Hi, I'm William 👋
Software Developer with extensive experience and focus on structuring and documenting processes.
WS

About me

Software developer passionate about innovation and problem-solving. With a focus on Backend, experience with Full Stack and training in Systems Development, I build scalable and efficient applications, always exploring new technologies and challenges since 2020.

Experience

T

TradeSee

Mar 2025 - Present
Full Stack Developer (Mid-Level I)
Full Stack Developer (Mid-Level I)
Sep 2025 - Present
Full Stack Junior III Developer
Mar 2025 - Sep 2025
I work as a fullstack developer at TradeSee, a SaaS platform that transforms Supply Chain data into strategic decisions. With NestJS, Next.js, GraphQL, PostgreSQL and Supabase, I create scalable solutions, integrating robust APIs and high volume of data. Infrastructure with Docker and agile management via ClickUp. I work as a Fullstack Developer, developing scalable systems with NestJS(Node), Next.js, GraphQL, PostgreSQL, and TypeORM. My activities include integrating external APIs (such as Big Data services and payment gateways), maintaining and optimizing existing solutions, automating workflows, and improving internal processes. I also contribute to integration strategies, creating automation pipelines, and evolving the platform architecture, following Clean Architecture and SOLID principles. For infrastructure, I use Docker and participate in agile sprints organized on ClickUp.
A

Avantpro

Jan 2024 - Feb 2025
Junior Systems Development Analyst
I contributed to the maintenance and scalable construction of new features, developing many prototypes and new screens in integration with the backend. I worked with JavaScript, TypeScript, Figma, React and React Native. Avantpro encompasses a variety of tools, including Avantpro Black, Avantpro Shopee and Avantpro Mobile, where I expanded my knowledge in external and internal APIs, such as the Mercado Livre and Shopee API. I was also responsible for the full application lifecycle, from prototyping to front-end delivery with React and React Native (Expo), REST API integration, and SQL optimization in Scrum workflows.
E

EuroGrill Grills & Accessories

Jan 2022 - Nov 2023
Technical Assistant
Computer maintenance, software support, hardware installation, and practical experience with ERP, CMS, and CRM platforms.

Skills

Hard Skills

Typescript
Java
SQL
Git
Agile
Scrum

Frontend

React
Vue
Next
Nuxt
TailwindCSS
React Native
Styled Components

Backend

Nest
Spring Boot
MongoDB
DynamoDB
PostgreSQL
TypeORM
GraphQL
Microservices
Lambda
API Gateway
RabbitMQ
SQS

DevOps & Infrastructure

Docker
ECS
Kubernetes
CI/CD
GCP
Supabase
Firebase
S3 Storage
EC2

Tools & Management

Zapier
Jira
Trello
Jest
SEO
ClickUp
Grafana

Check out my work

I've worked on various projects, from simple websites to complex web applications. Check out some of my favorites.

NegocioCerto

NegocioCerto is a business intelligence and due diligence platform focused on CNPJ analysis, compliance, and lead enrichment. The frontend delivers an interactive product website and API docs, while the backend exposes modular endpoints for enrichment, compliance scoring, risk checks, credit analysis, and API key/credits management.

Vite
TailwindCSS
NestJS
EC2
Swagger
Stripe

Akashi - BaaS

Akashi is a BaaS for developers who need a simple and intuitive backend. It automatically generates JSON for integration with the frontend and, in the paid version, supports external APIs.

Next
Nest
MongoDB
Stripe
Node
React

Previzapp - Climate Assistant

API of an intelligent climate assistant that provides enriched weather data through a RESTful API and integration with WhatsApp and Telegram bots. Converts addresses into coordinates, translates data into all languages, and generates recommendations based on current weather.

NestJS
OpenWeather API
Google Cloud Translation
Jest
NodeGeocoder
Telegraf
whatsapp-web.js

Festify - Spotify Festival Generator

Festify transforms Spotify history into stunning festival posters. The API integrates with Spotify for authentication and data collection, while the frontend provides a complete visual experience to create and share personalized artwork.

NestJS
MongoDB
NextJs
Tailwind
Radix UI
Lucide React
TypeScript
Docker
Spotify Web API

Nine - URL Shortener API

Robust REST API for URL shortening built with NestJS. Includes JWT authentication, full CRUD for URLs, support for custom codes, automated testing, and interactive documentation via Swagger.

NestJS
PostgreSQL
TypeORM
JWT
Docker
Swagger
Jest
ESLint
Prettier

Nalu Table

The NaluTable component is a versatile and complex React component designed to display data in a table format with various additional functionalities such as pagination, tabs, modals, and selection controls.

Typescript
Vite React
NextJs
Npm
TailwindCSS
Material UI
Styled Components

Professional Projects

Some projects developed in a corporate environment in which I had the pleasure of participating.

Tradesee

Tradesee

A leading platform in supply chain and international trade, combining data intelligence, efficiency, and innovation to drive strategic business growth.

AvantPro

AvantPro

The most widely used e-commerce extension in Latin America, providing strategic data for sellers on Mercado Livre and Shopee, helping optimize ads and boost sales.

Stratex

Stratex

A strategic Brazilian commerce platform, in partnership with the São Paulo Chamber of Commerce, offering smart reports and qualified leads for national expansion.

Rialma

Rialma

Corporate platform developed for Grupo Rialma, centralizing strategic processes with greater control, speed, and operational visibility. The solution strengthens internal governance, streamlines cross-team workflows, and supports decision-making with reliable data in an integrated environment.

Infinity System

Infinity System

Tailored management platform for local businesses, with configurable modules based on each operation (such as rentals). Currently, 3 companies have adopted the solution.

BonoERP

BonoERP

A comprehensive ERP platform for small businesses, featuring unlimited fiscal issuance and direct integration with SEFAZ API, combining simplicity, financial control, and automation to streamline operations and boost business.

Get in touch!

Want to chat? Just send me a message with a direct message on Linkedin