Senior Software Engineer, Global Payments

Seoulstart; Singapore; On-site; SGD 200,000 - 260,000; Full time

Job summary

Airwallex aims to strengthen its payment infrastructure with scalable APIs and services for secure, global processing. You will collaborate with global engineering teams to coordinate delivery and ensure seamless integration with users and financial partners.

The role emphasizes design, development, and maintenance of robust payment systems, with strong attention to production reliability and security practices.

Qualifications

• Five or more years of professional software engineering experience.
• Design elegant systems abstracting complex patterns, ideally in financial services.
• Strong systems thinking, code quality, and documentation; Kotlin preferred.
• Maintain high standards operating and supporting production payment systems.
• Follow engineering, security, and design best practices consistently.
• Make decisions collaboratively with diverse stakeholders and domain experts.
• Bridge gaps between teams and collaborate effectively across disciplines.

Responsibilities

• Build infrastructure services strengthening payment processing, security, and customer trust
• Collaborate with systems and teams to build robust global payment infrastructure
• Engage engineering teams across Airwallex global offices to coordinate delivery
• Work with users and financial partners to ensure seamless payment integrations
• Design, develop, and maintain APIs, services, and reliable payment processing systems
• Troubleshoot production issues across different levels of the technology stack
• Own and optimize critical components within Airwallex online payment processing flow
• Drive payment integration processes and real-time transaction security assurance

Skills

Systems thinking

Code quality

Documentation

Collaboration

Tools

Java

Kotlin

Spring Boot

REST APIs

OAuth2.0

JWT

PostgreSQL

Redis

NoSQL

Kafka

RabbitMQ

Nginx

Istio

AWS

GCP

Aliyun

Job description

What you'd do:

• Build infrastructure services strengthening payment processing, security, and customer trust
• Collaborate with systems and teams to build robust global payment infrastructure
• Engage engineering teams across Airwallex global offices to coordinate delivery
• Work with users and financial partners to ensure seamless payment integrations
• Design, develop, and maintain APIs, services, and reliable payment processing systems
• Troubleshoot production issues across different levels of the technology stack
• Own and optimize critical components within Airwallex online payment processing flow
• Drive payment integration processes and real-time transaction security assurance

What they want:

• Hold minimum five years of professional software engineering experience
• Design elegant systems abstracting complex patterns, ideally in financial services
• Demonstrate strong systems thinking, code quality, documentation, preferring Kotlin
• Maintain high standards operating and supporting production payment systems
• Follow engineering, security, and design best practices consistently
• Make decisions collaboratively with diverse stakeholders and domain experts
• Bridge gaps between teams and collaborate effectively across disciplines

Nice to have:

• Familiarity with Spring or Spring Boot framework development
• Proficiency in Java, Kotlin, or other modern programming languages
• Strong knowledge of HTTP protocol and RESTful API specifications
• Working experience with OAuth2.0 and JWT authentication standards
• Experience using PostgreSQL, Redis, or other NoSQL databases
• Experience with Kafka, RabbitMQ, or similar messaging systems
• Familiarity with Nginx, Istio, or comparable infrastructure tooling
• Cloud experience on Aliyun, GCP, AWS, or similar platforms

• Designed and maintained complex public APIs with integration guides Hold minimum five years of professional software engineering experience
• Design elegant systems abstracting complex patterns, ideally in financial services
• Demonstrate strong systems thinking, code quality, documentation, preferring Kotlin
• Maintain high standards operating and supporting production payment systems
• Follow engineering, security, and design best practices consistently
• Make decisions collaboratively with diverse stakeholders and domain experts
• Bridge gaps between teams and collaborate effectively across disciplines