Agustinus Nathaniel

I’m a Senior Product Engineer and Tech Lead with 5+ years of experience building and scaling web and mobile applications across fintech, proptech, and commerce SaaS. I focus on strong frontend architecture, reliable delivery, and shipping user-centric products.

Most recently, I helped lead product engineering at a FinTech B2B SaaS, designing and establishing web/mobile frontend architecture with TypeScript, React, Vite, Astro, and Expo—React Native. I owned end-to-end development of data-intensive internal dashboards and interactive customer platforms, while collaborating closely with Product and Design to craft user journeys and prioritize high-impact features.

I’ve also scaled mobile and web products in property technology, where I built and maintained apps using Flutter, Next.js, and TypeScript. I delivered performance and quality improvements by improving CI/CD pipelines (reducing deployment time and increasing test coverage) and contributed to reusable design system components, mentorship, and clean-code practices.

Across my experience, I’ve enjoyed leading hiring, onboarding, and mentorship, managing multi-project delivery, and partnering with backend teams on API design, authentication flows, and data modeling. I bring a practical interest in Agentic Engineering and AI Assisted Development, along with deep tooling and infrastructure experience—from CI pipelines to Kubernetes-based deployment and developer automation.