Hey, I’m William
Senior {Full Stack} Web developer_
<p>With expertise in cutting-edge technologies such as Node.js, React, MongoDB, and AWS. 15+ years building scalable logistics and enterprise web platforms.</p>
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Year Experience
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Cloud Servers Managed
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Databases Managed
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Enterprise Integrations
Designing customized solutions
to meet your requirements
Full-Stack Web Development
Building scalable web applications using JavaScript, Node.js, and modern frontend frameworks. From responsive interfaces to robust backend services and APIs.
Cloud Infrastructure
Deploying and managing cloud environments on AWS, including EC2, load balancing, and scalable backend services designed for high availability.
Database Architecture
Designing and maintaining scalable databases using MongoDB, PostgreSQL, and modern data architectures for high-performance applications.
API & System Integration
Designing and integrating RESTful APIs to connect platforms, services, and enterprise systems, enabling reliable communication between applications.
Performance & Scalability
Optimizing applications for speed and scalability, improving backend performance, database queries, and frontend rendering efficiency.
Security & Best Practices
Applying secure development practices based on OWASP guidelines, ensuring authentication, data protection, and resilient application architecture.
Excited to take on new projects and collaborate.
Let's chat about your ideas. Reach out!
Some of my Projects
Casa Matagal
Institutional Website
Built a modern institutional website for Casa Matagal to showcase their premium metalwork services. The site focuses on visual presentation, responsive design, and clear calls-to-action to convert visitors into potential clients.
- Project Info
Client
Casa Matagal
Project Type
Institutional Website
Technologies
WordPress, HTML, CSS
Year
2026
RoutEasy
Logistics Platform
Development of a logistics route optimization platform used by companies to plan and manage delivery routes. I initially worked on the frontend and landing page, later contributing as a full-stack developer on the platform’s core features and system architecture.
- Project Info
Client
RoutEasy
Project Type
Logistics SaaS Platform
Technologies
Node.js · Express · AngularJS · MongoDB · JavaScript · HTML5 · CSS3
Year
2015~2024
Nickiwi
Social Platform
Development of a social platform focused on users of multi-level marketing systems. The platform supported more than 100,000 registered users and included social features, user interaction, and scalable backend services.
- Project Info
Client
SDR Produções Artísticas
Project Type
Social Network Platform
Technologies
PHP · Laravel · MongoDB · Redis · Backbone.js · jQuery · AWS
Year
2013
Fernanda Motta
Official Website
Development of a one-page website for the international model Fernanda Motta. The project included social media integrations and a responsive interface focused on showcasing media content and public presence.
- Project Info
Client
Safari Digital Media Production
Project Type
One Page Website
Technologies
HTML5 · CSS3 · jQuery · Social Media APIs
Year
2014
Gillette Avengers
Campaign Website
Frontend development and final adjustments for the Gillette Avengers campaign website before its official launch. The work focused on responsive layout improvements and final UI refinements.
- Project Info
Client
HIVE Digital Media
Project Type
Marketing Campaign Website
Technologies
HTML5 · CSS3 · jQuery · SASS
Year
2015
500 Melhores
Ranking Platform
Development of a content platform that ranked the best establishments in major Brazilian cities based on public voting. The project combined a news portal with a ranking system where users could discover and vote for top businesses across categories such as food, beauty, culture, and leisure.
- Project Info
Client
Yotta Seven Comunicação
Project Type
Content Platform
Technologies
PHP · Smarty · MySQL · HTML5 · CSS3 · jQuery
Year
2011
My Resume
I believe that working hard and trying to learn every day willmake me improve in satisfying my customers.
Core Expertise
Full Stack Development
Building production web applications across frontend, backend, APIs, databases, and cloud infrastructure.
JavaScript & Backend Engineering
Strong experience with JavaScript and Node.js, building APIs, integrations, business logic, and data-driven applications.
Databases & Cloud Infrastructure
Hands-on experience with MongoDB, AWS, production environments, and the infrastructure supporting high-volume applications.
Performance & Scalability
Optimizing applications, database workloads, and infrastructure for reliability, performance, and sustainable growth.
Experience
2017 - Present
Founder & Full Stack Engineer at Web Kingdom
Independent software development and digital product work, covering web applications, e-commerce, landing pages, APIs, and custom solutions for clients.
Node.js · Express.js · React · Next.js · MongoDB · PostgreSQL · AWS · APIs
2015 - 2024
Full Stack Developer at RoutEasy
Worked on a logistics platform serving 50+ enterprise clients, including Mercado Livre, DHL, Shopee, Solistica/FEMSA, Royal Canin, Magazine Luiza, and Grupo Pão de Açúcar.
Managed and supported production environments with 100+ AWS EC2 servers and 70+ MongoDB Atlas databases, collaborating across application development, integrations, infrastructure, and operations.
Reduced MongoDB Atlas costs by 40%+ through query and infrastructure optimization, while supporting production databases ranging from 200 GB to 600 GB.
Node.js · Express.js · AngularJS · MongoDB · JavaScript · AWS · APIs