William Hanemann da Silva

I architected, modeled, designed, developed, deployed, and managed a complete clinical management software system utilized in the care of thousands of patients across various industries. The application featured a real-time distributed database, ensuring synchronization across all company branches. It also automated local and remote backups regularly. Even in the event of an internet connection drop, the system continued to function seamlessly and would sync all data once the connection was restored.

The application included:
• Comprehensive appointment management with WhatsApp reminders.
• Creation of prescriptions, exam requests, and certificates.
• Patient management, including medical history and growth development with charts for data visualization. The US CDC provided all reference data.
• User management with role-based permissions and authentication for doctors, employees, and patients.
• Consultation tables with an extensive drug list provided by the national drug agency.
• A comprehensive ICD reference.
• Full support for generating health plan billing in compliance with national government health agency regulations, including creating statistics, reports, and XML files for communication between relevant parties.

Created an Android application using Vue, Quasar, and Capacitor to manage the parking of cars, motorcycles, and trucks on a parking lot. Cars and motorcycles would stay parked between a few hours and a few days, while trucks were parked for weeks or over a month and were charged based on the number of axles.

Because some vehicles were charged based on the number of parked minutes rather than hours, there were many possible pricing solutions. The most challenging part of the project was creating a simple and easy-to-use interface to create and manage the parking prices and maintain the automated list of the available parking spots for every vehicle type.

The application calculated the parking price for every vehicle based on additional factors, such as the time of day and existing parking subscriptions. When entering the parking lot, the drivers were given receipts with QR codes that they would scan when leaving to generate invoices.

Volunteered on an application development project to keep an inventory of fabrics and patches in available sizes, colors, types, and quantities, with the app able to compare, combine, and track available materials. Users could upload unlimited photos for each record and comment, describe the fabric, and add keywords and favorites.

The record included all known fabric types within the app's internal database. It used color palettes and studies extracted from uploaded photos to help users choose threads, buttons, and accessories that work well with their material.

The app organized new ideas, pictures, and documents in filtered and classified galleries, giving users a place to keep their inspiration photos and notes while also being able to attach images and PDFs. Everything was searchable by keywords, colors, fabric names, titles, and descriptions. Users could create patterns based on geometric shapes, following the quilt-sewing technique, and obtain information on what they need to work on their project based on the available inventory.

A fully customizable desktop dashboard designed to follow cryptocurrency prices and transactions, offering support feedback lacking from exchange platforms, like the possibility to check prices by considering trading fees.
The best matching pair for a selected currency is suggested, aiming for the highest possible profit and the owned assets that could bring more profits upon selling, with or without considering the owned amount. All data is fetched in real-time through exchange platforms' APIs, and as a privacy protection measure, all user data and calculations are kept and processed on the user's device. As expected, the application has scrolling price ticks, multiple charts and views for each trading pair (including floating cards and ticks), price alerts, calculators, and more. Its financial calculator allows the user to quickly check possible transaction profit and losses considering the fees, which substantially supports trade analysis.

An online store created with Nuxt.js and Strapi aimed at selling children's and adult (women's) clothing. It had integration with the local postage system for freight calculation and with payment API (Mercado Pago).

A clean BMI and age calculator used during medical care in emergency care units. The requirements were simple:

• Doctors needed fast and instant access to inputs upon launching the app.
• All content should be available on the initial screen, with no page changing or scrolling.
• Input data should be masked, validated, and auto-corrected so that doctors should not worry about manual corrections or measurement units (weight, height, and dates). Results were always consistent.
• Charts show the current person's indexes according to data provided by the US CDC.

Although initially requested by a doctor, four years later, the entire team still uses the application today.