Gandev.dev
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Available for work

Hi, I'm Gustavo Cev

Software
Developer

Transforming ideas into powerful and reliable digital solutions with cutting-edge backend development.

Umbral AI Soon
Agents & Workflows Soon

What I do

Backend & APIs
Backend & APIs
NestJSNestJSNode.jsNode.jsTypeScriptTypeScriptDDD / HexagonalRabbitMQREST APIs
Databases & Data
Databases & Data
PostgreSQLPostgreSQLMySQLMySQLSnowflakeMetabaseDockerDockerAWS EC2/RDSAWS EC2/RDS
AI & Automation
AI & Automation
LLM APIs / MCPn8nn8nPythonPythonAI AgentsAI AgentsWhatsApp API
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Career

Experience & Skills

Jan 2026 — Present Current

Backend Developer & AI Engineer

Gandev / Sumaq

Mobile app for client management + AI and MCP-powered appointment automation. SaaS-ready architecture designed for multi-sector scaling.

  • Modular NestJS + PostgreSQL API with multi-tenant design and logical isolation
  • React Native frontend connected to the API for booking and client management flows
  • Intelligent scheduling automation with slot proposals and AI-driven workflows
  • MCP integrations and LLM orchestration for autonomous appointment handling
Sep 2023 — Oct 2025

Backend Developer

Clasing ↗

E-learning platform covering payments, video calls and AI-powered dashboards. Full ownership of critical backend systems.

  • PostgreSQL reporting optimization through query tuning and data access refactoring — feeding Metabase and Cube BI dashboards
  • RabbitMQ + gateway for wallet transactional flow — reduced errors and improved consistency
  • Full backend for the exercise system: submission, automated grading, explanations and FUNDAE legal compliance
  • Support ticket system reducing average resolution time from ~10 min to ~3 min (~70% faster)
  • Deployed ARI: AI assistant with real-time conversation analysis, REST API and n8n automation workflows
  • NestJS + TypeScript with DDD and Hexagonal architecture — full project ownership and technical decision-making
Jan 2021 — Sep 2023

Web Developer

SMBs / Freelance

Web design and development for small and medium businesses across Spain using Astro + React + Tailwind, with AI content and SEO integrations.

  • Phonetec.es — Tech repair services booking platform (Vercel, Deployed)
  • PaulaNails.es — Beauty salon appointment system (Vercel, Deployed)
  • HeladeriaRoma.com — Interactive restaurant & menu site (React + Deno)
  • DevOps and infrastructure management, analytics and SEO tooling

Backend

NestJS NestJS Node.js Node.js TypeScript TypeScript Python Python RabbitMQ DDD / Hexagonal

Databases & Data

PostgreSQL PostgreSQL MySQL MySQL MongoDB MongoDB Snowflake Metabase Redis

DevOps & Cloud

Docker Docker Git Git AWS EC2 / RDS AWS EC2 / RDS Linux / Bash Linux / Bash CI/CD Vercel Vercel

AI & Automation

n8n n8n AI Agents AI Agents LLM / MCP LangChain WhatsApp API

My work

Projects

UMBRAL.AI
On Development
Remote Server Remote Server

UMBRAL.AI

AI-powered platform for intelligent decision-making and automation workflows with machine learning integration.

Python
Python
Node.js
Node.js
PostgreSQL
PostgreSQL
Docker
Docker
AI Agent
AI Agent
Code In Progress
Sumaq.es
On Development
Remote Server Remote Server

Sumaq.es

Modern e-commerce platform with advanced inventory management and real-time analytics for retail business.

Astro
Astro
React
React
Tailwind CSS
Tailwind CSS
Node.js
Node.js
MongoDB
MongoDB
Code In Progress
Phonetec.es
Deployed
Vercel Vercel

Phonetec.es

Professional tech repair services website with online booking system and customer management dashboard.

Astro
Astro
React
React
TypeScript
TypeScript
Tailwind CSS
Tailwind CSS
Code Live
PaulaNails.es
Deployed
Vercel Vercel

PaulaNails.es

Beauty salon booking platform with appointment scheduling, service catalog, and client portfolio management.

Astro
Astro
React
React
TypeScript
TypeScript
Tailwind CSS
Tailwind CSS
Code Live
HeladeriaRoma.com
Deployed
Vercel Vercel

HeladeriaRoma.com

Ice cream shop website with an interactive menu, online ordering system, and location-based store finder.

React
React
Deno
Deno
Tailwind CSS
Tailwind CSS
Code Live
More on GitHub

What's next

Coming Soon

Features I'm actively building — live demos of what I do, not just descriptions.

Soon

AI Agent — Live Demo

An interactive chat connected to my own API — real-time AI agent you can talk to, right here in the portfolio.

Groq APINestJSStreamingLangChain
What's your backend stack?
NestJS, PostgreSQL, Redis...
Soon

Own Contact API

Replacing Formspree with my own webhook endpoint — NestJS + rate limiting + email queue. Consistent with the backend profile.

NestJSNodemailerRate LimitingQueue
POST /api/contact
200 OK — Message queued
Soon

Technical Blog

Short articles about what I actually build — NestJS patterns, PostgreSQL tricks, AI integration lessons. Astro MDX, zero config.

Astro MDXPostgreSQLNestJSAI
Optimizing PostgreSQL for BI with Metabase
Building AI agents with LangChain + NestJS

Let's talk

Contact

Have a question or a project in mind? Feel free to reach out.

Location: Madrid, Spain