Senior Software Engineer Backend, Billing

Responsibilities

• Lead the planning, design, and implementation of the Airwallex engineering system
• Partner with business and product teams to conduct system analysis and architecture design for complex billing scenarios
• Design and develop scalable components based on the company’s microservice framework
• Introduce innovative technologies and solutions to the engineering team
• Drive the construction and management of the technical team while establishing high-quality internal coding standards

Requirements

• 6+ years of Core Java development experience
• 5+ years of experience in Internet applications, large financial systems, or e-commerce platforms
• 1+ year of experience in payment platform development
• Bachelor's degree in Computer Science or a related field
• Proficiency in Java 8, including multi-threading, high concurrency, and IO/NIO
• Experience designing and developing large-scale distributed, high-concurrency, and high-availability systems
• Strong understanding of common design patterns and server technologies to optimize service response and data queries

Preferred Qualifications

• Experience with international clearing, settlement, or foreign exchange transactions
• Proficiency in Kotlin, Scala, Python, Golang, or R
• Experience with NoSQL databases such as Cassandra, Redis, or Hadoop
• Familiarity with containerization and orchestration tools like Docker Swarm or Kubernetes
• Experience with cloud platforms such as AWS or Aliyun Cloud
• Fluency in English

About the Company

Airwallex is a unified payments and financial platform for global businesses. Powered by proprietary infrastructure and software, we empower over 200,000 businesses worldwide—including Brex, Rippling, and Qantas—to manage business accounts, payments, spend management, and treasury at a global scale. Valued at US$8 billion, Airwallex is building the future of global banking with a team of over 2,200 innovators across 26 offices globally.