Senior Software Engineer, Scale

Responsibilities

• Build and maintain multi-tenant infrastructure powering global companies like Rippling, Navan, and SHEIN
• Architect systems that aggregate requests across platform customers while meeting enterprise-grade SLAs for availability, latency, and throughput
• Own cross-domain product features including tax systems, compliance-driven flows, and monetization tools
• Design technical integrations for enterprise prospects to translate business requirements into scalable solutions
• Lead multi-team initiatives with measurable technical or business impact

Requirements

• 5+ years of software engineering experience with proficiency in Java and Spring Boot
• Expertise in system and component design, balancing flexibility with simplicity
• Proven experience leading multi-team initiatives
• Ability to design for scale, maintainability, and production excellence
• Strong communication skills to interact with technical and non-technical stakeholders

Preferred Qualifications

• Experience in fintech, payments, or highly regulated industries
• Background in high-scale performance tuning (e.g., 100k+ QPS, strict latency SLAs)
• Experience with multi-tenant SaaS or platform architecture
• Proficiency with PostgreSQL, Redis, Kafka, or cloud platforms (AWS/GCP/Azure)
• Experience with OAuth2.0, API design, or cross-region deployment and data residency compliance

About the Company

Airwallex is a unified payments and financial platform for global businesses. Powered by proprietary infrastructure and software, we empower over 200,000 businesses worldwide to manage business accounts, payments, spend management, and treasury at a global scale. Based in Melbourne with over 2,200 employees across 26 offices, we are building the future of global banking.