I'm a Full Stack Engineer who ships AI-native products end-to-end. I architect backend infrastructures, design resilient database schemas, and build high-performance frontends and mobile apps. I take ownership of the whole product lifecycle, from schema design to production deployment.
Recent shipped work:
Elizabeth.ai: multi-tenant AI commerce SaaS for Filipino micro-businesses. One platform handles Messenger ordering, live inventory, and a suki memory layer that recognizes returning customers. I built a regex-first Taglish parser that resolves roughly 60% of orders before any LLM fires, orchestrated a three-provider cascade (Claude Sonnet 4, Gemini 2.5 Flash, GPT-4o) with per-vendor circuit breakers, and wrote the conversation engine as character-as-config so the same pipeline runs distinct Ordering and Sales personas per merchant.
Urie.ai: offline-first fitness app built for Filipinos who eat real Filipino food. Auto-adjusting TDEE that recalibrates as your weight drops without manual re-entry, 1,500 foods from the FNRI database so "pork adobo" isn't approximated as "roast pork," and a 2.3B-param Gemma model running on-device via llama.rn so the AI coach has zero subscription cost. A custom Kotlin Expo module keeps workout sessions alive on hostile OEMs (OPPO, Xiaomi, Realme) where most "offline" apps die silently
Core Engineering Expertise:
System Architecture: Distributed systems with modern stacks (Next.js / Supabase) and high-concurrency environments (Elixir / Phoenix).
AI Orchestration: Multi-provider LLM cascades (Claude, Gemini, GPT-4o), on-device inference via llama.rn, regex + LLM hybrid parsing for cost control, semantic routing with embeddings, and circuit breakers for vendor reliability.
Mobile & On-Device: React Native / Expo, custom Kotlin native modules, llama.rn for local LLM inference, SQLite + Drizzle ORM, offline-first architecture with crash-recovery state persistence.
FinTech & Transactional Logic: Dual-ledger wallet systems powering real money transactions, atomic operations with zero data loss, and complex Stripe payment flows with zero tolerance for race conditions.
Real-Time & Multiplayer: WebSockets and real-time state synchronization. Built creator-fan messaging platforms and a hybrid graphical / text MMORPG engine using ECS architecture with client-side prediction and server reconciliation.
DevOps & Reliability: Containerization (Docker), background task processing (Celery / Redis), GDPR-compliant data infrastructure, Sentry crash telemetry, and EAS Build pipelines for mobile.
Technical Stack:
Mobile: Expo SDK 55, React Native 0.83, Kotlin (custom Expo modules), llama.rn, Notifee, expo-location, expo-sensors, kalman-filter
Frontend: Next.js (App Router), React, Tailwind CSS, TypeScript, Zustand, TanStack Query
Backend: Supabase / PostgreSQL, Node.js (Deno), TypeScript, Elixir / Phoenix, Django (Python)
AI: Anthropic Claude, Google Gemini, OpenAI, Groq, OpenRouter, Gemma (on-device via llama.rn)
Infrastructure: Docker, Redis, Stripe API, Vitest / Cypress, CI/CD, Supabase Edge Functions, Vercel, EAS Build, Sentry
I'm a Cum Laude IT graduate with 9+ industry certifications (CCNA, Python, Security). I thrive in roles where I can take full ownership from initial schema design to final production deployment. I'm looking for opportunities where I can ship complex, AI-integrated products end to end, not just stitch together CRUD endpoints.
