About
Hi, I'm Rubén.Most of the internet knows me as zShuck.

I'm a software AI engineer and product engineer from Barcelona. These days I spend most of my time putting AI agents into production with Claude and Gemini and turning them into products people actually use.
I also care about what happens after launch: funnels, conversion, leads, the numbers that tell you whether something works. And I work hand in hand with product designers and brand designers, so a project can go from brand to product to growth with one team.
I started at Keenfolks, building web projects for clients like MSD, Royal Canin, Ogilvy and Coca-Cola, and ended up leading the web development team as tech lead. Then I joined Factorial to work on HR software at scale. Working with international teams taught me to adapt fast to different cultures and ways of working.
Outside work I lose too many hours to strategy games and RPGs, train, and keep automating my flat. I like my software fast, honest and a little bit orange.
The story so far
Ch. 01
4Geeks Academy
Full stack developer bootcamp and certification.
Ch. 02
Keenfolks
Web developer, then tech lead of the web development team. Projects for MSD, Royal Canin, Ogilvy and Coca-Cola.
Ch. 03
Factorial
Software engineer on an all-in-one HR platform.
Ch. 04
Now
Software AI engineer and product engineer. AI agents in production, growth, and the products around them.
Character sheet
Player stats
- Class
- Software AI Engineer
- Subclass
- Product Engineer
- Multiclass
- Growth engineer
- Party
- Product & brand designers
- Base
- Barcelona
- Languages
- Español · Català · English
- Alignment
- Chaotic orange
- Teamwork
- Creative
- Organised
- Team management
- Always learning
- Strategy & RPG games
- Home automation
- Training
Passive skills
Side quests
Inventory
AI
- Claude
- Gemini
- OpenAI
- Claude Code
- AI agents
- Multi-agent systems
- Tool use
- MCP
- RAG
- Evals
- LLM integrations
Frontend
- React
- Next.js
- TypeScript
- Tailwind CSS
- SvelteKit
- Vite
- CSS-in-JS
Backend
- Node.js
- Express
- Ruby
- Python
- Django
- Flask
- .NET (C#)
- GraphQL
- Apollo
- OAuth 2
Data
- PostgreSQL
- MongoDB
- Redis
- RabbitMQ
- SQL
- TypeORM
Cloud & DevOps
- AWS
- GCP
- Azure
- Docker
- Terraform
- Nginx
- CI/CD
- Git
Growth
- Funnels
- CRO
- A/B testing
- Lead generation
- CRM integrations
- Analytics
- SEO
- GEO
Quality & reach
- Cypress
- Unit testing
- Core Web Vitals
- Accessibility
Achievements unlocked

Full Stack Developer
4Geeks Academy

Introduction to Cloud
IBM
View certificate ↗

From JavaScript to TypeScript
Codely

Clean Code
Udemy
View certificate ↗

Problem Solving (Basic)
HackerRank
View certificate ↗
Off the clock
From the camera roll
FR 01Flash, film, no retakes.
FR 02Behind the lens for once.
FR 03Somewhere between buildings.
Got an idea?
Let's build something with personality.
Agents, products, funnels, a whole brand or a weird experiment. Tell me about it.