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Backend Engineer II, Payments Application - Job Opportunity at Airwallex

Singapore, Singapore
Full-time
Mid-level
Posted: May 22, 2025
On-site
SGD 120,000 - 180,000 annually based on Singapore market rates for fintech engineers with similar experience

Key Responsibilities

Lead development of payment and billing solutions for global platforms
Design and implement scalable backend systems using Domain Driven Design principles
Drive technical integration with major e-commerce platforms
Maintain and optimize mission-critical payment applications
Collaborate with international teams on cross-functional projects
Provide technical leadership in customer and partner integrations

Requirements

Education

Bachelor's degree in Computer Science or related field

Experience

3+ years of engineering experience with 2+ years in Java development

Required Skills

Java 8 Multi-threading High concurrency IO/NIO Network communication Design patterns Domain Driven Design PostgreSQL MySQL Redis Memcached Kafka Spring/Spring Boot HTTP TCP/IP REST Gradle/Maven Docker
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Sauge AI Market Intelligence

Industry Trends

The global fintech sector is experiencing rapid expansion with particular growth in payment infrastructure, driven by increasing cross-border commerce and digital transformation Integration-first payment platforms are becoming central to enterprise architecture, with a growing demand for engineers who can bridge traditional financial systems with modern e-commerce platforms Cloud-native payment solutions are seeing accelerated adoption, particularly in the APAC region where digital payment adoption is outpacing global averages

Role Significance

Typically part of a 6-8 person engineering pod within a larger payment systems organization of 30-50 engineers
Mid to senior-level individual contributor role with significant technical ownership and architectural input

Key Projects

Development of payment orchestration systems for global e-commerce platforms Implementation of high-throughput transaction processing systems Integration of payment services with major e-commerce platforms like Shopify and WordPress Design and implementation of scalable billing and invoicing systems

Success Factors

Deep understanding of distributed systems and high-availability architecture Strong grasp of payment systems security and compliance requirements Ability to work effectively across international teams and time zones Experience with modern cloud infrastructure and containerization

Market Demand

Very high demand, particularly in Singapore's growing fintech hub, with a significant shortage of engineers who combine payment domain knowledge with distributed systems expertise

Important Skills

Critical Skills

Java ecosystem expertise is fundamental for core payment processing systems Distributed systems knowledge is essential for building reliable, high-throughput payment services Domain Driven Design expertise is crucial for managing complex financial business logic

Beneficial Skills

Experience with multiple programming languages broadens integration capabilities Cloud platform knowledge enables efficient scaling and deployment Understanding of financial systems and payment protocols accelerates impact

Unique Aspects

Opportunity to work on payment systems at global scale with transaction volumes in billions
Exposure to cutting-edge fintech infrastructure and modern technical stack
Direct impact on international payment systems used by major global brands

Career Growth

2-3 years in role before advancement, with accelerated progression possible based on project impact and technical leadership

Potential Next Roles

Senior Backend Engineer Technical Lead Payment Systems Architect Engineering Manager

Company Overview

Airwallex

Airwallex is a rapidly growing fintech unicorn valued at US$5.6 billion, specializing in global payment infrastructure and financial platforms

Leading position in APAC fintech sector with strong global expansion trajectory, competing with established payment infrastructure providers
Strategic APAC hub in Singapore with significant investment in technical talent and infrastructure
Fast-paced, innovation-focused environment with emphasis on technical excellence and global collaboration
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