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

Hi, I'm Brent — a self-taught builder who ships real products end to end: design, code, deploy, solo and AI-accelerated. My standout build is Unidorms, a live marketplace that helps students find safe, verified housing near campus. What drives me is seeing my work help real people — lately by going deep on AI-powered tools.

Patrick Brent Santiago

Core skills

Three things I'll do for you

01

Full-stack products

Database to deploy, one accountable builder — nothing lost in hand-offs.

02

AI automation & orchestration

LLM pipelines and multi-agent workflows that recover hours of manual work.

03

UI / UX

Fast, accessible interfaces that move visitors toward one clear action.

Flagship

Unidorms — a live two-sided marketplace, built solo

Shipped a two-sided marketplace solo: escrow payments, landlord KYC, host reputation, disputes, and transactional email — live in production and serving real students.

~842
Organic searches / day
50+
API routes in production
2
Sides of the marketplace
1
Engineer (hi)
Next.js 14ReactSupabase / PostgreSQLXendit escrowResendVercelTailwind CSS

How I ship at agency scale — solo

An AI dev team I direct, not a prompt I pray over.

One builder directing 31 role-specialized AI agents across Design, Review, and Build pods, with review gates between them. A CEO agent turns a goal into a plan and assigns the right specialists; I set the goal and approve the gates. It's how one person ships at the pace of a studio.

This is the opposite of vibe coding. I own the architecture and every merge. Auth, payments, database migrations, and brand changes all stop at my gate for human review before they ship. The AI is my team; the engineering judgment — and the accountability — is mine.

Design pod

  • Editorial & typography
  • Frontend systems & layout
  • Accessibility (WCAG)
  • Mobile & motion

Review pod

  • Security & STRIDE threat model
  • Payments-integrity & refunds
  • Correctness & regression
  • Database schema & RLS

Build pod

  • Spec implementation
  • Automated tests & coverage
  • Performance & deploy hygiene
  • End-to-end workflow QA

Selected engineering

Hard problems, solved — not glued together.

Payments / fintech

The escrow race

When two students race to pay for the same room, exactly one payment wins — atomically — and the other auto-refunds. Every time, with no double-charge and no double-payout.

What it proves: safe money handling under real concurrency.

AI features / data

The extraction pipeline

An LLM pipeline turns messy, free-form human rental posts into clean, schema-validated JSON — with salvage and retry when a model returns broken output.

What it proves: AI automation that recovers hours of manual entry.

Knowledge systems

Second-brain systems

LLM-maintained knowledge bases (Obsidian + wikis) where every note stays linked to its neighbors — a second brain that compounds instead of rotting.

What it proves: systems thinking that scales a solo operator.

Capabilities

What I bring to a team

Full-stack web

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

Databases & backend

Supabase · PostgreSQL · SQL — 50+ API routes in production.

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

Directing a 31-agent dev team with human review gates between pods.

Second-brain systems

LLM-maintained knowledge bases (Obsidian + wikis) that compound instead of rot.

Industrial Engineering

Process optimization and data-driven rigor — my degree, visible 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.

Toolkit

Next.jsReactTailwindJavaScriptNode.jsSupabasePostgreSQLXenditResendVercelGitClaudeFacebook AdsCanvaCapCutExcelMinitabSQL

Experience

What I've shipped along the way

Founder & Sole Engineer — Unidorms

Sachi Tech OPC · 2026 – Present

Shipped a two-sided marketplace solo: escrow payments, landlord KYC, host reputation, disputes, and transactional email — live in production at ~842 organic searches/day. Built an AI-orchestrated dev system (31 specialist agents with human review gates) to ship at agency scale without cutting engineering rigor.

Sales Manager — Digital Network Communications

2024 – Present

Own project sites and key accounts end to end — scoping, coordinating technical teams, and delivering telecom solutions on schedule.

Accounting Intern — PGA Cars

Apr – Aug 2023

Reconciled bank records, job orders, audits, and payables. Details either reconcile or they don't — a habit that carries into how I build.

About

One person. Full stack. Whole mission.

I ship full-stack apps end to end — design, frontend, backend, database, payments, deploy. Unidorms, my own live marketplace, takes real payments in production.

Day to day I direct a 31-agent AI dev team with review gates — how one builder ships at agency scale. My Industrial Engineering degree shows up as process thinking and measurement, not buzzwords.

Location: Based in the Philippines with a home in Orange County, CA — open to full-time roles (remote or on-site) and freelance builds. No relocation friction on your end.

Education

2019 – 2024

De La Salle University — Manila
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

Contact

Got something to build?

Hiring, or need a product taken from napkin sketch to live and taking payments — with no hand-offs in the middle? Reach out.

No forms, no funnels — just email me: brents3121@gmail.com. References on request.