Design, develop, and maintain scalable big data solutions while identifying improvement opportunities. Collaborate with teams to define APIs and ensure high-quality documentation, contributing to a sustainable big data platform.

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 - Architecture Who is Mastercard? Mastercard is a global technology company specializing in the payments industry. Our mission is to connect and empower an inclusive, digital economy that benefits everyone, everywhere by ensuring transactions are safe, simple, smart, and accessible. Utilizing secure data and networks, strategic partnerships, and passion, our innovations and solutions support individuals, financial institutions, governments, and businesses in realizing their greatest potential. Our decency quotient, or DQ, drives our culture and influences everything we do both within and outside of our company. With connections spanning more than 210 countries and territories, we are committed to building a sustainable world that unlocks priceless possibilities for all. Overview The Virtual Card Management team are seeking a visionary and results-driven Principal Software Engineer (Architecture) to lead architecture for a service group in our critical virtual card platform for Corporate Solutions. This role is pivotal in driving engineering excellence, scaling delivery capabilities, and fostering a culture of innovation, accountability, and continuous improvement. You will be responsible for aligning architecture and engineering strategy with business goals, mentoring high-performing teams, and ensuring the successful delivery of complex software solutions.The Virtual Card Management group is responsible for designing, building, and operating the technology that powers Mastercard's next-generation virtual card management platform. In this role, you will design and build software that scales to global markets, enabling secure, seamless, always available virtual card platform. This is an exciting engineering leadership role working with a global team passionate about the solutions we deliver to our customers. Role In this role, you will drive collaboration across engineering, product management, enterprise functions, and regional business teams. You will also lead by defining the technical strategy, architecture, design, and execution to iteratively achieve outcomes. As a principal software engineer, you will: Drive business outcomes with the right technology solutions - Lead the architecture & design of software systems and applications. - Collaborate with product teams to understand the requirements, identify solutions, and provide technical thought leadership. - Have experience implementing Domain Driven Design methodology. - Ensure solutions meet corporate security standards and adhere to operability principles. -Drive a culture of engineering excellence - Leading software development projects, especially at an early stage (PoC, Pilot). - You have working experience across a variety of languages and frameworks. - You love declarative paradigm and functional programming. You focus on continuous improvement. - Your solutions are secure by design. - You build great relationships with technical peers across your organization Skills - Broad experience as a Software Engineer / Full Stack Developer. - Hands on experience implementing design patterns and using multiple programming languages. - Experience building and operating scalable global platforms with high throughput with 5 9's availability. - In depth knowledge of Java, Spring framework, persistence and messaging technologies, and testing methodologies and tools. - In depth knowledge of Public Cloud platforms, containers and container orchestration. - Good working knowledge of cryptography functions and PKI infrastructure. All About You - 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 and organizational skills. - Drives outcomes through strong commitment to timely delivery of key objectives. - Have strong decision-making skills, lead retrospection and continually improve as a result. - Must have expert level knowledge of software development processes and be an experienced user of one or more Application Lifecycle Management tools. Corporate Security Responsibility All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must: Abide by Mastercard's security policies and practices; Ensure the confidentiality and integrity of the information being accessed; Report any suspected information security violation or breach, and Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines. Corporate Security Responsibility All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must: - Abide by Mastercard's security policies and practices; - Ensure the confidentiality and integrity of the information being accessed; - Report any suspected information security violation or breach, and - Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.

• Define and lead the long-term technical architecture of the platform • Lead backend architecture and infrastructure strategy using Rust-based systems • Help build scalable systems supporting feeds, messaging, live updates, video, and data infrastructure • Oversee engineering direction across backend, frontend, infrastructure, and product systems • Partner closely with leadership on product and company strategy • Establish engineering culture, hiring standards, and technical execution processes • Work directly with engineers on architecture reviews, tradeoffs, and implementation decisions • Help design future financial infrastructure including rewards, wallets, payments, and crypto-related systems • Support AI-powered systems including translation, recommendation, search, and football history infrastructure • Ensure scalability, reliability, performance, and security across all systems

