Senior Software Engineer - Growth

About Airwallex

Airwallex is the AI-native financial operating system for a real-time, intelligent economy. More than 676,000 businesses, including McLaren Racing, Qantas, SHEIN, and TikTok, use us, directly or through our platform partners, to run their financial operations or build and monetize financial products of their own.

We started in Melbourne in 2015 to build the infrastructure global commerce runs on. We're the regulated backbone behind global payments: not by accident, but by design. A decade plus, 85+ licenses, and a financial infrastructure spanning North America, Europe, the Middle East, and Asia-Pacific.

We're co-headquartered in San Francisco and Singapore, with more than 2,300 people across 27 offices. We hire builders with founder-level energy, people who move fast with good judgment, dig in with real curiosity, and make calls from first principles rather than waiting to be told what to do. Read our operating principles to see it in full.

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.

Minimum qualifications:

• Bachelor’s 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 and understanding of OOP concepts

• Experience with domain driven design and event driven architectures

• Deep experience with high throughput/low latency/high availability distributed systems

• Cloud experience with GCP (preferred) or AWS (EC2, RDS, ELB, CloudFront, etc.), and familiarity with Docker and Kubernetes

• Familiarity with observability tooling such as Splunk, Grafana, and Prometheus

Preferred qualifications:

• Experience with JVM-based programming in Java or Kotlin; familiarity 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 using AI and LLMs

Personal attributes:

• Technically proficient with robust expertise in Java/Kotlin and backend development

• Empathetic, customer-focused problem solver

• Data-driven, with strong analytical skills

• Collaborative, knowledge-sharing team player and mentor

• Adaptable, continuously learning, and quick to embrace new technologies

• Self-motivated, demonstrates strong ownership and proactive leadership

• Effective prioritizer, able to balance workload and maintain high quality standards

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.