and Node.js within a distributed architecture. You will support end-to-end delivery including solution design, development, testing, deployment, and production support while adhering to engineering best practices for code quality, security, performance, and reliability. Working closely with cross-functional teams, you will help deliver production-grade solutions and continuously improve your skills across cloud platforms, DevOps practices, observability, and software architecture. You will also leverage AI-assisted development tools to enhance productivity and support multiple phases of the software development lifecycle. Role In this role, you will: * Design, develop, and own Java-based backend services and REST APIs in a distributed architecture. * Build and enhance UI applications using Angular and Node.js. * Own end-to-end delivery including solution design, development, testing, deployment, configuration, documentation, and operational support. * Participate in technical design sessions, architectural reviews, and solution planning to help deliver scalable, resilient, secure, and maintainable software solutions. * Ensure high-quality code through peer code reviews, automated testing, and adherence to engineering standards and best practices. * Design, develop, and maintain unit, functional, and integration tests to ensure software quality and reliability. * Apply secure coding standards and security best practices throughout the software development lifecycle, proactively identifying and remediating vulnerabilities. * Drive engineering best practices including clean architecture, performance optimization, resiliency, scalability, and observability. * Analyze application and system performance, identifying opportunities for optimization and scalability improvements. * Troubleshoot complex production issues, perform root cause analysis, and implement corrective actions to improve platform stability and operational excellence. * Collaborate with cross-functional teams to deliver high-quality software solutions that meet business and customer needs., All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must: * Abide by Mastercard's security policies and practices; * Ensure the confidentiality and integrity of the information being accessed; * Report any suspected information security violation or breach, and * Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines. ## Related Videos - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [Stop using Node.js like in 2020! What changed and what you can do today with Node.js](https://www.wearedevelopers.com/videos/100011-stop-using-node-js-like-in-2020-what-changed-and-what-you-can-do-today-with-node-js) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [DevOps Maturity Check – a way to balance autonomy and alignment](https://www.wearedevelopers.com/videos/58-devops-maturity-check-a-way-to-balance-autonomy-and-alignment) - [Next Level Enterprise Architecture: Modular, Flexible, Scalable, Multichannel and AI-Ready?](https://www.wearedevelopers.com/videos/1017-next-level-enterprise-architecture-modular-flexible-scalable-multichannel-and-ai-ready) ## Related Articles - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Best Countries for Software Engineers](https://www.wearedevelopers.com/magazine/267-best-countries-for-software-engineers) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs)