Senior Software Engineer, Ops Efficiency

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.

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.

Airwallex's risk platform team is dedicated to safeguarding the company's diverse range of products, including GTPN, PA, Issuing, Onboarding, and Account Takeover. Our responsibility extends to the crucial areas of Know Your Customer (KYC) and Know Your Business (KYB) for customer onboarding. As the risk landscape continuously evolves and fraudsters grow more sophisticated, innovation in risk management becomes paramount. Our team, dispersed across Beijing, Shanghai, and Singapore, collaborates globally with other teams and customers to approach risk management holistically.

Our mission is to ensure Airwallex’s products and services remain safe and secure, positioning us as a trusted partner for businesses worldwide. By leveraging cutting-edge technologies such as graph, Machine Learning (ML), and Language Learning Models (LLM), we continuously refine our risk management strategies. This includes enhancing KYC and KYB processes to streamline onboarding while maintaining robust security protocols.
This role is based in "Singapore".

1. Use Java 8 / Kotlin for the development of payment products and transaction systems in collaboration with the senior technical team.
2. Independently design and develop components within the company's microservice framework.
3. Work directly with product managers and users to understand and fulfill their requirements.
4. Explore new technologies and propose architectural improvements.
5. Mentor newcomers to foster good software engineering practices and coding standards.

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

1. Over 5 years of Core Java development experience and 3+ years in Internet application / large financial system / e-commerce platform development.
2. Bachelor's degree in Computer Science or related fields.
3. Proficient in Java 8, with a strong understanding of Java multi-threading, high concurrency, IO / NIO, and network communication.
4. Well-versed with common design patterns and experienced in designing and developing large-scale distributed systems with high concurrency and high availability.
5. Mastery of various common server technologies to optimize service response and data queries.
6. Familiarity with Microservice Architecture and technologies like Spring / Spring Boot and build tools like Gradle / Maven.
7. Proficient in HTTP, GraphQL, GRPC, REST, JSON, and YAML.
8. Strong communication skills.

1. Experience in international clearing and settlement / foreign exchange transactions.
2. Fluent in English.
3. Familiar with PostgreSQL, Redis, Kafka, Temporal, Kubernetes, CNCF, GitOps, and Cloud platforms (GCP/Aliyun/Databricks).
4. Knowledgeable in Kotlin, Scala, Python, Golang, TypeScript, React, CSS3.
5. Experience with OLAP skill based on BigQuery or Spark
6. Experience with LLM applications.
7. Background in finance/risk management.

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.

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.