Description

I'm a Senior Full-Stack & AI Engineer based in Lisbon. I help startups, agencies and product teams turn ideas into production-ready SaaS platforms, AI agents, RAG systems, automation tools and web/mobile apps, fast.

I'm also a founder: I run doozle.io, my own app and game studio, where I ship consumer products end to end (apps and games with real users and revenue). I don't just write code, I own the full lifecycle: business problem, architecture, backend, frontend, AI integration, deployment and iteration after launch.

My strongest area is combining full-stack product engineering with modern AI. On the product side: React, Next.js, TypeScript, Node.js, Python, FastAPI, PostgreSQL, Supabase. On the AI side: LangChain, LangGraph, RAG pipelines, vector databases, OpenAI and Claude, tool-calling agents, multi-agent workflows and structured outputs that run reliably in production.

Recent work: Nupace (AI-first SaaS automating real-estate delinquency workflows), Mosaik.io (workflow-automation platform with custom AI agents), and AI Brain (a multi-agent system answering natural-language questions across SQL databases, CRM integrations and knowledge bases).

Typical projects I can help with:

- AI SaaS MVPs from zero to production

- LangChain/LangGraph agents and multi-agent workflows

- RAG systems over documents, databases and knowledge bases

- Internal automation tools for ops, sales, support or marketing

- Full-stack web apps with React, Next.js and TypeScript

- Python/FastAPI AI backends and Supabase/PostgreSQL architecture

- React Native and native mobile apps

- Product refactoring, performance and launch readiness

I work best directly with founders, CTOs and small teams where speed, ownership and clear communication matter. My focus is simple: ship useful software that solves real business problems.

Industry field of expertise

Languages

English
Native or bilingual
Portuguese
Native or bilingual

Workplace preferences

Remote only

Primarily works remotely

Freelancer
Senior Full-Stack & AI Engineer
DIGITAL AND IT
October 2023 - Today (2 years and 10 months)
Lisbon, Portugal
I work as a Senior Full-Stack & AI Engineer, helping startups, agencies and product teams build production-ready SaaS platforms, AI-powered applications, automation systems and mobile apps.

My work combines full-stack product engineering with modern AI architecture. I build applications using React, Next.js, TypeScript, Node.js, Python, FastAPI, React Native, SQL, PostgreSQL, Supabase and cloud services.

A major part of my recent work focuses on AI/LLM systems: AI agents, RAG pipelines, LangChain, LangGraph, structured outputs, tool-calling workflows, vector search, knowledge graphs, OpenAI, Claude and multi-step automation systems.

I usually work directly with founders, CTOs and small teams, taking ownership of architecture, backend, frontend, AI workflows, integrations, debugging, deployment and MVP delivery.

Typical projects include AI SaaS MVPs, business automation tools, internal dashboards, API integrations, RAG systems, AI agents, React/Next.js web apps and React Native mobile apps.
Fullstack LLM Python React Native AI Agent
DesignHut
Full-Stack Product Engineer
DIGITAL AND IT
May 2025 - Today (1 year and 3 months)
Boston, United States
Worked closely with DesignHut across multiple digital products, helping transform product ideas, UI/UX designs and business requirements into functional, production-ready applications.

My role involved full-stack implementation, frontend development, backend integration, API connections, technical planning, product iteration and delivery support. I collaborated closely with design and product teams to make sure the final product was not only visually aligned with the design, but also technically reliable, scalable and easy to maintain.

This experience strengthened my ability to work at the intersection of product, design and engineering, especially in fast-moving environments where the goal is to ship high-quality MVPs quickly and iterate based on user feedback.

Technologies used included React, Next.js, TypeScript, JavaScript, Node.js, APIs, SQL databases, Tailwind CSS and modern frontend/backend workflows.
Fullstack React Native AI Agents Next.js API REST
Freelance
AI Engineer — Multi-Agent Systems & RAG
DIGITAL AND IT
January 2025 - May 2026 (1 year and 4 months)
Dallas, United States
Worked on AI Brain, a multi-agent AI system for intelligent database queries powered by Python, FastAPI, LangGraph and LangChain.

The platform enabled users to ask natural-language questions across multiple data sources, including SQL databases, CRM integrations and knowledge bases. The system used a supervisor/specialist-agent architecture, with agents responsible for SQL queries, integration queries, RAG knowledge-base answers, workflow execution and conversation routing.

My work involved building AI workflows, tool-calling logic, structured parameter extraction, RAG pipelines, vector search, async processing, retries, fallbacks, timeouts and production-oriented backend patterns.

Technologies included Python, FastAPI, LangGraph, LangChain, Celery, Redis, Pinecone, OpenAI models, SQL, Pydantic-style schemas and API integrations.

This project is a strong example of my ability to build practical AI systems that go beyond simple prompt engineering and operate as real business logic inside a production application.
Python Agentic AI