Senior Software Engineer, Onboarding

airwallex (singapore) pte. ltd.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Airwallex is seeking a Backend Engineer to design, build, and operate scalable microservices in Java/Kotlin. You’ll work on data pipelines, analytics platforms, and event‑driven architectures powering global payments infrastructure.

You’ll collaborate with cross‑functional teams, participate in code reviews, and enforce security and compliance across a high‑availability platform serving customers worldwide.

Qualifications

• Proficient in Java/Python/Go with strong CS fundamentals.
• Experience delivering enterprise-grade software with streaming data (Kafka).
• 5+ years in modern engineering practices (CI/QA).
• Strong OOP concepts and responsibility for scalable backend systems.
• Experience with domain-driven and event-driven architectures.

Responsibilities

• Design, architect, and maintain scalable backend microservices in Java/Kotlin or similar.
• Collaborate with data scientists and product managers on data pipelines and analytics platforms.
• Work with Frontend, Product, Design, and Marketing to translate requirements into backend solutions.
• Develop services supporting rapid A/B testing and real-time performance monitoring.
• Promote secure coding and compliance, with robust authentication/authorization.

Skills

Java

Python

Go

CI/CD

OOP

Event-driven design

Tools

Kafka

Job description

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 150,000 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 1,700 of the brightest and most innovative people in tech across 26 offices around the globe. Valued at US$6.2 billion and backed by world‑leading investors including Visa, Airtree, Blackbird, Sequoia, DST Global, Greenoaks, Salesforce Ventures, Lone Pine, and Square Peg, 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.

About the Team

Onboarding team plays a pivotal role in Airwallex's mission by facilitating the rapid integration of businesses into our platform. As a data‑driven team, we utilize extensive analytics to refine our processes and ensure the efficiency and effectiveness of our operations. Our primary mission involves performing Know Your Customer (KYC) and risk‑based operations to maintain the highest standards of compliance and security as we handle sensitive financial data, and empower business customers through robust, secure, and intuitive user and account management solutions.

This team is instrumental in our regional expansion, helping to onboard a growing number of customers into new markets. By supporting global expansion, we are also tasked with increasing the coverage of our product offerings, ensuring that businesses worldwide can benefit from our innovative financial solutions. Through our efforts, we aim to streamline the onboarding process, reduce barriers to entry, and foster a secure and compliant environment that empowers businesses to thrive in the digital economy.

What You’ll Do

• Design and Build Scalable Systems
  Architect, develop, and maintain microservices in Java/Kotlin (or similar languages), ensuring our high‑traffic, high‑availability systems meet global user demands.
  Implement best practices for service‑to‑service communication, orchestration, and fault tolerance.
• Enable Data-Driven Decisions
  Collaborate with data scientists and product managers to design data pipelines, analytics platforms, and event‑driven architectures.
  Ensure the data powering our Growth initiatives is accurate, reliable, and easily accessible.
• Collaborate and Innovate
  Work closely with cross‑functional teams—Frontend, Product, Design, and Marketing—to translate business requirements into scalable backend solutions.
  Participate in architectural reviews, code reviews, and strategy sessions to continually elevate the quality and performance of our backend services.
• Experiment and Iterate
  Develop services that support rapid A/B testing, feature toggles, and real‑time performance monitoring.
  Continuously improve backend functionalities to reduce friction, increase user engagement, and drive conversions.
• Promote Security & Compliance
  Integrate secure coding practices and frameworks to protect user data and maintain global regulatory compliance.
  Identify potential vulnerabilities, ensure robust authentication and authorization mechanisms, and proactively address security risks.

Qualifications

• Have a career in Software Engineering with strong capabilities in modern programming languages like Java, Python or Go.
• Sophisticated level knowledge with design and delivery of Enterprise Grade software with streaming data solutions like Kafka.
• 5+ years of experience in modern engineering practices focused on continuous integration and quality engineering.
• Strong computer science fundamentals, solid understanding of OOP concepts.
• Experience domain driven design and event driven architectures.

Why Join Us

• Be Part of Something Big: Join a team that's redefining the future of finance. Contribute directly to the core engine of user growth in a company that is reshaping global financial services.
• Grow With Us: At Airwallex, we're committed to your professional development. You'll have opportunities to learn, grow, and shape your career path in a fast‑paced, innovative environment.
• Collaborate With the Best: Work with a team of talented and passionate individuals who are driven by the desire to create something extraordinary.

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.

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.