Growth Backend Engineer (Java/Kotlin)

Airwallex; San Francisco (CA); On-site; USD 150,000 - 230,000; Full time

Job summary

Airwallex is seeking a Backend Engineer for its Growth team in San Francisco to architect, develop, and maintain scalable microservices powering global user acquisition and engagement. You’ll enable data-driven experimentation and collaborate across product, design, and marketing to deliver robust backend solutions.

The role emphasizes high-availability systems, secure coding, and close work with data scientists and engineers to push the next wave of global expansion.

Qualifications

• Bachelor’s degree or above in computer science or engineering related majors.
• 5+ years of experience in modern engineering practices focused on CI and quality engineering.
• Strong computer science fundamentals and understanding of OOP concepts.
• Experience with domain-driven design and event-driven architectures.
• Deep experience with high throughput/low latency distributed systems.
• Cloud experience with GCP (preferred) or AWS (EC2, RDS, ELB, CloudFront, etc.), and familiarity with Docker and Kubernetes.
• Familiarity with observability tooling such as Splunk, Grafana, and Prometheus.

Responsibilities

• Architect, develop, and maintain microservices in Java/Kotlin; ensure high-traffic, high-availability systems meet global demands.
• Implement best practices for service-to-service communication, orchestration, and fault tolerance.
• Collaborate with data scientists and product managers to design data pipelines, analytics platforms, and event-driven architectures.
• Ensure Growth data is accurate, reliable, and easily accessible for key decisions.
• Translate business requirements into scalable backend solutions by working with Frontend, Product, Design, and Marketing teams.
• Participate in architectural reviews, code reviews, and strategy sessions to continually improve backend quality and performance.
• Develop services that support rapid A/B testing, feature toggles, and real-time performance monitoring; improve backend functionalities to boost engagement and conversions.
• Integrate secure coding practices to protect user data and address security risks.

Skills

Java/Kotlin expertise

OOP concepts

Domain-driven design

Event-driven architectures

High throughput/low latencydistributed

Strong CS fundamentals

Education

Bachelor’s degree or above in computer science or engineering related majors

Tools

Docker

Kubernetes

GCP

AWS

Observability tools (Splunk, Grafana, Prometheus)

Spring/Spring Boot

Data warehousing/analytics tools

AI/LLMs integration familiarity

Job description

Airwallex is seeking a Backend Engineer for its Growth team in San Francisco to architect, develop, and maintain scalable microservices powering global user acquisition and engagement. You’ll enable data-driven experimentation and collaborate across product, design, and marketing to deliver robust backend solutions.

The role emphasizes high-availability systems, secure coding, and close work with data scientists and engineers to push the next wave of global expansion.