Freelance App Development

Apps that help you win more clients and sell more

Custom loyalty systems, e-commerce tools, automation, and AI-powered features — built end-to-end, from idea to launch.

See my work Start a project

Stamps

8 / 10 🎟️

API connected

AI assistant active

Deploy successful

AI Tools

Built in ✨

Services

What I build

Focused on one outcome: apps that make it easier for your business to attract and keep customers.

🎟️

Loyalty & rewards apps

Digital stamp cards and rewards systems for Apple Wallet & Google Wallet, with a dashboard to track everything.

🛒

E-commerce tools

Custom storefronts, checkout flows, and integrations that turn browsers into buyers.

⚙️

Automation & APIs

REST APIs and integrations that connect your POS, CRM, and marketing tools so nothing needs manual work.

✨

AI tools integrationNew

AI chat assistants, smart automations, and AI-assisted features built directly into your app — plus AI-accelerated development so projects ship faster.

📊

Admin dashboards

Clean, purpose-built dashboards so you can see what's working — customers, sales, and activity at a glance.

📱

Mobile-friendly apps

Fast, responsive web apps that work great on any device — no app store required.

🚀

Launch & support

From first line of code to going live online, plus a clear guide so your team can run it day to day.

🧩

Custom integrations

Wallet passes, payment providers, CRMs — if it has an API, I can connect it to your app.

Recent Work

What I've been building

A mix of live projects and work in progress — case studies are added as projects wrap up.

🎟️

In progress

Fast-food loyalty wallet system

A digital stamp card for Apple & Google Wallet with automatic reward tracking, an admin dashboard, and a REST API for POS integration.

Google WalletNode.jsReact

✨

Case study coming soon

AI-powered customer assistant

Placeholder — an AI chat assistant integrated into a client's app to answer questions and guide customers to a purchase.

AIChat

🛍️

Case study coming soon

Retail e-commerce revamp

Placeholder — swap in a real project once it ships: what the client needed, what was built, and the result.

ShopifyAutomation

📈

Case study coming soon

Booking & CRM automation

Placeholder — a project connecting a booking flow to a CRM to cut down manual admin work.

APIDashboard

Years experience

36+

Projects delivered

10k+

Satisfied clients

5★

Rating

Live Demo

Try the loyalty card yourself

This is what your customers see in their wallet: your brand, a stamp counter that updates in real time, and a QR code your staff scans at the counter.

Press + Stamp to simulate a visit — at 10 stamps the reward unlocks, exactly like the real system.

Interactive mockup shown in an iPhone frame. The production version runs on real Google Wallet passes — Apple Wallet support coming soon.

9:41100%

Wallet

cactus Dev.

Loyalty demo

Stamps

0 / 10

Reward

10 stamps to go

Member

DEMO-0001

0/10 · loyalty:DEMO-0001

Each stamp updates the card like a real wallet pass would.

Pricing

Digital loyalty program for your business

A branded loyalty card in your customers' Google Wallet, a stamp-scanning app for your staff, and a dashboard to track it all — installed, configured, and supported for you. 30-day free trial · Apple Wallet support coming soon.

Setup

One-time — everything installed for you

$890

$590one-time — launch offer

Branded wallet card (logo & colors)
Staff scan app configured
Admin dashboard set up
Team training & step-by-step guide
Live within days, not months

Get started

Standard

Everything you need to reward regulars

$49/ month per location

✓ 30-day free trial

Google Wallet loyalty cards
Digital stamps with QR scanning
Automatic reward detection & redemption
Admin dashboard & analytics
Email support
REST API for POS/CRM automation

Choose Standard

Premium

For businesses that want automation

$99/ month per location

✓ 30-day free trial

Everything in Standard
REST API for POS/CRM automation
Advanced analytics & reporting
Custom integrations (checkout, CRM)
Priority support

Choose Premium

30-day free trial on all plans — first billing after one month · Multi-location discounts from 3 locations · One-time setup applies to all plans · Apple Wallet support coming soon

Process

How a project runs

Scope

A short call to understand what "more clients, more sales" actually means for your business.

Build

I design and build the app in focused stages, using AI-accelerated workflows to move fast without cutting corners.

Launch

Deployed, tested, and live — with a plain-language guide for your team.

Support

Ongoing tweaks and support as your business (and the app) grows.

Testimonials

Client feedback

"cactus.dev nous a mis en place un programme de fidélité sur Google Wallet en quelques jours : nos clients ont leur carte dans leur téléphone, l'équipe tamponne en scannant un QR code, et on suit tout depuis un tableau de bord. Simple et efficace."

Verified feedback

"Client quote will go here once your first project wraps up."

＋ Add a real testimonial

Tools & Stack

What I build with

Including AI tools woven directly into how projects get built — and sometimes into the products themselves.

✨

AI-assisted development

Claude & other AI coding tools speed up building and testing, so projects ship faster without sacrificing quality.

🤖

AI features for your app

Chat assistants, smart recommendations, and automation — AI capabilities built into the product your customers use.

🧱

Node.js & TypeScript

Reliable, typed backends for APIs, dashboards, and integrations.

⚛️

React

Fast, modern front ends for dashboards and customer-facing apps.

🐘

PostgreSQL

Solid, auditable data storage for anything that matters — stamps, orders, customers.

☁️

Cloud deployment

Fast, reliable hosting so your app is live and stays live.

Have a project? Let's talk.

Pick a day and time that suits you — I'll call you back to discuss your project.