brentbuilds

Patrick Brent Santiago

I build full-stack products, AI automations, and interfaces that ship, recover hours, and convert.

Full-stack developer · AI-automation builder · UI/UX

For founders and teams who need working software, not a hand-off chain — I design, build, and deploy it solo, AI-accelerated, end to end.

See the build Book a call Download résumé

Live in production ~842 organic searches/day Escrow payments Security-audited Built solo

Flagship — case study

UniDorms — a live two-sided marketplace, built solo, end to end

01Problem

Students and landlords near universities lack a trustworthy, end-to-end way to find and book housing with safe payments — listings are scattered, informal, and risky for both sides.

02Approach

Designed and built a two-sided marketplace solo, end to end — Next.js/React + Supabase/Postgres, 50+ API routes, escrow-style Xendit settlement (first-to-pay-wins atomic claim, auto-refunds, admin payouts), landlord KYC, host reputation, transactional email, continuous Vercel deploy — accelerated by directing a 31-agent AI dev team.

03Result

Live in production. ~842 organic searches/day, 50+ API routes, escrow payments live, security-audited — shipped by one person. See it running below.

live in production two-sided marketplace · escrow payments · solo-built visit unidorms.ph ↗
~842
Organic searches / day
50+
API routes in production
2
Sides of the marketplace
1
Engineer (hi)
  • Escrow-style payment settlement via Xendit — a "first-to-pay-wins" atomic claim, automatic refunds for the race losers, and admin-approved payouts
  • 50+ API routes covering booking, messaging, reviews, and disputes
  • Landlord KYC verification and a tiered host-reputation system
  • Next.js 14 / React frontend on a Supabase / Postgres backend
  • Analytics dashboards and transactional email baked in
  • Continuous deploy on Vercel — ship loop measured in minutes, not sprints
  • Growth engine included: Facebook ads plus in-house launch videos
Visit UniDorms ↗ Want something like this built? Let's talk

What I do for you

Three ways I make your product better

Full-stack products that ship

From database to deploy — one accountable builder who owns the whole chain, so nothing gets lost in a hand-off.

AI automation that recovers hours

Data extraction, matching & search, and multi-agent workflows that cut the manual work out of your week.

Interfaces that convert

Fast, accessible, on-brand front-ends — built to move visitors toward the action you need them to take.

Flight simulators

Don't take my word for it — press the buttons

Four working miniatures of things I've actually built, running right here in this page. No libraries, no servers, no smoke — each one is proof of something I can build for you.

The escrow race

payments / fintech

What this proves: real payment logic — safe money handling I can build for you. In UniDorms, when two people race to pay for the same room, exactly one payment wins the claim — atomically — and the other is refunded automatically. Every time.

ROOM 4B — 1 slot available OPEN
Buyer A waiting
Buyer B waiting
— settlement log: press "Run the race" —

The extraction terminal

AI features / data

What this proves: automation that recovers hours — AI pipelines that turn messy human text into clean, structured data, the way listings get ingested at scale. Watch a chaotic rental post become machine-ready JSON.

Structured output
// output appears here…

How I ship at agency scale, solo

AI orchestration

What this proves: the AI-consulting capability itself. I'm one builder directing 31 specialist agents across Design, Review, and Build pods — each with a defined job, a defined lane, and review gates between them. That's how a solo engineer ships (and audits) at agency scale. The crew deploys itself as the chart scrolls into view — select any star, by click or keyboard, to meet that crew member and see how it works.

I set the goal and approve the gates — the CEO agent runs the team.

Turns a goal into a plan, assigns the right specialists, decides what ships vs. what needs sign-off, and reports back. Auth, payments, database changes, and brand still stop at Brent's gate.

  • Design & UX

    • Typography, readability, type scale, and reading rhythm.

    • Guards design tokens, color, spacing, and visual consistency.

    • Component architecture, reusable UI, and layout discipline.

    • WCAG: keyboard nav, screen-reader structure, focus, and contrast.

    • Animation pacing, transitions, and respectful reduced-motion.

    • Touch targets, thumb reach, viewport correctness, and native-feel mobile UX.

  • Copy & Growth

    • CTAs, landing copy, and microcopy that converts.

    • Local-market fit: currency formatting, local payment methods, and regional tone.

    • Metadata, structured data, sitemaps, and indexability.

    • Topic strategy, briefs, and the content calendar.

    • Ready-to-post captions, scripts, and launch posts.

    • Event tracking, funnel coverage, and keeping PII out of analytics.

  • Review & Integrity

    • Hunts crashes, runtime errors, and unsafe data access.

    • Confirms a change caused zero unintended drift across pages and viewports.

    • STRIDE threat modeling: auth, IDOR, boundaries, and data leaks.

    • Hardens the app: secrets, route protection, and webhook verification.

    • Traces the money: fee math, refunds, webhook idempotency, and reconciliation.

    • Fraud and scam patterns, moderation, and dispute signals.

    • Data-privacy review, PII inventory, and policy-vs-code accuracy.

