01
Backend & REST APIs
ASP.NET Core endpoints, auth, business rules and OpenAPI docs. The solid part nobody sees, built to be maintained.
$ GET /api/orders?status=pending
→ 200 OK · 12 orders · 38 ms
Custom systems studio · Argentina
Software thatconnectsyour business.
We design and build custom systems end to end: the screens your team uses, the web app, the backend, the APIs and the integrations behind it. You talk directly to the people who build it.
- Experience
- 4 years
- Projects delivered
- 30+
- Languages
- EN · ES · PT
- C#
- .NET
- ASP.NET Core
- React
- Next.js
- TypeScript
- PHP
- Flutter
- PostgreSQL
- SQL Server
- Redis
- Docker
- n8n
- REST APIs
- Webhooks
- OpenAI
- Mercado Pago
- WhatsApp API
What we build
From the screen to the server. All of it.
We design the process, the interface and the data, then build every layer. Pick one service or the whole system.
02
Front-end & web apps
React and Next.js interfaces, dashboards and portals that are fast, responsive and easy to use.
03
Integrations & automation
Payments, webhooks, WhatsApp, CRMs and n8n flows. Systems that talk to each other, with retries and logs.
- Webhook in→
- Verify signature→
- Update order→
- Notify customer
04
Custom systems, end to end
We map your process, design the screens and build the full system: front-end, back-end, database and deployment.
- ✓Process & screens
- ✓Front-end
- ✓Back-end & database
- ✓Roles & permissions
- ✓Deployment
Try it
Send the same payment twice.
Payment providers retry webhooks. A careless integration charges or ships twice. Press the button as many times as you want and watch what a well-built one does.
POST /webhooks/paymentsOrder #1042 · $0 paid
- · Waiting for payment.approved · order #1042
Work
Real systems, real screens.
Client names are kept private. Screens use demo or sample data.
Process
From requirements to reliable software.
The same six steps for a two-day fix or a three-month system.
- 1
Discover
You tell us the goal, the current process and what is slowing you down.
- 2
Design
A written scope plus the screens and flows, so you see the system before we build it.
- 3
Build
Front-end and back-end in short iterations you can see. Every change gets a second review.
- 4
Test
Every requirement gets a reproducible check. You get the evidence.
- 5
Deliver
Source code, setup guide, release notes and a walkthrough.
- 6
Improve
Agreed fix window, then new modules or maintenance if you need them.
Team
No middlemen.
Four years of experience and more than 30 projects designing and building custom systems for companies and our own products. You talk to the people who build your system, and every line gets a second review.
EG
Enzo Gaido
Full-stack · architecture & integrations
Designs the architecture and builds complete systems: React and Next.js front-ends, .NET backends, REST APIs, integrations and n8n automation. Owns the parts that must never break.
- C# / .NET
- ASP.NET Core
- React / Next.js
- SQL
- n8n
- Flutter
JG
Jazmín Gaido
Systems analyst · front-end & UI
Systems analyst who turns messy processes into clear modules, screens and flows, then builds the interfaces. Leads discovery, UI and client calls in English (C1).
- Process analysis
- UI design
- React / TypeScript
- PHP
- SQL / PostgreSQL
- English C1
FAQ
Before you ask.
No. We design and build the whole system: process, screens, front-end, back-end, database, integrations and deployment. You can also hire just one layer.
Tell us what you need.
Send the goal, your current tools and a rough timeline. We answer with questions or a scoped proposal, not a template.