CARNAJE.

Full-stack Software Engineer • Philippines

MJ CARNAJE

Turning AI into products people actually use.

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AI SPECIALIZATION

🤖
⚡️
📈

Production-Ready AI Solutions

Transforming business problems into AI-powered products — from real-time streaming interfaces to intuitive AI-assisted workflows.

Core Mastery

Agentic & Multi-Model Systems

OpenAIAnthropicGoogleMetaMistralDeepSeek
🔍
📚
🧠

RAG & Knowledge Retrieval

WORK

Featured Projects

“Building digital products that bridge the gap between human needs and AI potential.”

Kita Tracker
Case Study 01

Kita Tracker

What started as a simple tool to help my sister manage her small food business has grown into Kita Tracker - a modern inventory management and business analytics platform built specifically for small food businesses in the Philippines. This is my personal startup project that I'm passionate about because I've seen firsthand how Filipino entrepreneurs struggle with tracking inventory, sales, and expenses. The platform combines a full POS system, real-time inventory tracking, and business analytics - all completely free because I believe every sari-sari store, carinderia, and small food business deserves access to professional tools. I'm on a mission to help more Filipino entrepreneurs succeed.

StartupSaaSReactTypeScriptNext.jsTailwind CSSPostgreSQLPrismaAnalyticsPOS SystemInventory Management
Anaya Care
Case Study 02

Anaya Care

I am the full-stack developer for Anaya Care, an enterprise-grade care management platform built as a comprehensive monorepo with three interconnected applications: a NestJS backend API with extensive feature modules and dual Socket.IO gateways, a React Native/Expo mobile app with role-based interfaces, and a Next.js web application with comprehensive dashboard pages. The platform features real-time communication, AI-powered care planning with specialized OpenAI services, HIPAA-compliant document management, advanced shift scheduling with GPS tracking, and comprehensive health monitoring to streamline elderly care services.

Next.jsReactNestJSReact NativeExpoNode.jsTypeScriptSocket.IOBullMQRedisMongoDBAWS S3Stripe (Payment Gateway)Resend (Email Service)Twilio (SMS Service)OpenAI (AI Service)Google Generative AITailwind CSSShandcn UINextAuthVercel
Build My Wealth: Personal Finance App
Case Study 03

Build My Wealth: Personal Finance App

As the Lead Mobile Developer & Co-Founder, I built Build My Wealth, a personal finance app featuring a sophisticated offline-first architecture with RxDB and bi-directional CouchDB synchronization. The app uses CRDT-based conflict resolution for eventual consistency, reactive data layer with observables for automatic UI updates, and fully offline-capable financial transaction workflows.

React NativeExpoTypescriptRxDBCouchDBCRDTOffline-First
Geriatric Care Solution
Case Study 04

Geriatric Care Solution

I am the full-stack web developer for Geriatric Care Solution, an enterprise-grade geriatric care platform featuring extensive React components, MongoDB models, and custom hooks. This sophisticated application combines cognitive health activities including AI-generated crosswords, sudoku, and paint-by-numbers, family collaboration tools through Family Circles, an AI-powered e-book creation wizard, and comprehensive care management features. The platform integrates dual AI systems (OpenAI GPT-4 + Google Generative AI) for personalized content generation, real-time communication via Socket.IO, and a multi-tier subscription system with Stripe. With extensive admin management capabilities and specialized features for dementia support, it serves as a complete digital care ecosystem for seniors, caregivers, and healthcare professionals.

Next.jsReactTypeScriptNode.jsMongoDBTailwind CSSShandcn UINextAuthTanStack QueryZustandSocket.IOStripe (Payment Gateway)OpenAI (AI Service)Google Generative AIResend (Email Service)Twilio (SMS Service)CloudinaryPuppeteerVercel
Iligan Stray Feeders
Case Study 05

Iligan Stray Feeders

I am the full-stack web developer for Iligan Stray Feeders, a web application that helps animal lovers feed stray dogs and cats in Iligan City, Philippines.

FlaskMySQLJinjaTailwind CSSMailgun (Email Service)

STACK

I choose the right tools for the job, focusing on scalability and user experience.

JavaScript
TypeScript
Python logo
Python
React
Next.js
React Native
Expo
Node.js
NestJS
Flask
Tailwind CSS
Sass
MongoDB
PostgreSQL
MySQL
Redis
Prisma
GraphQL
Socket.IO
Firebase
Supabase
AWS S3
Docker

LET'S
WORK TOGETHER