Available for freelance work

Hi, I'm Gelo.

Senior Software Engineer & AI Solutions Builder

I build full-stack web apps, mobile experiences, and AI-powered tools that ship fast and scale well.

Based in the Philippines

// ABOUT ME

Turning complex
problems into
elegant software.

I'm Gelo — a Senior Software Engineer and solo founder based in the Philippines, helping startups and businesses bring their software ideas to life. I specialize in building production-grade full-stack web applications, React Native mobile apps, and AI-powered SaaS products — from concept to deployment.

Whether you need a complete SaaS platform, a mobile app, or AI/LLM capabilities integrated into your product, I deliver end-to-end solutions built for performance and scale — using whatever technology fits your project best.

I work directly with founders and teams who want a technical partner, not just a developer. You get clear communication, fast iteration, and production-ready code — shipped on time.

7+Years Experience

20+Projects Shipped

5+SaaS Products Built

// EXPERTISE

The right tool for the right problem.

I adapt to what your project needs — here's what I reach for most often.

FRONTEND

TypeScript / JS

React / TanStack Start

React Native

BACKEND & DATA

PostgreSQL / MySQL

Prisma / Drizzle

BullMQ / Redis

AI / INFRA

OpenAI / Claude

Node.js / Bun

AWS / CloudFlare / Railway

Not married to any single stack — if there's a better tool for your project, I'll use it. What matters is shipping something great.

// SERVICES

What I build for you.

End-to-end software development, from idea to deployed product.

Full-Stack Web Apps

Custom web applications designed to grow with your business. Whether it’s an internal tool, a customer-facing platform, or a full SaaS product — I build it fast, reliable, and ready to scale.

Mobile Apps

Cross-platform iOS & Android apps with a native feel and smooth UX. One codebase, two platforms, faster time to market.

AI / LLM Integration

Bring AI into your product — from intelligent assistants and content generation to automated workflows and data analysis. I handle the architecture so you get real results, not just a demo.

SaaS MVP Development

Go from idea to paying customers, fast. Authentication, billing, dashboards, and your core features — built right and ready to scale from day one.

// TESTIMONIALS

What people say.

Feedback from clients and collaborators I've worked with.

“An exceptional engineer who delivers clean, performant code on tight deadlines. Transformed our platform with a modern stack and thoughtful architecture.”
AR
Alex RiveraCTO, Stackline

“Working with Christian was a game-changer. He took our vague requirements and turned them into a polished product that exceeded expectations.”
SC
Sarah ChenProduct Lead, Novexa

“Rare combination of deep technical skills and design sensibility. Our app performance improved dramatically and the UI felt world-class.”
MT
Marcus TanFounder, Breezly

// PROJECTS

Things I've shipped.

A selection of real-world projects built for real users.

Coming Soon

AI / MLOpenAIBullMQPrismaPostgreSQL

AI Document Processing Pipeline

Built an AI-powered document processing system using GPT-4o/4o-mini agents with automated extraction, classification, and structured output. Handles high-throughput workloads with BullMQ queues and Prisma/PostgreSQL.

View Live

WebCloudflareTypeScript

Dreams Travel & Tours PH

A Philippine travel agency website featuring tour packages, booking flows, and a modern responsive design — deployed on Cloudflare Workers for edge performance.

Coming Soon

SaaSReactTypeScriptPrismaBullMQ

Full-Stack SaaS Platform

Production SaaS application built with TanStack Start (React), TypeScript, PostgreSQL, and Prisma. Includes authentication, dashboards, and background job processing via BullMQ/Redis.

// INSIGHTS

Writing & thoughts.

Occasional notes on engineering, AI, and building products.

Feb 14, 2026

How I built an AI-powered code reviewer that actually saves time

Building AI tools that fit into real developer workflows - not just demos. Here is what I learned shipping a GPT-4 powered PR reviewer to 200+ users.

Jan 30, 2026

TypeScript patterns I wish I knew 2 years ago

Generics, discriminated unions, template literals - the patterns that changed how I write TypeScript.

Jan 10, 2026

RAG pipelines in production: what actually works

After shipping 3 RAG-based products, here's the architecture that actually holds up under real user load.

// CONTACT

Let's build
something great.

Whether you have a project in mind or just want to chat — I'm always open to new work.

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