Based in AustraliaHello,
Hello,
I'm Sian
Full Stack Engineer · AI Systems
Building backend systems that hold up, and products that make sense to use.
c.yuhsuann
Full Stack Engineer · AI Systems
Building backend systems that hold up, and products that make sense to use.
Sole backend engineer on QuantalAI's AI meeting intelligence platform. Designed Temporal-based workflow architecture replacing an event-driven pipeline architecture, enabling reliable retries and long-running LLM agent workflows. Platform has attracted active interest from enterprise clients in cross-language communication use cases.
Delivered a complete booking and payment system end-to-end as part of the internship at QuantalAI, completing Stripe payment integration, AWS Cognito authentication, and booking flow logic ahead of commercial launch.
Built an internal task tracking application end-to-end as the sole engineer during the QuantalAI internship, covering system architecture, AWS infrastructure, and full-stack implementation with no additional engineering support.
Led a 4-person design team to deliver a mental health app MVP for international students in Australia within a 6-week sprint, running 2 rounds of usability testing with 12 participants each. Completed as a UX Design internship project at Australian Pacific College, running concurrently with full-time engineering work at QuantalAI.
Delivered a production-ready skincare e-commerce platform improving discoverability and reducing checkout friction, enabling a non-technical client to independently manage their business.
Building backend systems that hold up, and products that make sense to use.
I'm a Full Stack Engineer with a background in both system architecture and product thinking. I work closest to the backend, designing APIs, integrating services, and turning ambiguous requirements into stable, working systems.
What makes my work different is that I've also done the design side. I've led UX sprints, conducted user testing, and shipped interfaces, which means I can work directly with founders and PMs without losing things in translation.
Open to product and engineering roles where craft and clarity matter.
Whether you have a product challenge, a technical problem, or just want to connect, I'm always happy to chat.