Do The Code — Custom development

Your software.Built for you.

We build the tools your business actually needs — not the ones built for everyone.

Start a project See our work

250+ projects · 98% satisfaction · 15+ years · Buenos Aires + Valencia

project.ts

Services

One team, the whole stack.

Web

Custom web applications.

Platforms, dashboards and portals built to scale — with modern technologies.

Next.jsSvelteKitDjangoNode.js

Mobile

iOS & Android apps.

One codebase, two stores. Native-feel apps with React Native and Expo.

React NativeExpoiOSAndroid

AI systems & autonomous agents.

LLM integrations, autonomous agents, knowledge bases and intelligent automation.

ClaudeMCPpgvectorWhisper

APIs

Backends & automations.

Solid APIs, system integrations, automations that save hours every week.

PostgreSQLRedisDockern8n

We've done it

Real products, in production.

250+

Projects delivered

98%

Client satisfaction

15+

Years of experience

24h

Response time

Web platform

Metahattan

Website for selling virtual land in a Manhattan-inspired metaverse.

E-commerce + Branding

Iconiq

UX/UI and development of the speakers e-commerce, plus the brand's corporate identity.

Corporate site

Apolo Energies

Site focused on customer acquisition for renewable and sustainable energy solutions.

Institutional portal

Consulado de la Lonja

Self-managed newsletters and automated stats generation for the citrus sector.

Branding + Web

Dr. Paula Aguilar

Site that conveys the clinic's commitment to dental health and personalized care.

Landing page

EU Campaign

Promotion of local products through a campaign funded by the European Union.

E-commerce

Bellaire Fashion

Online fashion store with dynamic catalog, integrated payments and custom admin panel.

Mobile app

FitForge

Workout tracking app with personalized plans and real-time metrics.

Platform

GastroFlow

Complete online ordering system for a restaurant chain, with payment gateway and courier app.

Dashboard

DataPulse

Real-time operational metrics dashboard for a logistics company, with alerts and automated reports.

SaaS

BookEasy

Booking platform for independent professionals with calendar, payments and automated reminders.

E-learning

Aulas Plus

Online courses platform with on-demand video, assessments and auto-generated certificates.

Read the full case studies

In development

Building now.

Upcoming releases. Real products almost ready to ship.

Marina Bistro

replying · AI

Hi, table for 4 tonight?

Hi there! We have 20:30 or 21:45 — which works best?

21:45 works

In development

Dot — Lead capture assistant

AI assistant that talks to potential clients, understands their needs, estimates projects, and generates leads automatically. Built with Claude API + SvelteKit.

Claude APISvelteKitEmail automation

Claude

> publish the winter menu

✓sending…

MCP

↻ live

Sanity CMS

Winter menu

8 dishes · featured

published

In development

MCP Sanity

Connector between Claude and the Sanity CMS. Create, edit, and publish content straight from the chat — no panel required.

MCPSanity CMSClaude

Stack

The tools we master.

stack/frontend.tsx

Frontend

Interfaces that scale

Mobile

Native apps — iOS + Android

$ systemctl status

Backend

Production APIs and services

●pythonactive(running)

●djangoactive(running)

●node.jsactive(running)

●phpactive(running)

─ live ─

SELECT * FROM databases;

Data

Databases and storage

name	rows▼	load
PostgreSQL	12M
MySQL	4.2M
Redis	2.8M
PostGIS	850K
pgvector	640K

.github/workflows/deploy.yml

DevOps

Deploy and operations

pipeline:

containers:

-docker

-aws

-nginx

-ci/cd

stages:

-build

-test

-deploy

Applied artificial intelligence

Connecting your business to AI.

No generic chatbots. Systems that reason, act and solve real processes inside your operation.

> ai.agent.run()

Autonomous agents

Systems that take action on their own: read data, reason, and execute tasks without manual intervention.

✓read_inbox() → 12 emails

✓classify_intent() → done

✓respond() → 9 auto · 3 esc

Claude APITool useMulti-step

> ai.rag.query()

Knowledge bases

Your team uploads documents, manuals or policies. The model answers questions about them with precision.

policies.pdf

0.92

manual.md

0.85

faq.txt

0.78

RAGpgvectorEmbeddings

> ai.voice.listen()

Voice interfaces

Speech to text and text to speech integrated into web or mobile apps. Useful where typing is impractical.

00:03 · transcribing…

WhisperTTSMobile

> ai.mcp.connect()

MCP / Connectors

We connect AI models directly to your CRM, ERP, database or any existing API.

Claude···MCP···API

connection · open

Model Context ProtocolREST APIs

> ai.flow.execute()

Intelligent automation

We replace manual, repetitive processes with flows that reason, decide and scale.

trigger→decide→act→notify

n8n + AIWebhooksOrchestration

What clients say

Clients who trusted us.

Verified reviews on Freelancer.com.

4.9

★★★★★

★ rating

+200

Reviews

96%

On-time

98%

On-budget

→ freelancer.com/u/gutibs

★★★★★

★Featured

Gustavo is an excellent developer, highly professional and dedicated. He understands needs perfectly and delivers high-quality work. Highly recommended — I'd hire him again without hesitation.

CDMX, Mexico

Web system for asset management

Verified2 years ago

★★★★★

Very reliable and resourceful. He delivers tailored solutions.

Madrid, Spain

Database

Verified2 years ago

★★★★★

All perfect, Gustavo is a very good professional, all well!!

Castellvell del Camp, Spain

Real-time charts

Verified2 years ago

★★★★★

Very helpful in this new area for me.

Northford, USA

Online data management

Verified2 years ago

Process

Fewer steps. More focus.

Discovery

We talk about the problem. No jargon, no empty promises.

Design

Interactive prototypes before writing a single line of code.

Build

Short iterations. You see progress from day one.

Deploy

We ship it, measure it and improve it together.

Start a project

Tell us what you have in mind.

We reply within 24 business hours.