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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full Stack Software Engineer - **Company:** Mastercard - **Location:** O'Fallon, MO, United States - **Experience:** Expert - **Salary:** $115,000.0 - $184,000.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Amazon S3, Application Integration Architecture, Application Performance Management, Code Review, Cyber Security, Databases, Continuous Integration, Data Governance, Data Profiling, Data Structures, DevOps, Distributed Systems, Apache Hadoop, Hadoop Distributed File System, PostgreSQL, Meta-Data Management, Metadata Repositories, Microsoft SQL Server, MongoDB, MySQL, Oracle (Applications), Performance Tuning, Swagger, Secure Coding, Software Engineering, Systems Integration, Openapi, Data Import/Export, Enterprise Software Applications, ReactJS, Software Security, AngularJS, Integration Tests, Deployment Automation, Performance Monitor, Restful APIs, Jenkins, Microservices - **Published:** September 4, 2026 - **Apply:** https://www.wayup.com/i-j-Senior-Full-Stack-Software-Engineer-Mastercard-748167280661802/ ## About the Role 5+ years of software engineering experience building and supporting enterprise applications. -Strong React, Angular, and Java development expertise. -Proven success delivering scalable, multi-tier applications. -REST API design, integration, and Swagger/OpenAPI documentation. -Technical design experience within distributed systems and microservices environments. -Strong foundation in data structures, algorithms, and software engineering principles. -Experience integrating applications across databases, platforms, and data sources. -Familiarity with Oracle, PostgreSQL, SQL Server, MySQL, MongoDB, Hadoop/HDFS, or Amazon S3. -CI/CD, Jenkins, and modern DevOps practices. -Unit, functional, and integration testing methodologies. -Secure coding practices and application security fundamentals. -Code review, performance optimization, and production support experience. -Skilled at troubleshooting complex technical issues and identifying root causes. -Ability to mentor engineers and influence engineering best practices. -Adaptability to evolving technologies, priorities, and business needs. -Familiarity with data catalogs, metadata management, or data governance platforms is preferred. ## Description We are seeking a Senior Full Stack Software Engineer with strong React, Angular, and Java development expertise to help build and enhance the applications that power these capabilities. This role combines application development, system integration, technical design, and collaboration across multiple teams to deliver scalable, secure, and maintainable solutions. As a Senior Full Stack Software Engineer, you will: -Design, build, and enhance enterprise applications using React, Angular, and Java. -Translate business requirements into effective technical solutions. -Contribute to technical planning, estimation, software design, architecture, testing, and delivery. -Create RESTful APIs and integrations that connect data catalog tools with -enterprise platforms and data sources. -Build capabilities that support metadata discovery, data profiling, business glossaries, search, enrichment, and bulk data uploads. -Develop services that retrieve, transform, store, and transfer data between systems. -Partner with Product Managers, Data Scientists, Data Governance professionals, and engineers to deliver roadmap priorities. -Evaluate development approaches and recommend engineering best practices. -Advance CI/CD pipelines, deployment automation, stability testing, and performance monitoring. -Implement unit, functional, and integration testing to support reliable software delivery. -Apply secure coding practices throughout the software development lifecycle. -Conduct code reviews and provide technical guidance to other engineers. -Improve application performance, scalability, reliability, observability, and supportability. -Diagnose complex application, integration, and production issues and implement lasting solutions. -Contribute to the continued improvement of team services, development standards, and DevOps practices., 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 - [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) - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [The Road to MLOps: How Verivox Transitioned to AWS](https://www.wearedevelopers.com/videos/1050-the-road-to-mlops-how-verivox-transitioned-to-aws) - [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) - [Enterprise-Cloud-Native - Fast-Paced Development & Deployment in a Highly Secure Banking Environment](https://www.wearedevelopers.com/videos/671-enterprise-cloud-native-fast-paced-development-deployment-in-a-highly-secure-banking-environment) - [Migrating half a million users to a new payment service provider](https://www.wearedevelopers.com/videos/730-migrating-half-a-million-users-to-a-new-payment-service-provider) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [The Best X (Twitter) Accounts for Developers](https://www.wearedevelopers.com/magazine/294-the-best-x-twitter-accounts-for-developers)