# Paulo Riveiro — Full-Stack & AI Engineer

> Paulo Riveiro is a Senior Full-Stack Engineer, AI Specialist, and Multi-Cloud Architect (GCP ACE Certified) specializing in React, Node.js, Python, Flutter, LangChain/LangGraph AI agents, RAG architectures, and scalable cloud systems.

## Professional Summary
- **Role**: Full-Stack & AI Engineer / Multi-Cloud Architect
- **Website**: https://www.pauloriveiro.com
- **GitHub**: https://github.com/DrowLink
- **LinkedIn**: https://www.linkedin.com/in/pauloriveiro/
- **Email**: paulo.riveiro@gmail.com
- **Availability**: Open for high-impact Full-Stack, AI integration, and Cloud architecture roles (Remote / Global).

---

## Core Competencies & Tech Stack

### 1. Front-End & Mobile Engineering
- **Languages & Frameworks**: React.js, Next.js (SSR, App Router), TypeScript, JavaScript (ESNext), Flutter & Dart, Tailwind CSS, Vite.
- **Mobile Development**: Cross-platform iOS and Android apps with Flutter, Clean Architecture, BLoC pattern, Google Maps SDK, offline storage, App Store & Google Play deployments.
- **UI/UX**: Design systems, Responsive Layouts, Dark UI, Glassmorphism, Micro-animations.

### 2. Back-End, APIs & Databases
- **Languages & Frameworks**: Node.js, Express.js, Python (FastAPI, Flask, Django), PHP / Laravel.
- **Architecture**: RESTful APIs, Microservices, JWT Auth with Refresh Tokens, RBAC, Zod validation, Repository Pattern, Rate Limiting, Server Caching.
- **Databases**: PostgreSQL, Microsoft SQL Server, Supabase (Postgres RLS, Edge Functions), MariaDB, Firestore, Prisma ORM.

### 3. AI Engineering & Agent Orchestration
- **Frameworks & Tooling**: LangChain, LangGraph, RAG (Retrieval-Augmented Generation), Vector Embeddings, n8n Workflow Automation.
- **LLM Integrations**: OpenAI GPT-4o, Google Gemini, Anthropic Claude, Type-Safe Structured Outputs (`llm_schema`).
- **Use Cases**: Autonomous business agents, smart CRM assistants, automated document querying, dynamic marketing content generation.

### 4. Multi-Cloud, DevOps & Infrastructure
- **Cloud Providers**: Google Cloud Platform (GCP - Certified Associate Cloud Engineer), Amazon Web Services (AWS), Microsoft Azure.
- **DevOps & Containers**: Docker, Kubernetes (GKE), Terraform (IaC), Cloud Run, Cloud Functions, Linux VMs, Bash Scripting, Nginx.
- **CI/CD**: GitHub Actions, automated test suites (Jest, Supertest), App Store Connect & Google Play Console pipelines.

---

## Flagship Projects & Case Studies

### 1. Cometinfo.com
- **Category**: AI Lead Capture & Real-Time Analytics Platform
- **URL**: https://cometinfo.com
- **Stack**: React.js, Next.js, Node.js, Supabase, Tailwind CSS, REST APIs.
- **Key Metrics**: Real-Time AI Lead Sync, +40% post-event conversion boost.

### 2. Freeela.app
- **Category**: Local Business Discovery Platform & AI Content Creation (Australian Market)
- **URL**: https://freeela.app
- **Platforms**: Apple App Store, Google Play Store, Progressive Web App.
- **Stack**: Flutter, React.js, Express.js, Google Cloud Platform, Geolocation Engine, AI Video Generation.

### 3. JD System Aviation
- **Category**: Executive Aviation Jet Fuel Dispatch & Payment Portal
- **Stack**: Flutter, Dart, Microsoft SQL Server, Real-Time In-App Chat, REST APIs.
- **Key Features**: Live fuel consumption telemetry, executive analytics dashboard, payment reconciliation, operational chat between flight crew and dispatchers.

### 4. Small Footprint App
- **Category**: Carbon Footprint Estimation & US Seasonal Produce Recommender
- **Stack**: Flutter, FlutterFlow, Cloud Storage, Real-Time Sync.
- **Key Features**: Personal carbon footprint calculation, climate zone seasonal recipe matcher.

### 5. Production Node.js & Express REST API Boilerplate
- **Repository**: https://github.com/DrowLink/node-rest-api-boilerplate
- **Stack**: Node.js, Express.js, TypeScript, JWT (Refresh Token Rotation), RBAC, Zod, Jest, Supertest, Docker, Swagger/OpenAPI.

### 6. Customer Churn MLOps with Scikit-Learn (B2B SaaS)
- **Repository**: https://github.com/DrowLink/customer-churn-mlops-sklearn
- **Stack**: Python, Scikit-Learn, MLOps, Pydantic, Pandas, Parquet, Pytest, Ruff.
- **Key Features**: Custom financial business scorers (saved MRR vs. intervention cost), leak-free pipelines, probability calibration, SHA-256 artifact governance, online/batch inference.

---

## Professional Services

1. **Full-Stack Web & SaaS Platform Engineering**:
   - Modern React/Next.js frontends, scalable Node.js/Express and Python backends, PostgreSQL/Supabase databases, Stripe payment integrations.
2. **AI Integration, LangChain & Autonomous Agents**:
   - Production-ready RAG architectures, custom agentic workflows with LangGraph, structured schema outputs for LLMs, n8n automated pipelines.
3. **Multi-Cloud Architecture & DevOps (GCP · AWS · Azure)**:
   - High-availability VPCs, Linux VM provisioning with high-throughput caching, containerization with Docker/K8s, CI/CD automation.
4. **Cross-Platform Mobile Engineering (Flutter & Dart)**:
   - High-performance iOS and Android mobile apps with Flutter, legacy AppSheet modernization (up to 70% load time reduction), store publication.

---

## Certifications & Credentials
- **Google Cloud Certified Associate Cloud Engineer (GCP ACE)** — Google Cloud
- **Google Cloud Essential Infrastructure Accreditation** — Google Cloud
- **Google Cloud Skill Badges** (17 Badges including Terraform IaC, GKE, Cloud Run, AI Infrastructure) — Google Cloud
- **Full-Stack Developer Bootcamp Certification** — 4Geeks Academy

---

## Contact & Direct Inquiries
- **Email**: paulo.riveiro@gmail.com
- **Website**: https://www.pauloriveiro.com
- **LinkedIn**: https://www.linkedin.com/in/pauloriveiro/
- **GitHub**: https://github.com/DrowLink
- **Location**: Remote (Americas / Global)