# Lead Software Development Engineer at Mastercard

Mastercard is hiring a Lead Software Development Engineer. Level rates it Little AI ●○○○; you can [apply on Level](https://jobsbylevel.com/go/1b38ed01-4d64-4343-8934-1377901c39d9?utm_medium=ai-agent).

AI Level 1, AI centrality 36 out of 100. O'Fallon, Missouri.

## Details

- Company: [Mastercard](https://jobsbylevel.com/companies/mastercard)
- AI level: AI Level 1 (score 36 out of 100)
- Location: O'Fallon, Missouri
- Posted: October 14, 2026
- Apply: https://jobsbylevel.com/go/1b38ed01-4d64-4343-8934-1377901c39d9?utm_medium=ai-agent

## Description

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 Lead Software Development Engineer Overview Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. 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. We are seeking a highly skilled Lead Software Engineer to drive architecture, design, development, modernization, and operational excellence for mission-critical platforms. This role combines deep technical expertise, hands-on software engineering, architectural leadership, and mentoring to deliver secure, scalable, resilient, and high-performing solutions. Role • 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

The description is cut here. Read the full offer: https://jobsbylevel.com/jobs/lead-software-development-engineer-at-mastercard-df5416

Source: https://jobsbylevel.com/jobs/lead-software-development-engineer-at-mastercard-df5416

## Cite this page

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