Senior Software Engineer - Growth

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 250,000 businesses worldwide – including Brex, 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 2,300 of the brightest and most innovative people in tech across 27 offices around the globe. Valued at US$11 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

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.

What you’ll do

As a Backend Engineer within the Growth team, you will architect, develop, and maintain scalable microservices and backend systems powering our growth initiatives. You will enable experimentation and data-driven decision-making, collaborate closely with cross-functional teams, and drive robust, secure, and high-performing technical solutions that support our global user acquisition and engagement strategies.

This role is based in San Francisco.

Responsibilities:

Architect, develop, and maintain microservices in Java/Kotlin (or similar languages), ensuring high-traffic, high-availability systems meet global user demands.

Implement best practices for service-to-service communication, orchestration, and fault tolerance.

Collaborate with data scientists and product managers to design data pipelines, analytics platforms, and event-driven architectures.

Ensure Growth data is accurate, reliable, and easily accessible for key decisions.

Translate business requirements into scalable backend solutions by working closely with Frontend, Product, Design, and Marketing teams.

Participate in architectural reviews, code reviews, and strategy sessions to continually improve backend service quality and performance.

Develop services that support rapid A/B testing, feature toggles, and real-time performance monitoring; continuously improve backend functionalities to enhance user engagement and drive conversions.

Integrate secure coding practices and frameworks to protect user data and ensure global regulatory compliance. Proactively address potential vulnerabilities and security risks.

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.