Mastercard · 1 week ago
Lead Software Engineer (Networks Security)
O'Fallon, MO
Full-time
Hybrid
Senior Level, Lead/Staff
$140K/yr - $231K/yrMastercard powers economies and empowers people in 200+ countries and territories worldwide. The Lead Software Engineer for Network Security Architecture will design and build secure, scalable, automated network security platforms and services, ensuring best in class performance, reliability, and security across Mastercard’s global network.
FinanceFinancial ServicesInformation TechnologyPayments
Responsibilities
Define, design, and evolve network security services, automation frameworks, and platform capabilities at scale
Develop service-level procedures, reusable patterns, and engineering solutions aligned to architectural standards and business needs
Introduce new technologies in alignment with enterprise guidelines and evaluate emerging capabilities that enhance automation, security, or reliability
Partner with Network Architecture teams to ensure secure by design integration across data centers, cloud environments, and hybrid infrastructure
Write high-quality, maintainable code to enhance network security tools and automation services
Build API-driven integrations across multivendor environments using Python, ensuring consistency, compliance, and operational efficiency
Automate and simplify processes, actively advocating for an automation first culture across the organization
Develop and maintain high-quality documentation for architecture, design, operations, and platform standards
Qualification
Required
Degree in Computer Science, Software Engineering, Infrastructure Technologies, or related field—or equivalent experience
Advanced proficiency in modern languages such as Go and Python, API integrations, and software-driven automation in multivendor environments
Advanced understanding of networking and network security fundamentals, including TCP/IP, routing, switching, subnets, SDN, and network segmentation
Strong grasp of modern software development methodologies: Git, CI/CD pipelines, testing frameworks, branching strategies, pull requests, and DevOps practices
Experience designing large-scale, platform-level services in global, distributed environments
Demonstrated leadership in technical direction, guiding engineering teams, and executing complex initiatives
Excellent analytical and problem-solving skills, with the ability to exercise sound technical judgment
Strong communication skills with the ability to collaborate effectively across all levels of the organization
Self-motivated, organized, and capable of driving work forward with minimal supervision
Comfortable adapting to new technologies, evolving architectural direction, and emerging automation patterns
You want to work on an awesome team!
Preferred
Experience with Ansible, Terraform, or Chef for infrastructure automation and orchestration
Familiarity with infrastructure-as-code workflows and GitOps methodologies
Exposure to cloud networking and security constructs across AWS, Azure, or GCP
Experience with network security platforms, policy automation, compliance tooling, or large-scale inventory systems
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
Company
Mastercard
Mastercard is a financial network that processes payments between banks and cardholders.
Founded in 1966
10001+ employees
H1B Sponsorship
Mastercard has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (540)
2024 (319)
Funding
Current Stage
Public CompanyTotal Funding
unknown2006-05-25IPO
Leadership Team
Michael Miebach
Chief Executive Officer
Ed McLaughlin
President & Chief Technology Officer
Recent News
2026-02-04
The Fintech Times
2026-02-03
2026-02-03
Company data provided by crunchbase