Hi, I'm Mark Muya
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I build beautiful, purposeful apps for web and Windows. From mass intention platforms for Catholic parishes to open event registration tools — I turn real needs into products people actually love using.
About Me
Building apps that matter.
I'm Mark Muya, a full-stack developer passionate about creating software that genuinely helps people. Whether it's a mass intentions platform that unites Filipino Catholic parishes in prayer or an open event registration tool that makes gatherings effortless — I build with purpose.
My stack spans C# and .NET for Windows desktop applications, Next.js for fast web experiences, and AI tools such as Claude and OpenAI Codex to support intelligent features and development workflows.
I'm currently open to new opportunities — full-time roles, contract work, or exciting collaborations. Let's build something great together.
Desktop Apps
C# / .NET and WPF for Windows
Web Apps
Next.js, React, TypeScript full-stack
AI Features
Claude API & OpenAI Codex workflows
Clean Code
TypeScript-first, tested & documented
Featured Apps
What I've Built
Real products crafted with care — explore them or ask about a custom solution.
Wedding Planner Desk
One organized workspace for professional wedding planners.
An offline-first Windows desktop application for managing clients, weddings, vendors, quotations, billing, payments, tasks, schedules, documents, and optional Google Calendar and Drive synchronization.
What it does
- Client, couple, wedding, venue, and package management
- Quotations, billing statements, payments, and PDFs
- Vendor coordination, tasks, and event schedules
- Optional Google Calendar and Drive integration
Built for working wedding planners
Learn how the app works and review its transparent Google data-use and privacy information.
weddingplanner.markmuya.comColumbary Management System
Careful records, accountable operations, and dignified service.
A secure Windows desktop system designed for parish columbary operations. It brings niche inventory, donor profiles, interment schedules, receipts, accounting, reports, audit history, and verified backups into one organized workspace.
What it does
- Searchable niche map and inventory across 3,500 niches
- Donor profiles, assignments, schedules, and interment records
- Receipts, statements, vouchers, accounting, and printable reports
- Role-based access, audit history, and verified local backups
Panalangin
Every prayer, lifted together at the Holy Eucharist.
A dignified web platform for Filipino Catholic parishes to receive, manage, and display mass intentions during every celebration of the Holy Eucharist — beautifully encoded by parish staff and shown on the altar screen for the whole community.
What it does
- Community prayer united at every Holy Mass
- Projector-ready altar display, works offline
- Parish staff encodes & manages all intentions
- Novena & multi-day date range support
Free 3-month trial for parishes
Parish offices request an access code, register, and start displaying intentions on the altar screen — in under 10 minutes.
panalangin.markmuya.comCountMeIn
Event registration, beautifully simple.
A free, open event registration platform. Organizers create events, manage registrants, scan QR codes at entry, run raffles, and export attendance records with certificates.
What it does
- QR code check-in & check-out
- Multi-day attendance tracking
- Raffle wheel for live attendees
- Shareable attendance certificate
Free & open to everyone
Organizers sign up free. Registrants join events with a QR code — no account needed.
countmein.markmuya.comHave a project in mind?
I'm always open to building something new and exciting. Let's talk.
Start a ConversationExpertise
My Tech Stack
Tools and technologies I use to bring ideas to life.
Frontend
- ▲Next.js
- ⚛️React
- 🔷TypeScript
- 🎨Tailwind CSS
Backend
- 🟢Node.js
- 🪟C# / .NET
- 🐘PHP
- 🐍Python
- 🔌REST APIs
- 🐬MySQL
- 🗄️SQLite
AI & Tools
- 🧠Claude API
- ✨OpenAI Codex
- 🔹PostgreSQL
- 🔀Git
4
Apps Featured
100%
TypeScript
∞
Coffee Consumed
24/7
Passion for Code
Let's Talk
Ready to Work Together?
Whether you want to hire me, collaborate on a project, or just say hello — my inbox is always open.
Location
Open to Remote & On-site
Available worldwide for remote work
Response Time
Within 24 hours
I read every message and respond promptly
Hire me for your next project
I specialize in building modern web and Windows applications with clean code, great UX, and AI-powered features. I'm detail-oriented, communicative, and deliver on time.
- ✓ C# / .NET Windows desktop applications
- ✓ Next.js web applications
- ✓ AI integrations and workflows (Claude, OpenAI Codex)
- ✓ Full-stack PHP/MySQL backends