Software Engineer

Phi Digital • Singapore • 2022–Present

• • Designed and built Polaris — a production AI agent system with persistent memory (semantic embeddings + structured facts), context engineering that assembles life state from 9+ data sources into bounded context windows, and 6 autonomous proactive behaviors (birthday reminders, relationship fade detection, spending anomalies, streak encouragement, morning briefings, mood monitoring)
• • Engineered agent memory architecture: dual-storage learning (embedding-backed semantic memory + key-value learned facts), real-time fact extraction from every conversation, and daily insight summarization that detects behavioral patterns across 24-hour windows
• • Built context engineering pipeline that constructs optimal agent context within limited attention — queries calendar, relationships, goals, expenses, trackers, and mood data in parallel, formats into structured prompt sections, and ranks by relevance
• • Implemented agent tool calling with 15+ client-side tools: event creation, expense tracking, contact management, pending reply resolution, social handle storage — each with verification and error recovery
• • Integrated real-time AI voice via ElevenLabs Conversational AI with Gemini LLM backend — WebRTC streaming, function calling during voice sessions, and interrupt handling
• • Architected multi-tenant data platform with owner_type/owner_id polymorphic ownership across 28 tables, organization support, and row-level security policies — enabling agents to operate within scoped data boundaries
• • Built Life Context API v1 — external platform for third-party agents to read user context and queue actions, with API key auth, scope-based access control, and rate limiting
• • Shipped end-to-end Stripe payment infrastructure: Checkout Sessions, subscription lifecycle webhooks, Customer Portal, and automated plan enforcement

Vidy • San Francisco • 2017–2020

• • Defined technical architecture for the design system serving enterprise ad-tech clients; established component library that reduced iteration cycles by 30%
• • Led cross-functional decision-making across 3 product teams — owned architecture decisions from data model design to frontend implementation strategy
• • Bridged design and engineering: built reusable component primitives, directly contributed to frontend codebase, and mentored junior designers on technical constraints

Multiple Clients • Remote • 3+ years

• • Shipped 10+ production web applications across fintech, music tech, and e-commerce verticals
• • Built multi-chain Web3 wallet system supporting 4 providers across 6 EVM networks with server-side cryptographic signature verification
• • Designed event booking platform processing live Stripe payments with admin workflows, WhatsApp notifications, and automated email pipelines

Gemini 2.0 Flash • ElevenLabs Voice • Supabase • pgvector • TypeScript

• • Built autonomous agent runtime — thinks, executes tool calls, verifies results, and recovers from errors across 15+ action types
• • Designed memory architecture with dual storage: semantic embeddings (pgvector, 768-dim) for similarity search + structured learned facts for precise recall
• • Engineered context assembly pipeline that queries 9+ tables in parallel, builds a unified Life State document, and caches with 15-min freshness for optimal context within token limits
• • Implemented 6 proactive agent behaviors running on cron: birthday reminders, relationship fade alerts, spending anomalies, streak encouragement, morning briefings, mood monitoring
• • Integrated real-time voice via ElevenLabs Conversational AI with WebRTC, client-side tool calling during voice sessions, and Gemini as the reasoning backend
• • Built Life Context API for third-party agent access — scoped API keys, rate limiting, action queuing

Next.js 14 • Supabase • Stripe • 120+ API Routes • Netlify

• • Built complete SaaS solo — 120+ API endpoints, Stripe subscriptions, admin dashboard, 18K+ notable person profiles
• • Designed multi-tenant organization system with polymorphic data ownership across 28 tables and RLS policies
• • Engineered infinite-scroll virtualized timeline rendering 10,000+ items with cursor-based pagination and prefetch buffering
• • Published 100+ SEO-optimized pages with Schema.org structured data

Next.js • Hyperliquid API • WebSocket • Supabase • TypeScript

• • Built real-time trading terminal with live orderbook streaming via WebSocket, automated trading strategies, and direct exchange execution on Hyperliquid
• • Engineered low-latency data pipeline — real-time price feeds, order state management, and cryptographic transaction signing
• • Open source on GitHub — demonstrates production real-time systems and complex state management

Web Audio API • Real-time DSP • TypeScript • Canvas

• • Built browser-based synthesizer with real-time DSP — resonant filter modeling, oscillator design, sub-millisecond scheduling
• • Demonstrated math-heavy engineering: filter coefficient computation, FFT-based visualization at 60fps, low-latency audio graph management