Billing Platform Backend Engineer – Lead & Innovate

Airwallex; Singapore; Hybrid; SGD 120,000 - 180,000; Full time

Job summary

Airwallex in Singapore/Shanghai is seeking a senior backend engineer to help build and scale our next-gen billing platform. You will design, develop and integrate core pricing, billing and invoicing capabilities with a microservice architecture.

The role emphasizes Java 8, high-concurrency systems and modern cloud tooling. You’ll collaborate with product, data, and engineering teams across borders to deliver reliable, scalable solutions for global customers.

Qualifications

• Over 3 years of Core Java development and 3+ years in internet/large financial system/e-commerce platform development.
• Over 1 year experience in payment platform development.
• Bachelor degree in computer science or related majors.
• Proficient in Java 8, familiar with Java multi-threading, high concurrency, IO/NIO, network communication, etc.
• Familiar with design patterns, with experience in large-scale distributed, high concurrency, high load, high availability systems.
• Master various common server technologies to optimize service response and data query, ensure service quality, and solve high concurrency/availability issues.
• Familiar with Spring/Spring Boot.
• Familiar with HTTP, TCP/IP and REST specifications.
• Master Gradle/Maven and other build tools.
• Familiar with Docker cluster.
• Familiar with JSON & XML.

Responsibilities

• Lead the planning, design, and implementation of the Airwallex engineering system.
• Work with the business/product team to understand business needs, scenarios, and development directions, perform system analysis and architecture design, and ensure high-quality complex architecture.
• Design and develop components based on the company's microservice framework.
• Introduce innovative technologies and solutions for the team.
• Responsible for construction and management of the technical team and establishing coding standards.

Skills

Core Java development

Java 8

Multi-threading

High concurrency

High availability

Spring Boot

REST API

Gradle

Maven

Docker

JSON

XML

Distributed systems

Design patterns

HTTP

TCP/IP

Education

Bachelor's degree in CS

Tools

Docker

Kubernetes

Aliyun Cloud

AWS

Job description

Airwallex in Singapore/Shanghai is seeking a senior backend engineer to help build and scale our next-gen billing platform. You will design, develop and integrate core pricing, billing and invoicing capabilities with a microservice architecture.

The role emphasizes Java 8, high-concurrency systems and modern cloud tooling. You’ll collaborate with product, data, and engineering teams across borders to deliver reliable, scalable solutions for global customers.