Software Solutions

Software that keeps real businesses running.

We build our own products —GestResto, IonGest, Fideliz.Art— and custom systems for small and mid-size businesses: management, inventory, invoicing, payments and WhatsApp. Designed for the shop floor at rush hour, not for the demo.

app.gestresto.com
Screenshot of GestResto

GestResto — management panel

  • Python
  • Django
  • PostgreSQL
  • React
  • TypeScript
  • Astro
  • Flutter
  • Go
  • MercadoPago
  • WhatsApp API

3 products in production

We reply within 24h — from the person who writes the code, not a bot.

Products

Our own products, live in production

We design them, build them and run them ourselves. Each one was born from a concrete need of a real business — not from a whiteboard idea.

IonGest

In development

Modular management for retail & SMBs

Management system for businesses that sell products: accessories, apparel, supplies, tech. Sales, inventory with variants, cash register, customers, suppliers, electronic invoicing and MercadoPago payments, on the same engine already running GestResto. Assembled by modules per industry.

  • Modular per industry
  • Inventory & variants
  • E-invoicing
  • MercadoPago
  • Technical service

Fideliz.Art

Mobile app

Loyalty for local businesses

Mobile app for promotions, coupons and points. The business generates a QR, the customer scans it from the app, enters to win prizes and earns points; redemption is validated in store with another QR. White-label for premium businesses.

  • QR promotions
  • Coupons
  • Points
  • White-label
  • Android · iOS

Services

We build it for your business too

Everything we learned building our products, applied to your operation.

Custom management systems

When an off-the-shelf product isn't enough: ERPs, dashboards and workflows built around how your business actually operates, on an engine already running in production.

Integrations & automation

MercadoPago, electronic invoicing, WhatsApp with AI, thermal printers, third-party APIs. We connect what you already use.

Websites & landing pages

Fast, measurable and easy to maintain. Built to turn visitors into customers.

Mobile apps

Android and iOS with Flutter, with our own backend and admin panel.

Work

Systems that run businesses every day

Restaurant chain · Mendoza, Argentina

ñam

Gourmet food brand with 6 branches and a production center. We built and operate its website, digital menu and ñam-gestión: the ERP that handles finance, franchises, production and branches with per-company isolation.

  • Multi-company ERP
  • 6 branches
  • Franchises
  • Digital menu
Visit nam-gourmet.com

Clients who prefer not to be listed

Private projects

Inventory systems with variants, production management and custom dashboards for businesses that don't publish who they work with. Happy to tell you more on a call.

  • Inventory & variants
  • Production
  • Custom dashboards
Confidential

Process

How we work

  1. Discovery

    We understand how your business runs today and what needs to change.

  2. Design

    We define scope, screens and flows before writing code.

  3. Development

    We build in short iterations and you test from week one.

  4. Launch & support

    We ship it to production and keep it running.

Marcos Guerrini, founder of AlterMuS

About

Marcos Guerrini

Founder & developer

Self-taught developer from Mendoza, Argentina. I studied Systems Engineering at UTN but learned faster following my passion on my own. I founded AcademiaCoder, a YouTube channel that reached 30,000+ students in under a year and still has 22,000+ subscribers today. I then built and ran ñam, a 6-branch restaurant chain — including its website and its own ERP. GestResto was born from that experience, and IonGest from GestResto. AlterMuS is where all of those products live: software made by someone who has stood on the other side of the counter.

  • 30,000+ students
  • 22,000+ YouTube subscribers
  • 6 branches run on our own software
See AcademiaCoder on YouTube

FAQ

Frequently asked questions

How long does a project take?

It depends on scope, but we start from an engine proven in production and work with AI-assisted workflows, so we move fast. You get a concrete timeline after a discovery call.

How do you charge?

Custom development is quoted per project, with scope and price agreed before we start. Our products (GestResto, IonGest) run on a monthly subscription.

Who owns the code?

For custom development, you do: on delivery, the code and assets are yours. For subscription products, the data belongs to your business and you can export it any time.

Do you offer support after launch?

Yes. We run our own systems every day, so support is part of the job, not an add-on.

Can you work with my existing system?

Often yes. We assess it first and tell you honestly what's worth keeping and what's worth replacing.

Can I try GestResto or IonGest before committing?

GestResto has a 14-day free trial, no credit card. IonGest is in development: if your industry fits, you can join as a pilot business and define the modules with us.

Contact

Let's talk about your project

Tell us what you need and we'll get back to you within 24 hours.