About Airwallex Airwallex is the only unified payments and financial platform for global businesses. Powered by our unique combination of proprietary infrastructure and software, we empower over 200,000 businesses worldwide - including Brex, Rippling, Navan, Qantas, SHEIN and many more - with fully integrated solutions to manage everything from business accounts, payments, spend management and treasury, to embedded finance at a global scale. Proudly founded in Melbourne, we have a team of over 2,200 of the brightest and most innovative people in tech across 26 offices around the globe. Valued at US$8 billion and backed by world-leading investors including T. Rowe Price, Visa, Mastercard, Robinhood Ventures, Sequoia, Salesforce Ventures, DST Global, and Lone Pine Capital, Airwallex is leading the charge in building the global payments and financial platform of the future. If you're ready to do the most ambitious work of your career, join us. Attributes We Value We hire successful builders with founder-like energy who want real impact, accelerated learning, and true ownership. You bring strong role-related expertise and sharp thinking, and you're motivated by our mission and operating principles. You move fast with good judgment, dig deep with curiosity, and make decisions from first principles, balancing speed and rigor. You're humble and collaborative; turn zero-to-one ideas into real products, and you "get stuff done" end-to-end. You use AI to work smarter and solve problems faster. Here, you'll tackle complex, high-visibility problems with exceptional teammates and grow your career as we build the future of global banking. If that sounds like you, let's build what's next. About the team The Financial Markets team powers the core FX and liquidity technology at Airwallex. Within this team, our liquidity platform ensures that funds are always in the right place at the right time, optimising flows, enabling seamless internal transfers across currencies, and supporting global business needs. From forecasting liquidity requirements to solving complex scaling challenges, we build data-driven, precise solutions that keep Airwallex running at speed. We're now looking for a talented, driven engineer to join the FX Platform team and help deliver on this vision. What you'll do You are an experienced backend engineer who is comfortable working in complex domains like financial markets, payments or other high-integrity distributed systems. You care deeply about correctness, simplicity and operability, and you're happy to engage with product and non-technical stakeholders on trade-offs. You're pragmatic: you can balance ideal architectures with the realities of delivery, and you're comfortable iterating on systems that are already in production. This role is based in Melbourne. Responsibilities: - Design, build and own backend services for FX pricing, execution and risk management, with a focus on performance, correctness and reliability. - Contribute to the evolution of our FX platform architecture (microservices, event-driven workflows, Kafka, gRPC, SQL/NoSQL datastores), keeping latency low and throughput high. - Implement and maintain robust controls for pricing, limits, risk, reconciliation and monitoring, ensuring our systems behave predictably under stress and failure scenarios. - Work end-to-end on features: from requirements and solution design, to implementation, automated testing, deployment and operational runbooks. - Collaborate with Product, Treasury, Risk, Data and other engineering teams to design APIs and data contracts that are easy to use, observable and backward compatible. - Instrument services with metrics, logs and tracing, and use these to drive capacity planning, performance optimisation and incident resolution. - Participate in code reviews, technical design discussions and knowledge-sharing sessions; mentor less-experienced engineers where appropriate. - Take part in our on-call rotation (with strong observability, runbooks and support from the team) to ensure the FX platform remains reliable and highly available. Who you are We're looking for people who meet the minimum qualifications for this role. The preferred qualifications are great to have, but are not mandatory. Minimum qualifications: - 5+ years of experience building and operating backend systems in production. - Strong programming experience in one or more JVM languages (e.g. Kotlin, Java) or a comparable backend stack, and a willingness to work primarily in the JVM ecosystem. - Solid understanding of distributed systems fundamentals: concurrency, data consistency, idempotency, retries, backoff, and failure modes in networked services. - Experience designing and working with REST and/or gRPC APIs, and persistence layers using relational databases (e.g. PostgreSQL) and/or key-value stores. - Proficiency with event-driven architectures and message brokers/streams (e.g. Kafka or similar). - Strong focus on testing and quality: unit, integration and contract tests; familiarity with CI/CD pipelines. - Good grasp of observability: metrics, logging, tracing and alerting, and how to use them to debug production issues. - Clear written and verbal communication skills; comfortable working with cross-functional partners in a fast-paced environment. Preferred qualifications: - Experience in financial services, FX pricing, execution or risk management #Melbourne Applicant Safety Policy: Fraud and Third-Party Recruiters To protect you from recruitment scams, please be aware that Airwallex will not ask for bank details, sensitive ID numbers (i.e. passport), or any form of payment during the application or interview process. All official communication will come from an @airwallex.com email address. Please apply only through careers.airwallex.com or our official LinkedIn page. Airwallex does not accept unsolicited resumes from search firms/recruiters. Airwallex will not pay any fees to search firms/recruiters if a candidate is submitted by a search firm/recruiter unless an agreement has been entered into with respect to specific open position(s). Search firms/recruiters submitting resumes to Airwallex on an unsolicited basis shall be deemed to accept this condition, regardless of any other provision to the contrary. Equal opportunity Airwallex is proud to be an equal opportunity employer. We value diversity and anyone seeking employment at Airwallex is considered based on merit, qualifications, competence and talent. We don't regard color, religion, race, national origin, sexual orientation, ancestry, citizenship, sex, marital or family status, disability, gender, or any other legally protected status when making our hiring decisions. If you have a disability or special need that requires accommodation, please let us know.