About Airwallex

Airwallex is the only unified payments and financial platform for global businesses. Powered by our unique combination of proprietary infrastructure and software, we empower over 200,000 businesses worldwide – including Brex, Rippling, Navan, Qantas, SHEIN and many more – with fully integrated solutions to manage everything from business accounts, payments, spend management and treasury, to embedded finance at a global scale.

Proudly founded in Melbourne, we have a team of over 2,200 of the brightest and most innovative people in tech across 26 offices around the globe. Valued at US$8 billion and backed by world-leading investors including T. Rowe Price, Visa, Mastercard, Robinhood Ventures, Sequoia, Salesforce Ventures, DST Global, and Lone Pine Capital, Airwallex is leading the charge in building the global payments and financial platform of the future. If you’re ready to do the most ambitious work of your career, join us.

Attributes We Value

We hire successful builders with founder-like energy who want real impact, accelerated learning, and true ownership. You bring strong role-related expertise and sharp thinking, and you’re motivated by our mission and operating principles. You move fast with good judgment, dig deep with curiosity, and make decisions from first principles, balancing speed and rigor.

You're humble and collaborative; turn zero‑to‑one ideas into real products, and you “get stuff done” end-to-end. You use AI to work smarter and solve problems faster. Here, you’ll tackle complex, high‑visibility problems with exceptional teammates and grow your career as we build the future of global banking. If that sounds like you, let’s build what’s next.

About the team

Become an integral part of our Identity and Access Management (IAM) and Account team, where you will play a critical role in advancing our identity solutions and fortifying our account infrastructure. We are on the lookout for passionate engineers driven to work on cutting-edge projects that enhance the availability, scalability, and security of our platform. Engage in global collaboration with product managers, designers, and fellow engineers to deliver exceptional IAM solutions that safeguard businesses and optimize our account infrastructure for Airwallex's exponential growth.

What you'll do

As a Senior Backend Engineer on the IAM & Account Infra team, you will shape the long-term technical vision and architecture for Airwallex's identity, authentication, and core account domains. You will design and build high-availability, cloud-native products (using Java/Kotlin) that secure our platform and optimize account infrastructure for global scale. Partnering cross-functionally with Product, Security, and Compliance teams, you will translate complex regulatory demands into scalable technical roadmaps that safeguard thousands of businesses worldwide.

This role is based in Singapore.

Responsibilities:

Strategic Leadership & Roadmap:

• Technical Strategy: Define the long-term technical vision and architectural strategy for Airwallex’s Identity (IAM) and account infrastructure domains. Make high-level decisions and select technology stacks that support long-term scalability.

• Roadmap Planning: Partner closely with Product Managers and Engineering Directors to translate business goals into a concrete technical roadmap. Prioritize initiatives based on risk, commercial value, and engineering bandwidth.

• Cross-Functional Alignment: Act as the technical bridge between Engineering, Legal, Compliance, and Security teams to ensure our technical roadmap aligns with global regulatory changes.

Engineering & Architecture:

• System Design & Development: Design, develop, and maintain high-availability (HA) IAM products and account infrastructure using Java/Kotlin and cloud-native technologies.

• Security Engineering: Implement industry-standard security protocols (e.g., OAuth2, OIDC, SAML) to safeguard business data and ensure compliance with global financial regulations.

• Infrastructure Optimization: Architect and optimize scalable infrastructure solutions to support high transaction volumes and ensure system reliability.

• Code Quality & Excellence: Champion engineering excellence by conducting code reviews, writing automated tests, and establishing best practices for performance and security.

Team Leadership & Mentorship:

• Coaching & Development: Mentor junior and senior engineers through code reviews, design docs, and career guidance. Foster a culture of engineering excellence and ownership within the team.

• Best Practices: Establish and enforce standards for code quality, security, and system reliability. Drive technical initiatives that improve developer velocity and system observability.

Who you are

We're looking for people who meet the minimum qualifications for this role. The preferred qualifications are great to have, but are not mandatory.

Minimum qualifications:

• Education: Bachelor’s Degree or higher in Computer Science, Engineering, Information Technology, or a related field.

• Experience: 6 years of professional experience in software engineering, with a focus on backend development

• Technical Proficiency:

  • Strong proficiency in modern programming languages such as Java, Kotlin, Go, or Python.

  • Deep understanding of Identity and Access Management (IAM) concepts (Authentication, Authorization, SSO, MFA).

  • Experience with cloud platforms (AWS, GCP, or Azure) and containerization technologies (Docker, Kubernetes).

  • Solid knowledge of relational and non-relational databases (e.g., PostgreSQL, Cassandra, Redis).

• Leadership: Demonstrated experience in mentoring engineers and leveling up team capabilities.

• Security Knowledge: Familiarity with application security best practices and secure coding standards (OWASP).

Preferred qualifications:

• Experience in the Fintech, Banking, or Payments industry.

• Experience with data governance tools or privacy-enhancing technologies (PETs).

• Experience working in a high-growth startup or unicorn environment.

#Singapore

Applicant Safety Policy: Fraud and Third-Party Recruiters

To protect you from recruitment scams, please be aware that Airwallex will not ask for bank details, sensitive ID numbers (i.e. passport), or any form of payment during the application or interview process. All official communication will come from an @airwallex.com email address. Please apply only through careers.airwallex.com or our official LinkedIn page.

Airwallex does not accept unsolicited resumes from search firms/recruiters. Airwallex will not pay any fees to search firms/recruiters if a candidate is submitted by a search firm/recruiter unless an agreement has been entered into with respect to specific open position(s). Search firms/recruiters submitting resumes to Airwallex on an unsolicited basis shall be deemed to accept this condition, regardless of any other provision to the contrary.

Equal opportunity

Airwallex is proud to be an equal opportunity employer. We value diversity and anyone seeking employment at Airwallex is considered based on merit, qualifications, competence and talent. We don’t regard color, religion, race, national origin, sexual orientation, ancestry, citizenship, sex, marital or family status, disability, gender, or any other legally protected status when making our hiring decisions. If you have a disability or special need that requires accommodation, please let us know.