Hi, I'm Alejo Marinsalda
Full Stack Developer | AI Engineer
Full Stack Developer & AI Engineer experienced in building end-to-end products — from scalable backend APIs to responsive frontend interfaces. I design AI-powered systems and production-ready architectures that prioritize performance, data integrity, and long-term scalability.
Full Stack Developer | AI Engineer
Full stack developer with a strong focus on AI systems — agentic pipelines, retrieval-augmented generation, and the cloud infrastructure that supports them. I build complete products end-to-end: from backend APIs and data layers to the frontend interfaces users actually interact with.
I work at the intersection of software engineering and applied AI, turning language model capabilities into reliable, production-ready products. I take ownership of the full picture — system design, deployment, and everything in between.
Outside of engineering, I'm genuinely interested in the science of energy and performance — sleep, nutrition, training, focus. Not as a productivity hack, but because I find it fascinating how everything compounds: better sleep sharpens thinking, consistent training builds discipline, and that discipline shows up in the work.
I approach self-improvement the same way I approach systems — iteratively, with curiosity, and with an eye on what actually moves the needle.
Tech stack
Backend
- Python
- FastAPI
- Node.js
- PostgreSQL
- Pandas
Frontend
- React
- TypeScript
- Tailwind CSS
- Vite
AI / LLM
- LangChain
- LangGraph
- OpenAI API
- Anthropic Claude
- Google AI
- RAG Pipelines
- Vector DBs
- Prompt Engineering
- Fine-tuning
- LangSmith
Infrastructure
- AWS
- Docker
- Kubernetes
- CI/CD
- GitHub Actions
Tools
- Git
- System Design
- Agile / Scrum
- Code Review
- Technical Docs
Live apps
All projects →NomadAI
A chatbot that helps you choose your next ideal destination as a digital nomad, taking into account your hobbies, monthly budget, goals, visa requirements based on your nationality, and more.