Senior Software Architect & AI-Driven Systems Lead

Mastercard; O’Fallon (MO); On-site; USD 140,000 - 231,000; Full time

Benefits offered by this job

Medical Insurance

401(k) Match

Paid Leave

Vacation Time

Job summary

Mastercard is seeking a Lead Software Development Engineer to drive architecture, engineering strategy, and delivery for our next‑generation payment platforms. You will lead across teams to establish standards, governance, and secure coding practices while guiding AI‑powered engineering initiatives.

You will mentor engineers, own performance and observability, and design fault‑tolerant, low-latency systems capable of processing millions of transactions daily in a modern cloud ecosystem.

Qualifications

• 10+ years of software engineering experience.
• 3+ years leading large-scale distributed system initiatives.
• Expert-level Java, Spring Boot, REST APIs, microservices architecture, and distributed systems expertise.
• Strong software architecture and software design leadership experience.
• Deep expertise in performance engineering and reliability engineering.
• Extensive experience implementing secure coding standards and software quality practices.
• Experience mentoring engineers and leading technical decision-making.
• Deep understanding of observability, monitoring, operability, and production support.
• Demonstrated experience with AI-assisted software development, AI agents, MCP, RAG, and agentic workflows.
• Strong communication, stakeholder management, and technical leadership skills.

Responsibilities

• Lead software design and architecture decisions across multiple teams and platforms.
• Define engineering standards for software development, testing, security, operability, and deployment.
• Mentor engineers and cultivate a culture of engineering excellence.
• Architect highly available, fault-tolerant distributed systems capable of processing millions of transactions daily.
• Lead development and deployment using PCF, Kubernetes, Docker, and CI/CD platforms.
• Establish secure coding standards and application security best practices.
• Drive operational readiness, observability, monitoring, and supportability strategies.
• Lead complex troubleshooting efforts, root cause analysis, and remediation activities.
• Lead adoption of AI-assisted development, AI agents, MCP-based integrations, autonomous workflows, and modern engineering productivity tools.

Skills

Java

Spring Boot

REST APIs

Microservices

Distributed systems

Software architecture

Performance engineering

Observability

Secure coding

Technical leadership

Mentoring

AI-assisted development

Tools

Kubernetes

Docker

CI/CD

Kafka

Job description

Mastercard is seeking a Lead Software Development Engineer to drive architecture, engineering strategy, and delivery for our next‑generation payment platforms. You will lead across teams to establish standards, governance, and secure coding practices while guiding AI‑powered engineering initiatives.

You will mentor engineers, own performance and observability, and design fault‑tolerant, low-latency systems capable of processing millions of transactions daily in a modern cloud ecosystem.