Senior AI Engineer

About Airwallex

Airwallex is the AI-native financial operating system for a real-time, intelligent economy. More than 675,000 businesses, including McLaren Racing, Qantas, SHEIN, and TikTok, use us, directly or through our platform partners, to run their financial operations or build and monetize financial products of their own.

We started in Melbourne in 2015 to build the infrastructure global commerce runs on. We're the regulated backbone behind global payments: not by accident, but by design. A decade plus, 85+ licenses, and a financial infrastructure spanning North America, Europe, the Middle East, and Asia-Pacific.

We're co-headquartered in San Francisco and Singapore, with more than 2,700 people across 27 offices. We hire builders with founder-level energy, people who move fast with good judgment, dig in with real curiosity, and make calls from first principles rather than waiting to be told what to do. Read our operating principles to see it in full.

Kai is Airwallex’s AI assistant, helping customers complete complex financial work with greater speed and control. As a senior engineer on the AI team, you'll build AI-driven products and systems that support internal teams, serve external customers and help Airwallex scale its expanding AI portfolio.

• Build AI solutions that enable growth and improve internal efficiency across Airwallex.

• Design robust APIs and system architecture for new AI applications.

• Own the end-to-end development of AI-driven solutions for internal teams and external customers.

• Shape the architecture and APIs that underpin advanced AI systems.

• Partner with cross-functional teams to bring customer-focused AI solutions to life.

• Raise engineering standards through high-quality, maintainable code, strong system design and effective mentoring.

You'll work from our Singapore office five days a week.

Essentials

• 3+ years of backend software development experience, with a focus on AI.

• Experience building internal or customer-facing products with LLMs.

• Proficiency in Python.

• Expertise in building efficient, large-scale software systems.

• Experience designing and developing large-scale, distributed, high-concurrency, high-load and highly available systems.

• A track record of writing high-quality, maintainable code.

• Excellent communication and mentoring abilities.

• A relevant degree in Computer Science, Mathematics or a related field.

Preferred

• Familiarity with MLOps practices and deployment pipelines for AI-driven products.

• You're comfortable owning the roadmap yourself.

• You're comfortable making decisions with incomplete information and moving quickly anyway.

• You hold yourself to a high standard even when no one is watching. Quality and accountability aren't external expectations, they're internal ones.

• You simplify complexity rather than hiding behind it.

• You say what you mean. You're direct, but you lead with respect.

• You value in-person collaboration and are happy being in the office five days a week.

AI at Airwallex is building the path from financial software to autonomous finance. At the center of this vision is Kai, Airwallex’s AI assistant and the intelligent interface to our global financial platform. Kai connects AI with capabilities across payments, accounts, transfers, cards, expenses, and other financial workflows—enabling customers to describe what they want to achieve while the system handles more of the complexity underneath.

You’ll build intelligent financial products and autonomous agents that understand business context, plan and reason across multi-step workflows, execute actions within clearly defined controls, and learn from outcomes. The work spans agent architecture, orchestration, context and knowledge systems, ontology, evaluation, governance, monitoring, and reliability.

The challenge is uniquely demanding: AI systems are probabilistic, while moving money requires precision, permissions, auditability, deterministic controls, and regulatory compliance. You’ll help define where AI should reason and where financial infrastructure must remain deterministic—turning frontier models into safe, controllable systems that businesses can trust.

Join exceptional engineers advancing Kai from assistance to action and, ultimately, toward autonomous finance—where customers define the outcome they want and intelligent systems securely execute more of the work required to achieve it.

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.