Role Description We are looking for a Platform Software Engineer, DevOps Engineer, or similar roles with the following qualifications: - 5+ years of professional experience in relevant roles. - Advanced English is required. - Successful completion of a four-year college degree is required. - Extensive experience deploying and operating containerized applications using Kubernetes. - Hands-on experience building deployment automation and managing service lifecycles in Kubernetes environments. - Proven experience working with self-hosted open-source platforms and internet-facing services. - Strong background in DNS architecture, authoritative DNS servers, zone delegation, and domain management. - Demonstrated experience configuring email infrastructure, SMTP, mail routing, and email authentication technologies such as SPF, DKIM, and DMARC. - Practical experience developing web scraping, content generation, or data transformation pipelines. - Solid understanding of REST APIs, service orchestration, and distributed systems. - Hands-on experience implementing infrastructure monitoring and observability using Grafana, Prometheus, or similar platforms. - Knowledgeable in cloud platforms such as AWS, Azure, or Google Cloud Platform. - Familiar with CI/CD pipelines and infrastructure automation. - Demonstrated experience building scalable backend services using modern programming languages such as Go, Python, Java, or similar. - Practical experience working with Linux systems, networking, and containerized workloads. - Solid understanding of PKI, TLS certificates, and secure communication protocols. - Experience with cybersecurity, red team infrastructure, cyber ranges, or security simulation platforms is highly desirable. - Ability to work through new and difficult issues and contribute to libraries as needed. - Ability to create and maintain continuous integration and delivery of applications. - Forensic attention to detail. - A positive mindset and a can-do attitude. - Experience working on Agile/Scrum teams. - Meaningful experience working on large, complex systems. - Ability to take extreme ownership over your work. - Ability to identify with the goals of FullStack's clients and dedicate yourself to delivering on the commitments you and your team make to them. Qualifications - 5+ years of professional experience in relevant roles. - Advanced English is required. - Successful completion of a four-year college degree is required. Requirements - Extensive experience deploying and operating containerized applications using Kubernetes. - Hands-on experience building deployment automation and managing service lifecycles in Kubernetes environments. - Proven experience working with self-hosted open-source platforms and internet-facing services. - Strong background in DNS architecture, authoritative DNS servers, zone delegation, and domain management. - Demonstrated experience configuring email infrastructure, SMTP, mail routing, and email authentication technologies such as SPF, DKIM, and DMARC. - Practical experience developing web scraping, content generation, or data transformation pipelines. - Solid understanding of REST APIs, service orchestration, and distributed systems. - Hands-on experience implementing infrastructure monitoring and observability using Grafana, Prometheus, or similar platforms. - Knowledgeable in cloud platforms such as AWS, Azure, or Google Cloud Platform. - Familiar with CI/CD pipelines and infrastructure automation. - Demonstrated experience building scalable backend services using modern programming languages such as Go, Python, Java, or similar. - Practical experience working with Linux systems, networking, and containerized workloads. - Solid understanding of PKI, TLS certificates, and secure communication protocols. - Experience with cybersecurity, red team infrastructure, cyber ranges, or security simulation platforms is highly desirable. - Ability to work through new and difficult issues and contribute to libraries as needed. - Ability to create and maintain continuous integration and delivery of applications. - Forensic attention to detail. - A positive mindset and a can-do attitude. - Experience working on Agile/Scrum teams. - Meaningful experience working on large, complex systems. - Ability to take extreme ownership over your work. - Ability to identify with the goals of FullStack's clients and dedicate yourself to delivering on the commitments you and your team make to them. Benefits - Competitive pay. - 100% remote work. - The ability to work with leading startups and Fortune 500 companies. - Continuing education opportunities. - Opportunity to grow and expand your career.

• Build and evolve core AI platform capabilities • Design and implement shared execution patterns, APIs, and services • Develop reliable, extensible backend systems • Work hands-on across the stack • Collaborate closely with AI engineers, data scientists, product partners, and sales operators

Our Purpose 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. Title and Summary Senior Platform Engineer Overview: As a Senior Platform Engineer (specializing in Communication Server), you will be responsible for maintaining and optimizing our mainframe network infrastructure. You will play a crucial role in ensuring the reliability, security, and efficiency of our z/OS communication environment, including VTAM, TCP/IP, SNA, Sysplex, and related technologies. Role:• Manage and administer z/OS Communication Server components, including VTAM, TCP/IP, SNA, Sysplex Distributor, Parallel Sysplex, and z/OS Cryptographic Services.• Implement and support secure communication protocols including AT-TLS (z/OS Policy Agent-ATTLS), SSL, SFTP, FTPS, and Connect Direct.• Collaborate with application and network teams to integrate z/OS Communication Server technologies with z/OS WebSphere Servers and other middleware solutions.• Utilize z/OS Unix System Services for integrating mainframe applications with distributed environments.• Monitor system performance and implement tuning strategies to optimize network throughput and response times.• Provide expertise and support in mainframe networking technologies and assist in capacity planning and disaster recovery planning.• Subject to On Call, weekend duties, implementation with customers, and all other duties as assigned.• Stay current with industry trends and advancements in mainframe communication technologies to recommend and implement best practices. All About You• Minimum 4+ years of experience as a z/OS Systems Programmer specializing in Communication Server technologies.• Strong inter-personal, written, and oral communication skills.• Ability to effectively work with vendors, internal departments, and management.• Ability to diagnose and resolve problems quickly and completely.• Solid understanding and experience with communications server in a z/OS mainframe environment.• Experience with third party vendor products (IBM, Broadcom) a plus.• Knowledge of and experience with IBM monitoring tools a plus (Netview and NetMaster for File Transfer / TCP/IP). • Ability to install, support and diagnose third party software.• Strong programming skills in JCL, REXX, and other programming languages a plus. Corporate Security Responsibility 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.

• Collaborate on key areas of the Developer Platform contributing to technical implementation alongside the team. • Help improve the speed, reliability, and developer experience of the monorepo CI/CD pipeline so engineers spend more time shipping and less time waiting on or debugging builds. • Help productionize the Agentic AI platform: agent observability, RAG, and the context-engineering patterns that keep agents reliable from dev through prod. • Partner with the team to consolidate fragmented build systems and deliver standardized “paved road” blueprints so new products can onboard and ship to production quickly. • Partner with engineers across the company to identify toil, codify patterns, and automate repetitive manual work. • Participate in design and code reviews, and contribute your technical voice to engineering velocity and operational excellence.