  • Build & Data

    • Implements specs with targeted edits and verifies the build.

    • Unit, integration, and end-to-end tests, plus coverage gaps.

    • Database schema, row-level security, migrations, and indexes.

    • Metrics, funnel conversion, and decision-ready KPIs.

    • Quality of AI features: extraction pipelines, matching, and prompt evals.

    • Transactional email, deliverability, and a durable retrying outbox.

    • Core Web Vitals, bundle size, caching, and load speed.

    • Deploy hygiene, env vars, cron health, and observability.

    • Walks every user journey, clicking every button end to end.

  • Support & Ops

    • Support flows, canned replies, and help-center accuracy.

    • Keeps the team's knowledge base current and organized.

What never gets automated: auth, payments, database changes, and brand — those pass a human gate before anything ships.

The second-brain constellation

knowledge systems

What this proves: knowledge that compounds instead of rotting — I build LLM-maintained "second brains": self-updating knowledge bases where every note stays linked to its neighbors. Hover a star to light up its connections; drag it and the constellation follows.

My solar system

Everything I bring to a build

Everything orbits the same goal — getting your product live, working, and growing.

Toolkit — the software I use

Not a decoration wall: React · Supabase · Xendit and the rest of the core stack are powering UniDorms in production right now. Hover — or tab — across the array to power each instrument up in its own brand color.

Languages & Frameworks

  • JavaScript
  • React
  • Next.js
  • Tailwind CSS
  • Node.js
  • SQL

Backend & Infrastructure

  • Supabase
  • PostgreSQL
  • Vercel
  • Git
  • GitHub

AI & Automation

  • Claude
  • ChatGPT
  • AI agent orchestration

Payments & Email

  • Xendit
  • Resend

Editor & Knowledge

  • VS Code
  • Obsidian
  • Notion
  • Slack
  • Google Workspace

Design & Content

  • Canva
  • CC CapCut

Data, Analytics & SEO

  • Microsoft Excel
  • M Minitab
  • Google Analytics
  • Search Console
  • Meta / Facebook Ads

gold dot = running UniDorms in production today

Full-stack web

React · Next.js 14 · Tailwind · JavaScript · Node.js — powering UniDorms, live

Databases & backend

Supabase · PostgreSQL · SQL — 50+ API routes serving production traffic

Payments & fintech

Xendit escrow settlement: first-to-pay-wins atomic claims, auto-refunds, admin payouts

AI features

Claude / Anthropic · AI-accelerated development · structured data extraction

AI agent orchestration

Directs 31 specialist agents in design / review / build pods — solo output at agency scale

Second-brain knowledge systems

LLM-maintained, self-updating knowledge bases (Obsidian + LLM wikis) that compound instead of rot

Industrial Engineering

Process optimization and data-driven rigor — it's my degree, and it shows up in how I build

Project management

Scoping, coordinating, and shipping — one owner from kickoff to delivery

Growth marketing

Facebook Ads — campaigns wired straight to the product funnel

Video & creative

Canva · CapCut · in-house launch videos

Data & analysis

Excel · Minitab · SQL — measure first, opine second

Copywriting & conversion

Words that pull their weight — landing pages, CTAs, microcopy

Mission control

One person. Full stack. Whole mission.

I'm a self-taught full-stack engineer and solo founder. I pair an Industrial Engineering background — process thinking, measurement, ruthless waste-cutting — with AI-accelerated development to take products from idea to production fast.

Hire me and you get the whole chain — design, frontend, backend, database, payments, deployment, and copy — from one pair of hands that has done it for real, in production.

Flight training

2019 – 2024

De La Salle University
B.S. Industrial Engineering
Minor in Information Technology

  • Superpower: shipping the whole thing, solo
  • Method: AI-accelerated, engineering-rigorous
  • Style: direct, warm, allergic to buzzwords

Flight log

What I've shipped along the way

  1. 2026 – Present

    Founder & Sole Engineer — UniDorms

    Sachi Tech OPC

    Shipped a production two-sided marketplace solo: escrow payments, landlord KYC, host reputation, 50+ API routes, transactional email, analytics, and continuous deploys — plus the ads and launch videos that bring users in. Now serving ~842 organic searches a day. The flagship above is the case study.

  2. 2024 – Present

    Sales Manager

    Digital Network Communications

    Owns project sites and key accounts end to end — scoping, coordinating technical teams, and closing — which is to say: I'm comfortable owning client communication and delivery, not just the code.

  3. 2023

    Accounting Intern

    PGA Cars

    Reconciled bank records, job orders, audits, and payables — where I learned that details either reconcile or they don't. Useful instinct for someone who now moves money in code.

Open a channel

Got something to build?

If you need someone who can take a product from "napkin sketch" to "live, taking payments, and growing" — without a hand-off in the middle — book a call.

Book a call — patrick_brents@yahoo.com LinkedIn ↗ Download résumé

No forms, no funnels. Just email me like a person. References available on request.