" \u003cdiv class=\"ja-job-details\"\u003e \u003ch2 class=\"title\"\u003ePrincipal Engineer (Java) - Real-Time payments platform\u003c/h2\u003e \u003cdiv class=\"meta\"\u003e \u003cul class=\"classifications\"\u003e \u003cli data-id=\"11263\"\u003e Development \u0026amp; Programming \u003c/li\u003e \u003cli data-id=\"11265\"\u003e Sydney \u003c/li\u003e \u003cli data-id=\"11266\"\u003e Permanent \u003c/li\u003e \u003c/ul\u003e \u003cp class=\"date-posted\"\u003e 22/10/2026 \u003c/p\u003e \u003c/div\u003e \u003cdiv class=\"description\"\u003e We\u0027re building a modern, cloud-native Payments Platform that powers mission-critical financial transactions at scale. This platform processes millions of payment and card transactions with a relentless focus on reliability, resilience, and operational excellence.\u003cbr\u003e \u003cbr\u003eWe\u0027re looking for an experienced \u003cstrong\u003ePrincipal Engineer\u003c/strong\u003e to provide technical leadership across our Payments domain. This is our highest individual contributor engineering role, designed for engineers who combine exceptional technical depth with the ability to influence architecture, mentor senior engineers, and drive engineering excellence across a large organisation.\u003cbr\u003e If you\u0027re passionate about distributed systems, large-scale platform engineering, and building technology that underpins critical financial services, we\u0027d love to hear from you.\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eAbout the Role\u003c/strong\u003e \u003cbr\u003eAs Principal Engineer, you will be the technical authority for the Payments Platform, shaping its architecture and engineering strategy while remaining hands-on with complex technical challenges. You\u0027ll work across multiple engineering teams to establish technical direction, improve platform reliability, and enable teams to deliver high-quality software at scale.\u003cbr\u003e Success in this role comes from amplifying the effectiveness of others. You\u0027ll mentor senior engineers, influence architectural decisions across organisational boundaries, and help build a culture of technical excellence, operational maturity, and continuous learning.\u003cbr\u003e \u003cbr\u003eThis role combines deep software engineering expertise with strategic architectural leadership, requiring someone equally comfortable designing complex distributed systems, responding to production incidents, and communicating technical strategy with engineering and business leaders.\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eWhat You\u0027ll Do\u003c/strong\u003e \u003cul\u003e \u003cli\u003eDefine and evolve the technical vision and architecture for a large-scale Payments Platform.\u003c/li\u003e \u003cli\u003eLead the design and delivery of highly available, scalable, and resilient distributed systems.\u003c/li\u003e \u003cli\u003eAct as the primary technical authority for the Payments domain.\u003c/li\u003e \u003cli\u003eDrive architectural consistency and engineering standards across multiple teams.\u003c/li\u003e \u003cli\u003eProvide technical leadership during major incidents and critical production events.\u003c/li\u003e \u003cli\u003eMentor senior engineers and develop engineering capability across the organisation.\u003c/li\u003e \u003cli\u003eInfluence technical decisions through collaboration, coaching, and technical credibility.\u003c/li\u003e \u003cli\u003ePartner with engineering leaders, architects, and product stakeholders to balance business outcomes with technical excellence.\u003c/li\u003e \u003cli\u003eChampion reliability engineering, observability, automation, and operational excellence.\u003c/li\u003e \u003cli\u003eContribute directly to complex engineering challenges through hands-on development and technical problem solving.\u003c/li\u003e \u003c/ul\u003e \u003cstrong\u003eWhat You\u0027ll Bring\u0026nbsp;\u003c/strong\u003e \u003cul\u003e \u003cli\u003eExtensive experience designing and operating large-scale distributed systems.\u003c/li\u003e \u003cli\u003eExpert-level hands-on experience with Java and Spring Boot.\u003c/li\u003e \u003cli\u003eStrong knowledge of cloud-native platforms, including AWS and/or Google Cloud Platform.\u003c/li\u003e \u003cli\u003eDeep understanding of microservices, event-driven architecture, messaging systems, and integration patterns.\u003c/li\u003e \u003cli\u003eExperience building highly available, high-throughput, low-latency platforms.\u003c/li\u003e \u003cli\u003eStrong knowledge of DevOps practices, CI/CD, infrastructure automation, and platform engineering.\u003c/li\u003e \u003cli\u003eExpertise in system reliability, resilience, observability, and incident management.\u003c/li\u003e \u003cli\u003eStrong understanding of secure software engineering practices for financial systems.\u003c/li\u003e \u003cli\u003eExperience using AI-assisted software development, including modern coding assistants and spec-driven development workflows.\u003c/li\u003e \u003c/ul\u003e \u003cstrong\u003eDomain Experience:\u003c/strong\u003e We\u0027re particularly interested in candidates with experience in one or more of the following:\u003cbr\u003e \u003cul\u003e \u003cli\u003ePayment processing\u003c/li\u003e \u003cli\u003eCard issuing or acquiring\u003c/li\u003e \u003cli\u003eTransaction processing\u003c/li\u003e \u003cli\u003eBanking platforms\u003c/li\u003e \u003cli\u003eFinancial services\u003c/li\u003e \u003cli\u003eOther highly regulated, mission-critical environments\u003c/li\u003e \u003c/ul\u003e \u003cstrong\u003eLeadership Qualities:\u003c/strong\u003e You\u0027ll thrive in this role if you:\u003cbr\u003e \u003cul\u003e \u003cli\u003eLead through technical expertise rather than organisational authority.\u003c/li\u003e \u003cli\u003eBuild trust and influence across multiple engineering teams.\u003c/li\u003e \u003cli\u003eMentor and coach experienced engineers.\u003c/li\u003e \u003cli\u003eStay calm and decisive during high-pressure production incidents.\u003c/li\u003e \u003cli\u003eCommunicate complex technical concepts clearly to both technical and non-technical stakeholders.\u003c/li\u003e \u003cli\u003eBalance strategic thinking with hands-on engineering.\u003c/li\u003e \u003cli\u003eFocus on multiplying the impact of those around you rather than individual output alone.\u003c/li\u003e \u003c/ul\u003e \u003cstrong\u003eWhy Join Us?\u003c/strong\u003e \u003cbr\u003e\u003cbr\u003eYou\u0027ll help shape the next generation of a modern Payments Platform while working alongside highly capable engineers who value autonomy, craftsmanship, and continuous improvement.\u003cbr\u003e This is an opportunity to influence technology at enterprise scale, solve complex engineering challenges, and play a defining role in the evolution of a platform that powers critical financial services every day. \u003c/div\u003e \u003cdiv class=\"apply\"\u003e \u003ca class=\"back-link\" href=\"#\" title=\"Back to search results\"\u003eBack to search results\u003c/a\u003e \u003cinput type=\"button\" class=\"ja-button\" data-job-id=\"4480535\" value=\"Apply Now\" title=\"Apply Now\" /\u003e \u003c/div\u003e \u003c/div\u003e "