Principal Software Engineer

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 Principal Software Engineer 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 Switching Gateway provides a single payment connection that supports Mastercard and non-Mastercard branded financial transactions.  It is a streamlined interface that enables transaction originators and receivers (e.g., merchants, financial institutions, and processors) to connect to other players in the payment ecosystem. Our team of integrators, analysts, testers and subject matter experts work together to build four platforms that encompasses full lifecycle of payment processing. We are looking for a Lead Product Manager-Technical to drive our customer experience strategy forward by consistently innovating and problem-solving. We are looking for An engineer who can whiteboard a globally distributed architecture, dive into JVM internals, explain TCP retransmissions, optimize database access patterns, troubleshoot complex production performance issues, and still write production-quality Java code. Someone who is deeply passionate about software engineering, innovation, and technology craftsmanship, thrives on solving the hardest scalability and distributed systems challenges, and influences the technical direction. Required Experience  Designed and developed highly available, fault-tolerant, and geographically distributed systems. Solved complex consistency, replication, concurrency, caching, and data partitioning challenges. Designed and developed systems capable of operating at massive scale with near-zero downtime. Driven an architecture review for critical applications and infrastructure platforms. Led capacity planning, performance engineering, and resiliency initiatives. Demonstrated mastery across the technology stack     -Programming Language Java (preferred)/Go     -Layer 7 protocols (HTTP/REST/gRPC/API Gateway)    -Messaging systems (Kafka, Pulsar, RabbitMQ, Solace)    -Kubernetes , Service Mesh and Microservices    -Databases (SQL/NoSQL/NewSQL/Datawarehouse)    -Operating Systems    -Networking (TCP/IP, DNS, Load Balancing)    -Storage Systems    -Compute, Memory and I/O subsystems Understand system behaviour from application requests through network, storage, and hardware layers. Role Lead architecture and design of large-scale distributed systems serving millions and billions of transactions. Design and build shared common reusable libraries and components. Drive engineering decisions across multiple products, services, and business domains. Define long-term technology strategy, architecture standards, and platform roadmaps. Evaluate trade-offs across scalability, resiliency, performance, securi