As co-founder and solo engineer, leading a cross-functional team of 6, I architected and built the system end to end: a Gleam/OTP platform, a multi-stage RabbitMQ worker pipeline, and a knowledge-graph memory layer whose graph algorithms detect the structural gaps in a user's life story, all on reproducible Nix-managed infrastructure.

Inside 'Brain', the agentic core, I built a production tool-calling loop with confirmation gates, multi-hop Steiner-tree retrieval, and a 90x graph-query optimization over the knowledge graph. On top of it the product shipped realtime voice chat, an insight engine mining behavioral signals at daily, weekly, and monthly cadences, proactive nudges, auto-generated 'Lore' character profiles, and daily reflections and weekly narrative postcards.

I instrumented the product in PostHog, from standard funnels to bespoke metrics testing the product thesis, and made the call to shut it down in 2026 when the data showed no market fit.

Contributed to the fullstack development of a critical healthcare portal using Next.js, building both backend and frontend components to enhance functionality.

Engineered new features for OCBC Bank's high-traffic consumer and business mobile banking applications, production systems serving millions of users.

Founded the engineering org's agentic AI initiative: built a unified agent workspace that makes 54 production repos, runtime maps, infrastructure, and logs legible to AI coding agents from a single root, and drove team-wide adoption through its launch and engineering brown bags.

Architected and maintained AWS Lambda microservices and backend features for legacy PHP systems.

Proposed a full Android platform rewrite (Kotlin/Jetpack Compose) with data-backed analysis, then drove the initiative, raising the Play Store rating from 2.7 to 4.7 and reducing crash rates by over 90%.

Also led the rewrite of the merchant-facing application from React Native to native Android, significantly improving maintainability and merchant satisfaction, while supporting the iOS consumer app.

Designed the surge pricing algorithm and the end-to-end software architecture for both the backend and mobile ecosystems, including realtime systems for driver tracking, live trip streaming, and dynamic fare calculation.

Developed both the Owto (Passenger) and Owto Driver applications on top of that architecture.