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Frontend Engineer & Landlord.
I Build Tools I Actually Use.

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CS grad from UNCC ('23). I manage rental properties in Charlotte, NC - which is why I built Slipify, a live iOS app that generates and sends professional rent receipts to my tenants. I specialize in React and React Native, and I like turning real problems into shipped software.

Josai Kinzunga
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About Me

I Build the Tools
I Actually Use.

I graduated from UNC Charlotte in 2023 with a BS in Computer Science. A few months into managing my first rental property, I got tired of making rent receipts by hand in Word. So I built Slipify - a React Native app that generates professional PDF receipts and tracks tenant payments. I use it every month.

That's how I like to work: find a real problem I have, build the smallest thing that solves it, and ship it. I specialize in React and frontend architecture, but I'm happiest when I'm deep in a problem that touches real users - even if that user is just me and my tenants.

When I'm not coding, I'm probably fixing something at a property or figuring out how to automate the boring parts of landlording.

Based in

Charlotte, NC

Degree

CS - UNCC '23

Also a

Property Manager

Focus

React & Frontend

Published on the App Store

Slipify

Rent receipt generator - built for my own properties, now available to everyone.

Featured Projects

Two things I've actually shipped - one's live on the App Store, one I use every month.

Slipify icon
iOS App

Slipify

A React Native app I built because I was tired of making rent receipts by hand. Generates PDF receipts and tracks payment history - offline-first, no backend required.

  • Built with Expo to ship fast without managing native iOS build chains
  • Offline-first - all data stored locally, no backend needed
  • Live on the App Store, used monthly for my own properties
React NativeExpoiOSAsyncStorage
AI Integration

Roamly

An AI travel planner that turns a simple prompt into a day-by-day itinerary, built with React and the OpenAI API.

  • Structured prompts force JSON output from GPT-4, parsed into a day-by-day UI
  • Cached itineraries in localStorage so a refresh doesn't lose your plan
  • Mobile-first layout, since most trip planning happens on a phone
ReactOpenAI APITailwindPrompt Engineering
What I Do

Services

The two things people usually reach out to me for.

Web App Development

Modern, responsive web apps built with React and TypeScript. This portfolio and Roamly are both built this way.

  • React / TypeScript
  • Tailwind CSS
  • REST & API integration
Email me

Mobile Apps (iOS)

Native-feel iOS apps built with React Native and Expo. Slipify is live on the App Store - built, shipped, and used by real people.

  • React Native / Expo
  • App Store submission
  • Push notifications
Email me
josai-kinzunga — currently-building
~ current_projects
[1]Hairstylist Client DashboardIn Progress

Booking and client management tool for independent stylists

[2]Landlord OS — Small Landlord Command CenterPlanning

All-in-one dashboard for landlords with 1-10 properties