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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior 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 Web Services, Automation of Tests, Microsoft Azure, Big Data, Software Quality, Continuous Delivery, Continuous Integration, Distributed Systems, Event-Driven Programming, Fault Tolerance, File Transfer, Spring Framework, Performance Tuning, Scrum Methodology, RabbitMQ, Cloud Services, Google Cloud, Concurrency, Spring-boot, Backend, Apache Kafka, Build Tools - **Published:** July 10, 2026 - **Apply:** https://www.juju.com/job/00000000gf9vo4 ## About the Role Strong written and verbal communication skills, with the ability to clearly articulate technical concepts and collaborate across functions. Hands-on experience building backend platforms using Java and Spring (Spring Boot preferred). Knowledge working with event driven platforms, such as Apache KAFKA, RabbitMQ, NATS, or other equivalents. Experience working with Cloud Services, such as AWS, GCP, Azure, or PCF. Proven experience developing and operating mission-critical, highly available systems in production environments. Strong understanding of distributed systems, including scalability, fault tolerance, concurrency, and performance tuning. Experience working with global, geographically distributed teams. Solid experience working in an agile (Scrum / SAFe) environment. Demonstrate a sense of ownership and accountability for delivered software and operational outcomes. ## Description _Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential._, We are seeking a Senior Software Engineer to join our File Transfer platform team, responsible for building and operating mission-critical, highly available services that support secure, large-scale data movement across global environments. This role is hands-on and requires deep expertise in Java and Spring-based platforms, strong engineering ownership, and the ability to collaborate effectively with distributed teams in an agile delivery model. Role Design, build, and maintain highly available, resilient Java Spring-based services supporting enterprise-grade file transfer workloads. Contribute to the end-to-end lifecycle of platform capabilities, from design and development through production support and continuous improvement. Build systems with a strong focus on reliability, scalability, security, and performance, suitable for mission-critical environments. Partner with global engineering, SRE, product, and operations teams to deliver features and resolve complex production issues. Drive engineering best practices, including code quality, automated testing, CI/CD, and operational readiness. Participate actively in agile ceremonies (sprint planning, reviews, retrospectives) and contribute to continuous delivery. Support platform observability, incident analysis, and post-incident improvements to reduce operational risk. Mentor junior engineers and contribute to a culture of technical excellence and ownership. ## Related Videos - [Alibaba Big Data and Machine Learning Technology](https://www.wearedevelopers.com/videos/37-alibaba-big-data-and-machine-learning-technology) - [Beyond Kafka & RabbitMQ: Why NATS is the Future of Microservices Messaging](https://www.wearedevelopers.com/videos/1646-beyond-kafka-rabbitmq-why-nats-is-the-future-of-microservices-messaging) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [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) - [Why Systems Break After Initial Success: The Architectural Failures That Take Months to Surface](https://www.wearedevelopers.com/videos/2048-why-systems-break-after-initial-success-the-architectural-failures-that-take-months-to-surface) - [PySpark - Combining Machine Learning & Big Data](https://www.wearedevelopers.com/videos/44-pyspark-combining-machine-learning-big-data) ## Related Articles - [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) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe) - [Why Attend a Developer Event in 2026?](https://www.wearedevelopers.com/magazine/688-why-attend-a-developer-event-in-2026) - [Résumé-Driven Development: How IT trends affect the job market for software developers](https://www.wearedevelopers.com/magazine/59-resume-driven-development-how-it-trends-affect-the-job-market-for-software-developers)