Solutions for growing businesses.
Complete web platforms with authentication, dashboards and integrations to scale your business.
100% automated stores with catalog, optimized checkout, payment and advanced logistics integrations.
Marketing process automation, system integrations, AI-powered features and elimination of repetitive tasks.
Integration with AI models, chatbots, intelligent automations and data analysis to optimize processes and customer service.
RESTful API development and custom integrations between systems, connecting ERPs, CRMs, payments, apps and external services.
Native and hybrid apps for iOS and Android focused on performance, usability and full integration with your existing system.
Simplicity and efficiency.
Clear definition of goals, scope and architecture. Technology choices aligned with the business and preparation of the execution roadmap.
Implementation focused on quality, performance and scalability. Clean code, testing and best practices from day one.
Secure deployment, final validations and optimizations. Guaranteed stability and readiness for production use.
Continuous monitoring, fast fixes and system evolution. Ongoing assistance to maintain performance and reliability.
Numbers from someone who has delivered a lot.
APIs, integrations and workflows between systems.
High conversion, clean code and performance.
Real-time data on traffic, sales, operations and any business metric.
Programmed and integrated into real systems.
Robust, high-performance and adaptable.
Full-Stack systems in production generating real revenue.
Delivery with results.
I develop systems, applications, automations, artificial intelligence agents, platforms and online stores with an exclusive focus on the healthcare sector. Working with companies in this space since 2020, I understand the market's specific needs and deliver digital solutions that truly work for this audience.
From the first commit to the production deploy, every technical decision is made with the client's business in mind. Clean code, solid architecture and fast delivery without sacrificing quality.
Build software that solves real problems and generates measurable value for the business.
To be a reference in digital development in healthcare, delivering solutions with solid technology.
Full transparency throughout the process, deadlines met and direct communication from start to finish.
Fast delivery cycles without sacrificing robustness. From MVP to final product with agility.
"Every project is treated as if it were my own business."
Guilherme Montenegro
Software Engineer
Featured projects.
Recurring subscription SaaS that integrates clinical AI into the real clinic workflow — from patient management to generation of probable diagnoses, with dynamic forms, per-patient sessions and PDF export. Speed and security from start to finish.
Highlights:
Recurring subscription with automatic card billing
Patient and individual session management with AI
Responses automatically shared with the AI
PDF report export
Generation of probable diagnoses and guidance for physicians
Pre-programmed forms with password-protected public link
Custom logistics management system integrated with Emellus Nutracêuticos' e-commerce platforms — controlling inventory, shipments, tracking and customer communication, from order receipt to delivery.
Highlights:
Integration with e-commerce platforms
Real-time inventory control and updates
Carrier label generation
Tracking and status updates to the customer
Returns, reshipments and invoice management
Photo and proof-of-delivery uploads per operation
E-commerce built on Shopify with fully custom theme and widgets — bundle system, volume discounts, integrated customer support and automated order management from checkout to fulfillment. Inventory synced in real time with Olist ERP, WhatsApp and fulfillment integrations.
Highlights:
Custom theme and widgets
Bundle system and volume discounts
Automated order management
Olist ERP integration and inventory sync
WhatsApp integration for customer support and notifications
Integration with fulfillment center
Built with an absolute focus on speed and conversion — fast loading even on old phones with 3G internet, form available immediately in the load order and instant data processing. Every detail of performance, design and tracking is applied to maximize results on both paid and organic traffic.
Highlights:
Perfect Lighthouse/PageSpeed score with optimized loading for Mobile/3G
Form active on First-Paint with instant processing
Normalized data (name, email and phone) with proper local format validation
Advanced tracking for GA4, Meta Ads, TikTok Ads and BIs
Integration with webhooks, CRMs, email marketing and WhatsApp marketing
Browser and Server events with user matching
Automatic redirect to WhatsApp groups
Heatmaps, parameter forwarding, UTMs and URL preservation
Boosts organic results beyond paid traffic
Turn your projects into reality.
Whether you have a well-defined project — or are still structuring the idea — reach out. I'll analyze your needs without any commitment and present the best technical path for your business, no strings attached.
I work with domestic and international companies, meeting the client's demands and delivering each stage with direct communication, defined deadlines and real execution.
Contact information
gui@guimontenegrodev.com
Business hours
Monday to Saturday:
Sundays and after-hours: Emergencies only.
Response time
I respond within 24 business hours.
