Senior Software Engineer, Notification

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 150,000 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 1,800 of the brightest and most innovative people in tech across 26 offices around the globe. Valued at US$6.2 billion and backed by world-leading investors including Visa, Airtree, Blackbird, Sequoia, DST Global, Greenoaks, Salesforce Ventures, Lone Pine, and Square Peg, 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.

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.

As a vital member of the Tech Platform Team, you will be part of a specialized force that meticulously bridges the gap between business exigencies and architectural finesse. You will engage in:

• A cloud native Platform with cutting-edge technologies such as reactive programming, temporal, workflow, distributed systems, and advanced gateway solutions

• An I/O intensive and mission critical system serving the entire organization requiring high craftsmanship, discipline and continuous innovative mindset

• Comprehensive, organization-wide evaluations of strategic solutions.

• Design, develop & maintain a resilient, high-throughput, low-latency Notification Platform to deliver messages (SMS, Email, Push) to our customers worldwide.

• Maintain a high architecture standard & craftsmanship through an Event Driven Architecture requiring high scalability, traceability & automation

• Identify new opportunities to engage adopters through delightful adoption experience and extension over various channels, such as WhatsApp and inbox notifications.

• Engage with Product, Engineering, and Design teams across Airwallex's global offices, fostering effective communication through fast pace business transformation & providing data insights.

• Troubleshoot production issues across different levels of the stack.

• You’ll join a highly efficient team that operates Scheduled workflow, Search & Gateway

We're looking for people who meet the minimum qualifications for this role. The preferred qualifications are great to have, but are not mandatory.

• More than 5 years of back-end development experience; Have experience in developing large-scale systems.

• Bachelor degree or above in computer science or engineering related majors.

• Proficient in coding and scripting languages (Java(Kotlin) /C++ /Python, etc.) with strong software design and system design abilities.

• At least 3 years of experience building distributed search systems using middleware (like Kafka, PostgreSQL or Elastic Search) and have hands on experience on managing, maintaining and tuning event pipeline

• Familiar with at least one : Java memory management, multi-threading, high concurrency, IO / NIO, network communication, etc.

• Wider interest beyond backend technologies, including design systems, search & AI technologies, gateway technologies and data analytics.

• Focus on automating tasks to concentrate on high-impact activities and are proactive in reducing technical debt.

• Experience with distributed databases or storage systems like PostgreSQL /Redis /NoSQL.

• Proficient in messaging patterns and resilience.

• Hands-on knowledge with full implementation of Kafka.

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.

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. If you are approached by someone claiming to represent Airwallex, please verify with our team.