AI-assisted app builder • Hungary, EU

Small business workflows turned into polished web app MVPs.

I build focused web apps for freelancers, small businesses, and early-stage founders: booking tools, dashboards, client portals, quote generators, reporting tools, and AI-assisted prototypes.

View Projects Hire Me on Contra

Built with Replit, OpenAI Codex, React, TypeScript, Tailwind, GitHub, and modern AI-assisted workflows.

From idea to testable demo

Workflow MVP

In build

01 Scope

02 Build

03 Demo

04 Handoff

Screens 06

Core flow Ready

Client portal flow

Quote preview state

Handoff notes

Services

Focused services for small, practical builds.

I work best on clear, scoped projects where the goal is to create a useful first version quickly.

Mini Web App MVP

A small, polished, functional web app to test an idea, workflow, or internal business process.

Responsive web app
One core workflow
Demo data
Live demo link
Handoff notes

Replit App Fix & UI Polish

I clean up existing Replit or AI-generated apps, improve the interface, fix basic issues, and make the demo easier to use.

Bug fixes
UI polish
Responsive cleanup
Demo flow improvements
Short changelog

AI FAQ Chatbot Prototype

A simple chatbot prototype that answers from your FAQ, website content, or demo knowledge base.

Chat UI
FAQ knowledge base
Mock mode
Lead capture fallback
Optional OpenAI API-ready structure

Dashboard & Reporting Tool

CSV-style data turned into KPI cards, charts, filters, and summary reports.

KPI cards
Charts
Filters
CSV/demo data
PDF/report concept

Client Portal or Admin Tool

A focused portal for project status, tasks, client notes, links, and simple business workflows.

Admin dashboard
Client/project data
Status tracking
Demo login concept
Documentation

Quote / PDF Generator

A practical tool for creating clean proposals, quotes, summaries, or PDF-style business documents.

Quote builder
Pricing summary
PDF-style preview
Status tracking
Demo data

Projects

Portfolio demos coming to arvai.dev.

Small apps that show the kind of focused business workflows I can build, polish, and hand off.

Coming soon bookingflow

BookingFlow

Booking page and mini CRM for local service businesses.

A responsive booking and mini-CRM prototype for coaches, salons, trainers, and local service providers. It shows how a small service business could replace scattered phone, email, or Messenger booking requests with a clean web workflow.

Features

Landing page
Booking form
Service selection
Admin dashboard
Booking status management
Demo customer data
Responsive UI

My role

Product planning, UI design, frontend implementation, demo data structure, workflow logic, and documentation.

Tools

Portfolio demo project. Not a production booking platform yet.

Live demo coming soon

Coming soon quotepilot

QuotePilot

Quote generator and PDF proposal tool for freelancers and small businesses.

A mini web app for creating professional client quotes quickly. It includes client details, itemized services, pricing, discount fields, quote status, and a PDF-style proposal view.

Features

Client details
Itemized quote builder
Pricing summary
Quote status tracking
PDF-style preview
Demo quotes
Responsive interface

My role

App planning, UI flow, data structure, React implementation, PDF preview logic, and handoff documentation.

Tools

Portfolio demo project. Not accounting, tax, or invoicing software.

Live demo coming soon

Coming soon askmysite

AskMySite

AI FAQ chatbot prototype for small business websites.

A portfolio prototype for small businesses that want to test an AI assistant before investing in a larger support system. It is designed around a simple knowledge base: FAQs, service descriptions, and business information.

Features

Chat interface
FAQ knowledge base
Source-style answer cards
Lead capture fallback
Admin FAQ editor concept
Mock mode for demos
Optional OpenAI API-ready structure

My role

AI workflow planning, UI design, prototype implementation, mock response logic, and documentation.

Tools

Portfolio demo project. Live AI API integration requires a scoped production setup.

Live demo coming soon

Coming soon clientroom

ClientRoom

Simple client portal for freelancers, consultants, and small agencies.

A lightweight client portal concept for tracking project status, tasks, links, and feedback in one place. It helps reduce email chaos and gives clients a clearer project experience.

Features

Demo client/admin view
Project timeline
Task list
Progress indicators
Comment section
Handoff links
Responsive dashboard

My role

Product scope, UI design, frontend build, demo content, interaction flow, and documentation.

Tools

Portfolio demo project. Authentication and file storage would need production setup for real clients.

Live demo coming soon

Coming soon reportdash

ReportDash

CSV dashboard and weekly report demo for small business data.

A dashboard prototype for small businesses that want clearer reporting without building a complex analytics platform. It turns sample sales or campaign data into KPI cards, charts, filters, and a simple weekly summary.

Features

KPI cards
Chart views
Date/category filters
CSV-style demo data
Weekly summary section
Optional PDF report concept
Responsive layout

My role

Dashboard planning, UI design, data modeling, chart implementation, and documentation.

Tools

Portfolio demo project using demo data.

Live demo coming soon

Process

Simple process, clear scope, useful output.

Scope

We define the target user, core workflow, required screens, and what should not be built yet.

Build

I create a small working version with clean UI, demo data, and the main workflow implemented.

Demo

You get a live link to test the app, review the flow, and request focused improvements.

Handoff

I provide setup notes, limitations, next-step recommendations, and clean project documentation.

About

Hi, I’m Jozsef, the builder behind Arvai Studio.

I’m an AI-assisted app builder based in Hungary, European Union. I help freelancers, small businesses, and founders turn clear ideas into small, useful web apps without turning every project into a huge software build.

My focus is practical MVPs: booking tools, dashboards, quote generators, client portals, internal tools, reporting workflows, and AI-assisted prototypes.

I work with Replit, OpenAI Codex, React, TypeScript, Tailwind, GitHub, and modern UI tools. My goal is to deliver something you can actually test: a live demo, clean interface, simple workflow, and clear handoff.

Small MVPs Dashboards Client portals AI prototypes

FAQ

Questions before we start?

What kind of projects are a good fit?

Clear, focused workflows are the best fit: small MVPs, booking tools, dashboards, client portals, admin tools, quote generators, and AI prototypes.

Do you build production-ready apps?

I specialize in focused MVPs and small web apps. For production use, I help define the next steps: authentication, security, database setup, testing, monitoring, and maintenance.

Do you use AI tools?

Yes. I use AI-assisted development tools such as OpenAI Codex and ChatGPT, combined with manual review, testing, and product thinking.

Can you work with EU clients?

Yes. I am based in Hungary, European Union, and can issue EUR invoices for EU clients. Business details are provided on invoices and project agreements.

How do we start?

Send a short description of your idea, the target user, and the workflow you want to test. I’ll suggest a small MVP scope and next steps.

Contact

Have a small app idea?

Send me the workflow you want to test, and I’ll help turn it into a focused MVP plan or working demo.

Available for focused MVP projects

Hire me on Contra

The fastest way to start a project is through Contra. Send a short description of your idea, the target user, and the workflow you want to test.

Open my Contra profile