Senior Software Engineer, Tech Platform - Notification

Airwallex2 months ago

Location

SG - Singapore

Type

Full Time

Level

Senior

Role

Senior Software Engineer

Posted

Jan 14, 2026

Full TimeSenior

The role

Summary

Airwallex is seeking a Senior Software Engineer for their Tech Platform - Notification Team in Singapore to design and maintain a high-throughput notification platform serving SMS, Email, and Push messages to 200,000+ global businesses. The role involves building cloud-native, event-driven architectures using reactive programming, distributed systems, and advanced gateway solutions while collaborating across global teams to support Airwallex's $8B fintech platform.

What you'll do

Platform Development: Design, develop and maintain a resilient, high-throughput, low-latency Notification Platform to deliver messages (SMS, Email, Push) to customers worldwide

Architecture Standards: Maintain high architecture standards and craftsmanship through Event Driven Architecture requiring high scalability, traceability and automation

Channel Expansion: Identify new opportunities to engage adopters through delightful adoption experience and extension over various channels, such as WhatsApp and inbox notifications

Cross-team Collaboration: Engage with Product, Engineering, and Design teams across Airwallex's global offices, fostering effective communication through fast pace business transformation

Data Insights: Provide data insights to support business decisions and optimize notification delivery performance

Production Support: Troubleshoot production issues across different levels of the stack to ensure system reliability

Workflow Operations: Operate and maintain scheduled workflow, search and gateway systems as part of a highly efficient team

What we look for

Technical

Backend DevelopmentMore than 5 years of backend development experience with large-scale systems

Programming LanguagesProficient in Java/Kotlin, C++, or Python with strong software design and system design abilities

Distributed SystemsAt least 3 years of experience building distributed systems using middleware like Kafka and PostgreSQL

Event Pipeline ManagementHands-on experience managing, maintaining and tuning event pipelines

Java ExpertiseFamiliar with Java memory management, multi-threading, high concurrency, IO/NIO, network communication

Education

Bachelor's DegreeBachelor degree or above in computer science or engineering related majors

Experience

Senior-Level Experience5+ years of backend development experience with proven track record in large-scale systems

Distributed Systems Experience3+ years of hands-on experience with distributed systems and middleware technologies

Platform ArchitectureExperience designing and maintaining high-throughput, mission-critical platforms

Skills

Required skills

Backend Development5+ years of experience developing large-scale backend systems

Java/KotlinProficiency in JVM languages for enterprise application development

Distributed Systems3+ years building systems with Kafka, PostgreSQL and event pipeline management

System DesignStrong software design and system architecture capabilities

ConcurrencyJava memory management, multi-threading, and high concurrency programming

Nice to have

Full-Stack InterestInterest beyond backend including design systems, search, AI, gateway technologies, and data analytics

Automation FocusExperience automating tasks and proactively reducing technical debt

Database ExpertiseExperience with PostgreSQL, Redis, and NoSQL database systems

Messaging PatternsProficiency in messaging patterns and building resilient systems

Kafka ImplementationHands-on knowledge with full Kafka implementation and management

Compensation & benefits

Benefits

Global Impact

Work on a platform serving over 200,000 businesses worldwide including major brands like Brex, Rippling, and SHEIN

Career Growth

Accelerated learning and true ownership opportunities with founder-like energy culture

Innovation Focus

Work with cutting-edge technologies including reactive programming, temporal workflows, and AI integration

Equal Opportunity

Inclusive workplace that values diversity and considers all candidates based on merit and qualifications

Interview process

1
Application Review — Initial screening of technical background and experience with distributed systems
2
Technical Phone Screen — Discussion of backend development experience, system design concepts, and Java/distributed systems knowledge
3
System Design Interview — In-depth system design session focusing on notification platforms, event-driven architecture, and scalability
4
Coding Assessment — Live coding session covering algorithms, data structures, and Java/Kotlin programming skills
5
Team Fit Interview — Cultural fit assessment with focus on collaboration, innovation mindset, and alignment with Airwallex values
6
Final Round — Technical deep-dive with senior engineers discussing architecture patterns, production challenges, and strategic technical decisions