Shipping Gala · open to collaborations

Full Stack Engineer · Iloilo City, Philippines

Hans
Daduya.

I build mobile and web products end to end — Expo apps, NestJS APIs, and the pipelines that ship them. Six years writing software, close to four of them professionally.

  • TypeScript
  • React Native
  • Expo
  • Next.js
  • NestJS
  • PostgreSQL
  • tRPC
  • Prisma
  • GraphQL
  • Bun
  • Turborepo
  • Railway
  • Anthropic API

Featured · Founder & engineer · — now

Gala — plan a night out with your friends in one tap.

An AI-powered app for planning group outings, built for Filipino barkada culture. Tell it the city, the vibe and the budget and it builds a real itinerary — stops, timing, travel between them and a per-person split — that the whole group can vote on, join and follow live on the day.

  • Turborepo monorepo: Expo SDK 54 mobile app, NestJS 11 + MikroORM API, Next.js 16 landing & admin.
  • AI plan generation with the Anthropic API, Google Places ingestion, live group voting and per-person budget splits.
  • Production plumbing: RevenueCat subscriptions, OneSignal push, Sentry, EAS builds & OTA, Railway CI/CD with staging → prod gates.
  • Expo · React Native
  • NestJS · MikroORM
  • PostgreSQL · Supabase
  • Next.js 16 · Tailwind v4
  • Anthropic API
Gala's itinerary screen: a six-stop foodie day trip with the cost per person, travel time and a timeline of stops.

Selected work

Things I've shipped.

All repositories
  • Pitch competition · IoT

    Best Pitch · Moonshot TNK 2023 (DTI Region VI)

    RideSafe

    A motorcycle safety system: a smart helmet paired with a real-time monitoring platform to cut road deaths in the Philippines. Built and pitched with Central Philippine University.

    • IoT
    • Real-time monitoring
    • Mobile
  • Hackathon · Health —

    Champion · HackFest 2022 (GDSC Loyola) · 2nd Runner Up · Impact Hackathon 2021

    Medic Marie

    SMS platform that gives people in far-flung areas with little internet 24/7 medical help and information — nearby hospitals, doctors and AI-assisted symptom guidance — over plain text.

    • Next.js
    • Globe Labs SMS API
    • MongoDB
    • AI
  • Hackathon · Mental health —

    Pitched at Hong Kong PolyHack 2023

    VoiceVault

    A second-brain journal: log your thoughts and day-to-day rants and let AI suggest healthier ways to cope. Includes a debate mode where an AI helps you analyse arguments, rebuttals and facts.

    • Next.js
    • tRPC
    • PostgreSQL
    • TypeScript
  • College · Mobile + web

    TestTrek

    Study and quiz app on the T3 Turbo stack — one typesafe tRPC API serving both the Expo mobile app and the Next.js web client, with Clerk for auth.

    • Next.js
    • Expo
    • tRPC
    • Prisma
    • Clerk
    • Turborepo
  • Co-founded · Mobile —

    UniHub

    A buy-and-sell marketplace made for students — list, browse and trade within your campus community. Live on iOS and Android.

    • React Native
    • Expo
    • TypeScript
  • College · Web —

    Polymath

    A time-based math trainer: build your own drills and race the clock to sharpen mental arithmetic. Software Engineering coursework at CPU.

    • React.js

The route so far

Experience.

Product engineer at heart: I like owning a feature from the API schema to the release notes, and I care about the boring parts — tests, CI, observability — because they're what let a small team ship fast.

Education

B.S. Software Engineering

Central Philippine University · —

Programming and mathematics were the favourites; hackathons were the habit — HackFest, Impact Hackathon, Hong Kong PolyHack, Moonshot TNK.

  1. Now

    Founder & Full Stack Engineer

    Gala · getgala.app

    — now

    Designing and building Gala end to end — Expo mobile app, NestJS API, Next.js landing and admin. Own the AI itinerary pipeline, group voting, budget splits, subscriptions, push, and the CI/CD that deploys staging on every merge.

    • Expo SDK 54
    • NestJS 11
    • MikroORM
    • Next.js 16
    • Anthropic API
    • Railway
    • EAS
  2. Mobile Engineer

    Captivate · The Prelude · Remote

    — · 1 yr 5 mos

    Built The Prelude, a luxury travel concierge mobile app, as one of two engineers on the product. Shipped the iOS and Android app from scratch in React Native, Expo and TypeScript on a NestJS + PostgreSQL backend, and owned the EAS build and OTA release pipeline end to end.

    • React Native
    • Expo
    • TypeScript
    • NestJS
    • PostgreSQL
    • EAS Build & Update
  3. Frontend Engineer

    Devy · Sydney, Australia

    — · 1 yr 9 mos

    Built a web application for managing sales and supply-chain operations for Grounded Packaging — primarily Next.js and TypeScript, with Ruby on Rails, PostgreSQL and AWS (S3, Lambda, Cognito, SES). Ran code reviews and reported progress to the CTO and stakeholders.

    • Next.js
    • TypeScript
    • Ruby on Rails
    • PostgreSQL
    • AWS
  4. Full Stack Software Engineer

    UniHub · Central Philippine University

    — · 8 mos

    Co-founded UniHub, a buy-and-sell marketplace for students. Launched the mobile app on iOS and Android in React Native, Expo and TypeScript, and served as Scrum Master for the team.

    • React Native
    • Expo
    • TypeScript
    • Scrum Master
  5. Full Stack Software Engineer

    Invesko · Metro Manila

    — · 1 yr

    Built the mobile app for trading US stocks in React Native and Expo, plus a paper-trading account simulator on the web in partnership with PayMaya. Also worked on trading functionality in the Fastify backend.

    • React Native
    • Expo
    • Fastify
    • TypeScript

Toolbox

What I reach for.

TypeScript everywhere. Type-safe from database to screen, tested end to end, deployed from CI.

  • Mobile

    • React Native
    • Expo + Expo Router
    • NativeWind
    • WatermelonDB
    • React Query
    • Maestro
    • EAS Build & Update
  • Web

    • React 19
    • Next.js
    • TypeScript
    • Tailwind CSS
    • Vite
    • Tauri
  • AI & data

    • Anthropic API
    • OpenAI API
    • LLM integrations
    • RAG + pgvector
    • Zod structured output
  • Backend

    • NestJS
    • Express
    • Fastify
    • tRPC
    • GraphQL
    • Prisma
    • MikroORM
    • PostgreSQL
    • Ruby on Rails
    • Golang
  • Infra & practice

    • AWS (S3, Lambda, Cognito, SES)
    • Turborepo + pnpm
    • GitHub Actions
    • Railway
    • Supabase
    • Sentry
    • RevenueCat
    • Agile / Scrum

Where to next?

Let's build something worth shipping.

Freelance, full-time, or a hackathon weekend — if it involves a mobile app, a good API, or a hard problem, I'd love to hear about it.