Lead Software Engineer
MastercardO'Fallon, MissouriPosted 22 March 2026
Job 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 Engineer Who is Mastercard? 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. Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial institutions, governments, and businesses realize their greatest potential. Our decency quotient, or DQ, drives our culture and everything we do inside and outside of our company. With connections across more than 210 countries and territories, we are building a sustainable world that unlocks priceless possibilities for all. Overview The Business Rules Engineering & Strategy team is looking for a Lead Software Engineer to drive forth our mission of building robust IBM ODM Rule solutions that provide transaction level decisioning, alerting and notifications. Business Rules embed intelligence into the transactional cycle by leveraging scoring models, cohesive rule strategies and behavioral data, and when combined with our agile rule development & deployment capabilities, results in a competitive advantage for all stakeholders, in the entire payment ecosystem. Role • Lead Rule Architect/Developer who will be responsible for producing fraud decision management technology solutions in support of multiple business units. • Collaborate, influence and work with cross functional teams to understand the requirements, identify solutions and provide technical thought leadership • Ensure project implementation(s) are compliant with solution architectural design, established architectural patterns (where applicable), policies, standards, and best practices • Ensure that solution architectural designs are aligned with business needs, infrastructure capabilities, and security & compliance requirements • Drive a culture of engineering excellence - Leading software development projects, especially at an early stage (PoC, Pilot) • Assist with project scoping, sizing, prioritizing, planning, and estimation • Mentor development team on industry best practices • Familiarity with AI technologies like Gen AI, LLMs relevant to Fraud Rules • Hands on experience implementing design patterns and using multiple programming languages. • Experience building and operating scalable global platforms with high throughput, low latency with 5 9’s availability All About You • Minimum bachelor’s degree in information technology, Computer Science or extensive work experience. • Hands-on Rule strategy development experience. • Hands-on Software development experience. 8+ years in Software and micro-services architecture. Familiar with dev ops and IT Operations best practices. • Strategic Leader who has expertise with Fraud Rule Engines and proven experience in large-scale migrations • Be a bar raiser with working experience across a variety of languages and frameworks, love declarative paradigm and functional programming • Hands-on technical leader who consistently demonstrates leadership, builds trust, focuses on talent development and inspires the team. • Must be high-energy, detail-oriented and proactive with the ability to function under pressure in an independent environment. • Have a passion for continuous learning and enjoy challenging opportunities. • Strong communication skills – both verbal and written – with strong relationship building, collaborative skills a ... (truncated, view full listing at source)
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