Senior Software Engineer, Scale
$90,000–$120,000 year
On-site · London, England, United Kingdom
Job Summary
As a Senior Software Engineer on the Scale Team at Airwallex, you'll build and maintain multi-tenant infrastructures that support major clients like Rippling and Qantas, ensuring high availability and performance. You will design solutions based on customer business requirements, delivering complex product features across various domains. Ideal candidates have at least 5 years of experience in Java/Spring Boot, excel in system design, and possess excellent communication skills. Experience in fintech or high-scale performance environments is a plus. This role offers an opportunity to impact global financial services significantly and grow into a technical leadership position.
Required Qualifications
- 5+ years of software engineering experience in Java/Spring Boot
- Strong role-related expertise and sharp thinking
- Ability to communicate effectively across technical and non-technical stakeholders
- Experience in making pragmatic decisions on optimization for performance vs. velocity
- Thrive in cross-functional environments spanning Product, Design, Compliance, and Sales
- Design for scale, maintainability, and production excellence
Desired Qualifications
- Fintech, payments, or regulated industry experience
- High-scale performance tuning (100k+ QPS, large user bases, strict latency SLAs)
- Multi-tenant SaaS or platform architecture background
- Proficiency with PostgreSQL, Redis, Kafka, or cloud platforms (AWS/GCP/Azure)
- Experience with OAuth2.0, API design, or developer documentation
- Cross-region deployment or data residency compliance experience
- Solutions engineering or customer-facing technical experience
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