Hi, I'm
Artur Guerra
Full Stack Developer & Product Builder
I build real products end-to-end — from architecture to deployment — with AI, automation, and intelligent integrations woven into every layer.
Engineering meets product vision
I'm a Full Stack Developer and Information Systems student at CEFET/RJ, focused on building complete systems that solve real business problems. Currently a Full Stack Development Intern at Visol, working with PHP and Angular, where I integrated the franchise hub with the company's core platform.
I don't just write code — I build products. Every project I take on is approached with a product mindset: understanding the domain, designing for scale, and shipping features that create real impact. I've built multi-tenant SaaS platforms, healthcare systems, sports management tools, and gaming platforms — all from scratch.
What sets me apart is the practical integration of AI into real systems: OCR pipelines, multi-provider LLM chains with fallback, intelligent agents, and automated workflows that run in production — not demos.
What I build
Full Stack Engineering
End-to-end development with Python, FastAPI, Flask, React, Next.js, and TypeScript. From database design to responsive UIs.
Systems Architecture
Multi-tenant SaaS, Clean Architecture, async-first backends, role-based access control, and production-grade infrastructure with Docker.
Applied AI
Multi-provider LLM integration (OpenAI, Claude, Gemini) with fallback chains, OCR pipelines, and AI-powered data extraction in production systems.
Agents & Automation
Celery-driven background jobs, scheduled tasks, real-time sync pipelines, push notification systems, and intelligent workflow orchestration.
API & Integrations
Google Ads, Meta Graph API, Firebase, OneSignal, football-data.org, SharePoint, ANVISA — deep third-party integration experience.
SaaS & Product Development
From MVP to production: multi-tenant architectures, payment flows, analytics dashboards, onboarding systems, and user retention mechanics.
Featured work
EvoSolar Franquias
AISolar Energy · SaaS
Multi-tenant franchise management platform for solar energy companies. Manages onboarding, KPI tracking, royalty calculations, ad campaigns, and internal communication across franchise units.
Stack
Highlights
- 34 backend modules with 83k+ lines of code
- Google Ads & Meta API integration with OAuth
- Google Gemini AI agents for conversational intelligence
- WebSocket real-time chat with SLA tracking
- Automated royalty calculations and financial sync
Solo Creator & Developer
Zelo App
AIHealthTech · SaaS
Medication management platform for families with elderly and chronic patients. Centralizes drug scheduling, caregiver coordination, dose tracking, stock management, and adherence analytics.
Stack
Highlights
- Multi-provider AI chain (OpenAI, Claude, Gemini) with automatic fallback
- OCR medication extraction enriched with ANVISA drug catalog
- Timezone-aware scheduling for multi-caregiver coordination
- 38 specialized API endpoints across 15 service domains
- LGPD compliance architecture with encryption and audit trails
Solo Creator & Developer
Fantasy Picks
Sports & Gaming · SaaS
Fantasy sports platform with survivor-style pick mechanics. Users purchase picks to enter real football championships, select teams weekly, and compete for prizes based on match results.
Stack
Highlights
- Async-first architecture with asyncpg for high concurrency
- Pick lineage tracking with complex business rule validation
- football-data.org integration for real-time match data across 12+ leagues
- Dual-balance wallet system (picks + prize BRL)
- Clean Architecture with repository pattern and service layers
Solo Creator & Developer
BR1 Sports Academy
Sports Management
Comprehensive sports academy management system handling the complete lifecycle of young athletes — from initial interest through advanced training with multi-role staff coordination.
Stack
Highlights
- Six-level role-based access (admin, coach, doctor, psychologist, trainer)
- Automated PDF generation and merging pipeline for player reports
- Bioimpedance integration with advanced body composition metrics
- Interested-to-athlete CRM pipeline for prospect management
- 17k+ lines of production Python
Solo Creator & Developer
Cesh
AIEducation · Social Platform
Academic social network for CEFET students. Centralizes institutional data (schedules, grades, directory) into a modern platform with social features and intelligent portal synchronization.
Stack
Highlights
- Zero-credential portal sync via browser extension and userscript
- GitHub Copilot Chat integration with OAuth Device Flow
- Adaptive CSS/XPath selectors that auto-recalibrate on portal changes
- Privacy-first architecture with granular data revocation
- 190+ PHP files with PSR-4 namespace structure
Solo Creator & Developer
Pecci Cuidado Integrado
HealthTech · Clinic Management
Clinical management platform for healthcare professionals. Enables data storage, appointment management, and patient evolution tracking for an integrated care clinic.
Stack
Highlights
- Full appointment and patient evolution management
- Professional-focused data management interface
- Deployed and running in production
Freelance Developer
AI that ships in production
I integrate AI where it creates real value — not as a buzzword, but as a core system capability that solves actual problems.
Multi-Provider LLM Chains
Production systems with OpenAI, Claude, and Gemini integration featuring automatic fallback, token tracking, and prompt caching for reliability and cost optimization.
OCR & Document Intelligence
Computer vision pipelines that extract structured data from medication labels, enriched with ANVISA catalog matching for accuracy validation.
Conversational AI Agents
Google Gemini-powered agents with tool-use capabilities, stream-based responses, and circuit breaker patterns for graceful degradation.
Intelligent Automation
Celery-driven workflows: ad metrics sync every 30 minutes, SLA breach detection every 5 minutes, nightly royalty calculations, and automated CRM synchronization.
AI-Assisted Development
GitHub Copilot Chat integration via OAuth with context-aware prompt building, conversation persistence, and rate-limited access control.
Image Generation
fal.ai integration for on-demand image generation within SaaS platforms, enabling visual content creation as part of business workflows.
Domains I've built for
HealthTech
Medication management with AI-powered OCR, clinic management systems, and LGPD-compliant patient data architecture.
Solar Energy
Multi-tenant franchise management with automated royalty calculations, ad campaign orchestration, and financial sync.
Sports & Gaming
Fantasy sports SaaS with real-time match integration, and academy management with multi-role athlete tracking.
Education
Academic social platform with intelligent portal synchronization, AI chat integration, and privacy-first data architecture.
Enterprise SaaS
Production-grade multi-tenant platforms with role-based access, real-time communication, and automated business workflows.
Let's build something together
I'm open to new projects, opportunities, and collaborations. Whether you need a full product built from scratch or AI integrated into your existing systems.
arturpvguerra@gmail.com