Staff Software Engineer, Backend - Scale

About the Company

Airwallex is a global payments and financial technology platform built for businesses operating across borders. Its infrastructure and software support more than 200,000 companies worldwide, including Brex, Rippling, Navan, Qantas, and SHEIN, across business accounts, payments, spend management, treasury, and embedded finance.

Founded in Melbourne, the company has grown to a team of more than 2,200 people across 26 offices. It is valued at US$8 billion and supported by investors such as T. Rowe Price, Visa, Mastercard, Robinhood Ventures, Sequoia, Salesforce Ventures, DST Global, and Lone Pine Capital.

What the Team Works On

• Developing and supporting multi-tenant embedded finance infrastructure that serves major customers and meets demanding availability, latency, throughput, and cross-region requirements.
• Owning cross-functional product capabilities that sit across business, regulatory, and technical boundaries, including areas such as taxation, compliance-heavy workflows, and monetization tooling.
• Creating technical solutions for enterprise prospects by converting business needs into architecture that can influence large deal outcomes.

Role Impact

• Contribute directly to the growth of businesses using Airwallex products.
• Work closely with engineers, product managers, and designers from concept through launch.
• Apply strong product understanding to build solutions that address real customer needs.
• Use data to evaluate product performance and identify opportunities to improve outcomes.

What Success Looks Like

• Making well-balanced abstraction decisions that keep systems both flexible and simple.
• Communicating clearly with both technical and non-technical stakeholders.
• Choosing the right trade-off between performance and delivery speed based on business value.
• Building systems designed for scale, long-term maintenance, and production quality.
• For Staff-level candidates, leading initiatives across multiple teams with measurable technical or business results.

Preferred Background

• At least 5 years of software engineering experience, with 8+ years expected for Staff level, especially in Java and Spring Boot.
• Experience in fintech, payments, or regulated industries is a strong advantage.
• Background in high-scale systems, including performance tuning at 100k+ QPS and low-latency environments.
• Exposure to multi-tenant SaaS or platform engineering.
• Hands-on familiarity with PostgreSQL, Redis, Kafka, or major cloud environments such as AWS, GCP, or Azure.
• Knowledge of OAuth 2.0, API design, and developer documentation.
• Experience with cross-region deployments or data residency compliance.
• Customer-facing technical work or solutions engineering experience is beneficial.

Why Join

• Be part of a company aiming to reshape global finance.
• Grow your career in an environment that encourages learning and ownership.
• Collaborate with talented, driven colleagues who are building ambitious products.

Applicant Safety Notice

To reduce the risk of recruitment fraud, the company will never request bank details, sensitive identity information such as passport numbers, or any payment during the hiring process. Official communication is sent only from an @airwallex.com email address.

Applications should be submitted only through the company’s official careers channel or official social media page. The company does not accept unsolicited resumes from search firms or recruiters and will not pay fees for candidates submitted without a prior agreement for the relevant opening.

Equal Opportunity

The employer is committed to equal opportunity hiring and evaluates candidates based on merit, qualifications, competence, and talent. Employment decisions are made without regard to color, religion, race, national origin, sexual orientation, ancestry, citizenship, sex, marital or family status, disability, gender, or any other legally protected status. Accommodation can be requested for disabilities or special needs.

Compensation

The listed compensation range is SGD 240K to SGD 300K.