Freelancer profile translated to English.

Description

Product Engineer and Fractional CTO. I have over 15 years of experience building digital products that work after launch.

I work on three fronts that typically require three different vendors, under a single responsibility:

Applied AI — conversational agents, RAG, and semantic search in production, not PoCs.

Custom SaaS — web platforms with their backend, admin panel, and integrations that the business truly needs.

Native mobile apps — iOS (Swift/SwiftUI) and Android/Flutter.

How I work: I understand the business before choosing the stack, I use the minimum technology for the result, and I build in 2-week iterations with the product in your hands from the start. I tell you what works, what doesn't, and what's out of scope — not just what's in.

I'm a good fit if you need a fractional CTO to bring technical order, implement AI where ROI is measured in weeks, or launch a SaaS or app that's getting stuck.

Shall we talk about your case? Tell me what you're trying to solve and I'll frankly tell you how I'd approach it.

Languages

English
Conversational
Spanish
Native or bilingual

Workplace preferences

Remote only

Primarily works remotely

PropPilot.ai
Fractional CTO & AI Engineering Lead
REAL ESTATE
June 2026 - Today (1 month)
Ourense, Spain
Technical lead for PropPilot, an AI-native multi-tenant SaaS platform for real estate and property management.

End-to-end architecture and development of the solution: an AI conversational agent based on FSM with cost-aware model routing, integrated into an omnichannel communication layer.

Implementation of observability and complete LLM system evaluation: tracing with Langfuse, prompt versioning, and quality metrics to ensure reliable agent behavior in production.
CTO as a Service AI Agents B2B SaaS LLMs System Integration
Docastix
Founder & CEO
SOFTWARE PUBLISHING
September 2024 - Today (1 year and 10 months)
Specializing in building AI products for startups and companies that want to turn LLM ideas into real products.

As a Fractional CTO, I lead the technical architecture and AI engineering decisions for scaling clients, focusing on production-ready LLM systems: observability, evaluation, and engineering discipline versus "vibecoding".

Main stack: Next.js, Supabase, n8n, Anthropic API, OpenAI.

I have led the end-to-end development of multi-tenant SaaS, FSM-based conversational agents, and observability pipelines with Langfuse.

Managing technical teams, mentoring junior profiles, and direct interaction with product CEOs and CTOs.
Team Management Technical Direction AI Software Architecture
Adevinta
Senior iOS Developer
REAL ESTATE
October 2021 - May 2026 (4 years and 7 months)
Barcelona, Spain
Senior iOS Developer in the Real Estate sector, developing the Fotocasa and Habitaclia apps. Architecture, performance, and code quality in a product with millions of active users. Working on search, geolocation, and user experience features in Swift/SwiftUI.
iOS Swift SwiftUI KMM Kotlin