Lujan Rafael Rezende Email & Phone Number

State Of Rio Grande Do Sul, Brazil

Barcelona, Ct, Es

São Paulo, Brasil

At Cashin, I have been focusing my efforts on Stack Azure, exploring Azure Data Factory and Azure Databricks to perform ETL processes. I have dedicated a special time to the Microsoft One Lake (Fabric) Preview, fully utilizing its resources, such as lakehouse, warehouse, data pipeline and notebooks.I actively participated in the implementation of the metabase throughout the company, from the initial testing stages to availability and configuration for the entire corporate… Show more At Cashin, I have been focusing my efforts on Stack Azure, exploring Azure Data Factory and Azure Databricks to perform ETL processes. I have dedicated a special time to the Microsoft One Lake (Fabric) Preview, fully utilizing its resources, such as lakehouse, warehouse, data pipeline and notebooks.I actively participated in the implementation of the metabase throughout the company, from the initial testing stages to availability and configuration for the entire corporate environment.My most impactful project was the development of a revenue forecasting system for the next six months. This project was divided into two main stages. In the first stage, I utilized a classification model to identify and categorize customers who place orders. In the second stage, I implemented a regression model to predict the specific revenue amounts for each identified customer.By the end of the project, we achieved an accurate total revenue forecast of R$9,523,368.43. This forecast not only provided a clear view of the company's future financial performance but also aided in strategic decision-making, allowing for more effective and optimized resource planning. Show less

São Paulo E Região

Within Kogui Tecnologia I worked with ETL (Extract, Transform and Load) projects, where I performed data extraction from a Wordpress database, then the data was standardized and inserted into a MySQL database and made available to the BI team develop dashboards.I worked with the integration processes of RPA (Robotic Process Automation) projects, where I performed the synchronization between API's and SQL Server database.I was part of an audio sentiment analysis project, using… Show more Within Kogui Tecnologia I worked with ETL (Extract, Transform and Load) projects, where I performed data extraction from a Wordpress database, then the data was standardized and inserted into a MySQL database and made available to the BI team develop dashboards.I worked with the integration processes of RPA (Robotic Process Automation) projects, where I performed the synchronization between API's and SQL Server database.I was part of an audio sentiment analysis project, using APIs together with CNN (Convolutional Neural Netwok) models to extract features for speaker diarization, LGBM (Light Gradient Boost Machine) models for speaker diarization and Wave2vec models in PyTorch for prediction of feelings. Along with a SQL Server database. Show less

Santo André, São Paulo, Brazil

As a Data Science Trainee at BuiltCode I worked with:1. Stock forecasting through time series (Time Series) using moving average models (ARIMA, SARIMA, SARIMAX) and also Deep Learning (DeepLearning) with recurrent neural network (LSTM).2. Developed natural language processing (NLP) projects for transcribing audio into text and analyzing sentiment using PyTorch and HuggingFace models.3. Developed document data extraction projects, using OCR (Optical Character Recognition)… Show more As a Data Science Trainee at BuiltCode I worked with:1. Stock forecasting through time series (Time Series) using moving average models (ARIMA, SARIMA, SARIMAX) and also Deep Learning (DeepLearning) with recurrent neural network (LSTM).2. Developed natural language processing (NLP) projects for transcribing audio into text and analyzing sentiment using PyTorch and HuggingFace models.3. Developed document data extraction projects, using OCR (Optical Character Recognition) and NER (Named Entity Recognition) with PyTorch and HuggingFace models.4. Deployed models, using Docker, Azure Web Service and PostgreSQL, also developing return APIs, using Flask, Flask-sqalchemy and SQL Server. Show less