# Lead Software Development Engineer **Company**: Mastercard **Location**: O'Fallon, Missouri **Experience**: senior **Job type**: full-time **Salary**: $140,000 - $231,000 USD **Category**: Engineering **Industry**: Technology **Apply**: https://mastercard.wd1.myworkdayjobs.com/en-US/CorporateCareers/job/OFallon-Missouri/Lead-Software-Development-Engineer_R-292929?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply **Canonical**: https://yubhub.co/jobs/job_8a1bb54c-e1b ## Description Mastercard is seeking a highly skilled Lead Software Engineer to drive architecture, design, development, modernization, and operational excellence for mission-critical platforms. The Cyber & Intelligence (C&I) organization is responsible for Mastercard's security and risk-related product development efforts, delivering innovative solutions focused on cybersecurity, authentication, fraud prevention, risk mitigation, and dispute resolution across the global payments ecosystem. **Responsibilities** - Drive the architectural design of software solutions, including dependent services, service interactions, integration patterns, technology standards, and governance practices. - Design and build scalable, resilient, fault-tolerant platforms that meet performance, security, availability, and maintainability requirements. - Lead technical decision-making and architecture reviews across multiple systems and engineering teams. - Act as a hands-on developer and architect, writing high-quality, secure, modular, maintainable, and testable code. - Create, evaluate, test, and deploy innovative technologies that optimize existing products and enable new business opportunities. - Develop and maintain technology roadmaps focused on platform modernization, performance improvements, reliability, and cost optimization. - Contribute across the full software development lifecycle including requirements analysis, design, development, documentation, testing, deployment, and ongoing support. - Design and implement comprehensive testing strategies including unit, functional, integration, regression, and automated testing to ensure solution quality and reliability. - Champion Test-Driven Development (TDD) and Behavior-Driven Development (BDD) practices across engineering teams. - Lead code reviews and enforce engineering standards to ensure code quality, maintainability, security, and consistency with organizational best practices. - Embed secure software development practices throughout the software development lifecycle, including secure design reviews, threat modeling, vulnerability remediation, and adherence to secure coding standards. - Drive performance engineering initiatives through capacity planning, performance testing, system optimization, and scalability improvements. - Own the operational characteristics of delivered solutions, including observability, monitoring, logging, alerting, reliability, maintainability, and recoverability. - Ensure systems are designed for operational excellence by implementing robust monitoring, diagnostics, and support capabilities. - Lead root cause analysis and resolution of complex production issues, driving continuous improvements to platform stability, resiliency, and service availability. - Guide the modernization of legacy platforms using microservices architectures, cloud-native engineering practices, anti-corruption layers, and strangler-pattern approaches. - Collaborate effectively with global engineering, product, operations, and security teams. - Mentor engineers on software architecture, design patterns, engineering practices, coding standards, and emerging technologies. - Serve as a technical leader and ambassador by presenting at internal forums, industry conferences, and engineering communities. **Requirements** - Bachelor's degree in Computer Science, Software Engineering, or a related technical field. - Advanced expertise in software engineering, distributed systems, object-oriented design, algorithms, and data structures. - Strong understanding of software architecture principles, design patterns, domain-driven design, and distributed system design. - Proficiency in one or more modern programming languages such as Java, Scala, Node.js, TypeScript, Angular, or similar technologies. - Demonstrated experience designing and developing enterprise-scale applications and services. - Strong experience with cloud platforms, including IaaS, PaaS, serverless technologies, containerization, and cloud-native architectures. - Experience with microservices, APIs, event-driven architectures, CI/CD pipelines, DevOps practices, and Infrastructure as Code. - Advanced knowledge of secure coding practices, application security concepts, and software risk mitigation techniques. - Experience designing and implementing automated testing frameworks and integration testing strategies. - Strong understanding of observability, monitoring, logging, performance tuning, and operational readiness. - Proven ability to troubleshoot and resolve complex technical issues across application, infrastructure, and integration layers. - Experience designing highly available and resilient systems that can withstand infrastructure and service failures. - Strong analytical, communication, collaboration, and problem-solving skills. - Experience working within Agile development environments. - Demonstrated ability to mentor and influence engineers through technical leadership and coaching. - Passion for continuous learning, innovation, and engineering excellence. **Benefits** - Insurance (including medical, prescription drug, dental, vision, disability, life insurance) - Flexible spending account and health savings account - Paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave) - 80 hours of Paid Sick and Safe Time - 25 days of vacation time and 5 personal days, pro-rated based on date of hire - 10 annual paid U.S. observed holidays - 401k with a best-in-class company match - Deferred compensation for eligible roles - Fitness reimbursement or on-site fitness facilities - Eligibility for tuition reimbursement ## Skills ### Required - software engineering - distributed systems - object-oriented design - algorithms - data structures - cloud platforms - microservices - APIs - event-driven architectures - CI/CD pipelines - DevOps practices - Infrastructure as Code - secure coding practices - application security concepts - software risk mitigation techniques --- Source: [Apply at mastercard.wd1.myworkdayjobs.com](https://mastercard.wd1.myworkdayjobs.com/en-US/CorporateCareers/job/OFallon-Missouri/Lead-Software-Development-Engineer_R-292929?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)