Description

I build production software. Not prototypes, not MVPs that die in staging — apps that ship to the App Store and Google Play, serve real users, and stay maintained.

I've been doing this for 10 years. My core is mobile: Flutter and React Native for iOS and Android. But I genuinely cover the full stack — backend in Laravel or Node.js, web front-end in React or Astro — without subcontracting the parts that need connecting.

Since 2024, I work AI-native. That means a RAG in production for an app with tens of thousands of active users, an on-device AI engine that runs entirely on the phone without any external API, and an autonomous multi-agent pipeline for real-time monitoring and structured delivery. Not planned features —running systems.

I work well with non-technical founders. I make architecture decisions, explain trade-offs without jargon, prioritize around the business, and get a product live without accumulating unnecessary technical debt. If you need one engineer who owns

the whole thing — I do that.

Tell me what you want to build.

Industry field of expertise

Languages

Spanish
Native or bilingual
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

Freelance
Software Engineer
May 2022 - Today (4 years and 2 months)
Jaen, Spain
Worked across multiple parallel client and personal projects as sole technical
lead — mobile, backend, and AI — owning the full cycle from architecture to production.

Core pattern across all engagements: one engineer covering the complete stack. Flutter and React Native for iOS and Android, backend in Laravel or Node.js, web front-end in React or Astro. No handoffs, no subcontractors.

Fractional CTO work for early-stage startups: architecture decisions, stack evaluation, trade-off analysis, and technical roadmap alongside non-technical founders. Ongoing advisory role in production AI systems for a startup with active users.

AI integration since 2024 — production work, not experiments:
· RAG pipeline with LLM in production (retrieval, caching, context management)
· On-device AI inference in a mobile app — no cloud API, fully private
· Autonomous multi-agent pipeline for monitoring and structured delivery

8+ apps shipped across health, real estate, education, and sustainability —
each from first architecture decision to App Store and Google Play.
Tech Lead Mobile Applications Flutter Desarrollo Full Stack Clean Architecture
Rosita Longevity (Hearts Radiant)
Product Engineer
EDUCATION AND E-LEARNING
March 2022 - June 2023 (1 year and 3 months)
Valencia, Spain
Architected and implemented robust mobile app designs to deliver exceptional user experiences.
Took ownership of implementing new features, leading successful outcomes.
Implemented a comprehensive end-to-end testing suite, covering critical user flows, to ensure the app's stability and reliability across different devices and platforms.
Mentored and supported junior developers, enabling them to make meaningful contributions to the team's productivity.
Mobile Applications Flutter React.js Typescript Mentoring
Signa Sports United
Software Engineer
E-COMMERCE
September 2020 - December 2021 (1 year and 3 months)
Barcelona, Spain
Redesigned and implemented robust mobile apps for optimal user experiences, driving high engagement and retention rates.
Led the implementation of new features, delivering successful outcomes on time and within budget.
Introduced a testing layer and optimization techniques to identify and resolve bottlenecks, resulting in improved app responsiveness and reduced loading times.
Mentored and coached junior developers to cultivate a strong team culture, resulting in improved productivity and quality standards.
Flutter Kotlin Swift Testing Clean Architecture