Senior/Staff Software Engineer (Backend), Growth

Airwallex•San Francisco, CA

11h

About The Position

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 2,000 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. Locations: San Francisco, US The Opportunity: Be Part of Our Growth Team Our Growth Team sits at the heart of Airwallex’s mission, focusing on user acquisition and strategic market expansion. We leverage data and cutting-edge technologies to craft seamless, intuitive experiences that help millions of users discover, engage with, and benefit from our products. From new-user funnels to onboarding optimizations, our Growth team is all about experimentation, rapid iteration, and driving sustainable business impact. Whether it’s designing scalable architectures for high-traffic pages, building robust A/B testing frameworks, or integrating global marketing platforms, the Growth team’s contributions directly shape how we attract and retain customers worldwide. Joining the Growth team means you’ll have a front-row seat to the most crucial stage of our product lifecycle and play a pivotal role in fueling the next wave of our global expansion.

Requirements

Bachelor degree or above in computer science or engineering related majors.
5+ years of experience in modern engineering practices focused on continuous integration and quality engineering.
Strong computer science fundamentals, solid understanding of OOP concepts.
Experience domain driven design and event driven architectures.
Deep working experience with high throughput / low latency / high available distributed systems.
Cloud experience with GCP (preferred) or AWS (EC2, RDS, ELB, CloudFront, etc.) with Docker and Kubernetes.
Familiarity with observability tooling such as Splunk, Grafana, and Prometheus.

Nice To Haves

Experience with JVM based programming Java or Kotlin, familiar with Spring/Spring Boot
Experience solving GTM operations end-to-end
Knowledge of data warehousing, customer segmentation, and analytics tools
Familiarity with building internal or customer-facing products with AI & LLMs

Responsibilities

Design and Build Scalable Systems
Architect, develop, and maintain microservices in Java/Kotlin (or similar languages), ensuring our high-traffic, high-availability systems meet global user demands.
Implement best practices for service-to-service communication, orchestration, and fault tolerance.
Enable Data-Driven Decisions
Collaborate with data scientists and product managers to design data pipelines, analytics platforms, and event-driven architectures.
Ensure the data powering our Growth initiatives is accurate, reliable, and easily accessible.
Collaborate and Innovate
Work closely with cross-functional teams—Frontend, Product, Design, and Marketing—to translate business requirements into scalable backend solutions.
Participate in architectural reviews, code reviews, and strategy sessions to continually elevate the quality and performance of our backend services.
Experiment and Iterate
Develop services that support rapid A/B testing, feature toggles, and real-time performance monitoring.
Continuously improve backend functionalities to reduce friction, increase user engagement, and drive conversions.
Promote Security & Compliance
Integrate secure coding practices and frameworks to protect user data and maintain global regulatory compliance.
Identify potential vulnerabilities, ensure robust authentication and authorization mechanisms, and proactively address security risks.