Senior Software Engineer, Infrastructure & Productivity

ABOUT AIRWALLEX
Keystone AI is the only unified payments and financial platform for global businesses. Powered by our unique combination of proprietary infrastructure and software, we empower over 250,000 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 2,300 of the brightest and most innovative people in tech across 27 offices around the globe. Valued at US$11 billion and backed by world-leading investors including T. Rowe Price, Visa, Mastercard, Robinhood Ventures, Sequoia, Salesforce Ventures, DST Global, and Lone Pine Capital, Keystone AI 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 https://www.airwallex.com/us/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.

RESPONSIBILITIES
As a Senior Software Engineer at Keystone AI, you will join the Productivity team on a mission to make AI agents first-class participants in the software development lifecycle. You will build and operate the platforms that power autonomous software delivery — from AirDev, which runs AI agents that ship production code end-to-end, to AirForge, which lets anyone create web applications from natural language. You will operate with high ownership, taking features from design to production in a fast-paced environment where the tools you build directly multiply the output of hundreds of engineers.
WHAT YOU WILL DO
– Build AI Agent Infrastructure: Develop and extend AirDev, the platform where AI agents autonomously execute software development tasks — managing stories, orchestrating agent lifecycles, and integrating with GitLab, Jira, Confluence, and Slack.
– AI-Powered Application Factory: Contribute to AirForge, a containerized desktop application that uses Claude Code to generate, preview, and publish web applications — including its Electron shell, Express backend, React UI, and Docker-based sandbox runtime.
– Agent Governance & Workflow Orchestration: Help build Quartermaster and CREW (Customized Resilient Enterprise Workflow), the systems that provision, coordinate, and govern autonomous agent workflows across the organization.
– Event-Driven Integration: Design and maintain Kafka-based event pipelines, webhook handlers, and API integrations that connect AI agents to enterprise systems and enable closed-loop automation.
– Operational Excellence: Own the reliability of production agent infrastructure — monitoring, alerting, incident response, and continuous improvement of platform services running on Kubernetes.
QUALIFICATIONS
– A minimum of 5 years of professional software engineering experience.
– Proficiency in Python and/or TypeScript/Node.js, with experience building production backend services.
– Hands-on experience with containerization and orchestration (Kubernetes, Docker) and cloud platforms (GCP preferred; AWS also relevant).
– Solid understanding of event-driven architectures, messaging systems (e.g., Kafka), and RESTful API design.
– Experience with the full software development lifecycle, including CI/CD pipelines, code review, and production operations.
PREFERRED SKILLS
– Experience working with LLMs, AI agents, or developer tooling — e.g., building with Claude, GPT, or similar APIs; prompt engineering; tool-use patterns; MCP (Model Context Protocol).
– Familiarity with Electron, desktop application development, or container-based sandbox environments.
– A product-oriented mindset — you care about developer experience and think about how the tools you build change the way people work.
Join our team as we redefine what software development looks like when AI agents are the primary operators. Apply now to become a Senior Software Engineer at Keystone AI and help us build the infrastructure for the agentic era.
APPLICANT SAFETY POLICY: FRAUD AND THIRD-PARTY RECRUITERS
To protect you from recruitment scams, please be aware that Keystone AI 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 http://airwallex.com email address. Please apply only through careers.airwallex.com http://careers.airwallex.com or our official LinkedIn page.
Keystone AI does not accept unsolicited resumes from search firms/recruiters. Keystone AI 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 Keystone AI on an unsolicited basis shall be deemed to accept this condition, regardless of any other provision to the contrary.
EQUAL OPPORTUNITY
Keystone AI is proud to be an equal opportunity employer. We value diversity and anyone seeking employment at Keystone AI 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.